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- CAREER FEATURE
- 04 December 2020
- Correction 09 December 2020
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How to write a superb literature review
Andy Tay is a freelance writer based in Singapore.
You can also search for this author in PubMed Google Scholar
Literature reviews are important resources for scientists. They provide historical context for a field while offering opinions on its future trajectory. Creating them can provide inspiration for one’s own research, as well as some practice in writing. But few scientists are trained in how to write a review — or in what constitutes an excellent one. Even picking the appropriate software to use can be an involved decision (see ‘Tools and techniques’). So Nature asked editors and working scientists with well-cited reviews for their tips.
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doi: https://doi.org/10.1038/d41586-020-03422-x
Interviews have been edited for length and clarity.
Updates & Corrections
Correction 09 December 2020 : An earlier version of the tables in this article included some incorrect details about the programs Zotero, Endnote and Manubot. These have now been corrected.
Hsing, I.-M., Xu, Y. & Zhao, W. Electroanalysis 19 , 755–768 (2007).
Article Google Scholar
Ledesma, H. A. et al. Nature Nanotechnol. 14 , 645–657 (2019).
Article PubMed Google Scholar
Brahlek, M., Koirala, N., Bansal, N. & Oh, S. Solid State Commun. 215–216 , 54–62 (2015).
Choi, Y. & Lee, S. Y. Nature Rev. Chem . https://doi.org/10.1038/s41570-020-00221-w (2020).
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Writing a Literature Review
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A literature review is a document or section of a document that collects key sources on a topic and discusses those sources in conversation with each other (also called synthesis ). The lit review is an important genre in many disciplines, not just literature (i.e., the study of works of literature such as novels and plays). When we say “literature review” or refer to “the literature,” we are talking about the research ( scholarship ) in a given field. You will often see the terms “the research,” “the scholarship,” and “the literature” used mostly interchangeably.
Where, when, and why would I write a lit review?
There are a number of different situations where you might write a literature review, each with slightly different expectations; different disciplines, too, have field-specific expectations for what a literature review is and does. For instance, in the humanities, authors might include more overt argumentation and interpretation of source material in their literature reviews, whereas in the sciences, authors are more likely to report study designs and results in their literature reviews; these differences reflect these disciplines’ purposes and conventions in scholarship. You should always look at examples from your own discipline and talk to professors or mentors in your field to be sure you understand your discipline’s conventions, for literature reviews as well as for any other genre.
A literature review can be a part of a research paper or scholarly article, usually falling after the introduction and before the research methods sections. In these cases, the lit review just needs to cover scholarship that is important to the issue you are writing about; sometimes it will also cover key sources that informed your research methodology.
Lit reviews can also be standalone pieces, either as assignments in a class or as publications. In a class, a lit review may be assigned to help students familiarize themselves with a topic and with scholarship in their field, get an idea of the other researchers working on the topic they’re interested in, find gaps in existing research in order to propose new projects, and/or develop a theoretical framework and methodology for later research. As a publication, a lit review usually is meant to help make other scholars’ lives easier by collecting and summarizing, synthesizing, and analyzing existing research on a topic. This can be especially helpful for students or scholars getting into a new research area, or for directing an entire community of scholars toward questions that have not yet been answered.
What are the parts of a lit review?
Most lit reviews use a basic introduction-body-conclusion structure; if your lit review is part of a larger paper, the introduction and conclusion pieces may be just a few sentences while you focus most of your attention on the body. If your lit review is a standalone piece, the introduction and conclusion take up more space and give you a place to discuss your goals, research methods, and conclusions separately from where you discuss the literature itself.
Introduction:
- An introductory paragraph that explains what your working topic and thesis is
- A forecast of key topics or texts that will appear in the review
- Potentially, a description of how you found sources and how you analyzed them for inclusion and discussion in the review (more often found in published, standalone literature reviews than in lit review sections in an article or research paper)
- Summarize and synthesize: Give an overview of the main points of each source and combine them into a coherent whole
- Analyze and interpret: Don’t just paraphrase other researchers – add your own interpretations where possible, discussing the significance of findings in relation to the literature as a whole
- Critically Evaluate: Mention the strengths and weaknesses of your sources
- Write in well-structured paragraphs: Use transition words and topic sentence to draw connections, comparisons, and contrasts.
Conclusion:
- Summarize the key findings you have taken from the literature and emphasize their significance
- Connect it back to your primary research question
How should I organize my lit review?
Lit reviews can take many different organizational patterns depending on what you are trying to accomplish with the review. Here are some examples:
- Chronological : The simplest approach is to trace the development of the topic over time, which helps familiarize the audience with the topic (for instance if you are introducing something that is not commonly known in your field). If you choose this strategy, be careful to avoid simply listing and summarizing sources in order. Try to analyze the patterns, turning points, and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred (as mentioned previously, this may not be appropriate in your discipline — check with a teacher or mentor if you’re unsure).
- Thematic : If you have found some recurring central themes that you will continue working with throughout your piece, you can organize your literature review into subsections that address different aspects of the topic. For example, if you are reviewing literature about women and religion, key themes can include the role of women in churches and the religious attitude towards women.
- Qualitative versus quantitative research
- Empirical versus theoretical scholarship
- Divide the research by sociological, historical, or cultural sources
- Theoretical : In many humanities articles, the literature review is the foundation for the theoretical framework. You can use it to discuss various theories, models, and definitions of key concepts. You can argue for the relevance of a specific theoretical approach or combine various theorical concepts to create a framework for your research.
What are some strategies or tips I can use while writing my lit review?
Any lit review is only as good as the research it discusses; make sure your sources are well-chosen and your research is thorough. Don’t be afraid to do more research if you discover a new thread as you’re writing. More info on the research process is available in our "Conducting Research" resources .
As you’re doing your research, create an annotated bibliography ( see our page on the this type of document ). Much of the information used in an annotated bibliography can be used also in a literature review, so you’ll be not only partially drafting your lit review as you research, but also developing your sense of the larger conversation going on among scholars, professionals, and any other stakeholders in your topic.
Usually you will need to synthesize research rather than just summarizing it. This means drawing connections between sources to create a picture of the scholarly conversation on a topic over time. Many student writers struggle to synthesize because they feel they don’t have anything to add to the scholars they are citing; here are some strategies to help you:
- It often helps to remember that the point of these kinds of syntheses is to show your readers how you understand your research, to help them read the rest of your paper.
- Writing teachers often say synthesis is like hosting a dinner party: imagine all your sources are together in a room, discussing your topic. What are they saying to each other?
- Look at the in-text citations in each paragraph. Are you citing just one source for each paragraph? This usually indicates summary only. When you have multiple sources cited in a paragraph, you are more likely to be synthesizing them (not always, but often
- Read more about synthesis here.
The most interesting literature reviews are often written as arguments (again, as mentioned at the beginning of the page, this is discipline-specific and doesn’t work for all situations). Often, the literature review is where you can establish your research as filling a particular gap or as relevant in a particular way. You have some chance to do this in your introduction in an article, but the literature review section gives a more extended opportunity to establish the conversation in the way you would like your readers to see it. You can choose the intellectual lineage you would like to be part of and whose definitions matter most to your thinking (mostly humanities-specific, but this goes for sciences as well). In addressing these points, you argue for your place in the conversation, which tends to make the lit review more compelling than a simple reporting of other sources.
Page Content
Overview of the review report format, the first read-through, first read considerations, spotting potential major flaws, concluding the first reading, rejection after the first reading, before starting the second read-through, doing the second read-through, the second read-through: section by section guidance, how to structure your report, on presentation and style, criticisms & confidential comments to editors, the recommendation, when recommending rejection, additional resources, step by step guide to reviewing a manuscript.
When you receive an invitation to peer review, you should be sent a copy of the paper's abstract to help you decide whether you wish to do the review. Try to respond to invitations promptly - it will prevent delays. It is also important at this stage to declare any potential Conflict of Interest.
The structure of the review report varies between journals. Some follow an informal structure, while others have a more formal approach.
" Number your comments!!! " (Jonathon Halbesleben, former Editor of Journal of Occupational and Organizational Psychology)
Informal Structure
Many journals don't provide criteria for reviews beyond asking for your 'analysis of merits'. In this case, you may wish to familiarize yourself with examples of other reviews done for the journal, which the editor should be able to provide or, as you gain experience, rely on your own evolving style.
Formal Structure
Other journals require a more formal approach. Sometimes they will ask you to address specific questions in your review via a questionnaire. Or they might want you to rate the manuscript on various attributes using a scorecard. Often you can't see these until you log in to submit your review. So when you agree to the work, it's worth checking for any journal-specific guidelines and requirements. If there are formal guidelines, let them direct the structure of your review.
In Both Cases
Whether specifically required by the reporting format or not, you should expect to compile comments to authors and possibly confidential ones to editors only.
![research paper academic review Reviewing with Empathy](https://authorservices.wiley.com/asset/Reviewing-with-Empathy-300x714.jpg)
Following the invitation to review, when you'll have received the article abstract, you should already understand the aims, key data and conclusions of the manuscript. If you don't, make a note now that you need to feedback on how to improve those sections.
The first read-through is a skim-read. It will help you form an initial impression of the paper and get a sense of whether your eventual recommendation will be to accept or reject the paper.
Keep a pen and paper handy when skim-reading.
Try to bear in mind the following questions - they'll help you form your overall impression:
- What is the main question addressed by the research? Is it relevant and interesting?
- How original is the topic? What does it add to the subject area compared with other published material?
- Is the paper well written? Is the text clear and easy to read?
- Are the conclusions consistent with the evidence and arguments presented? Do they address the main question posed?
- If the author is disagreeing significantly with the current academic consensus, do they have a substantial case? If not, what would be required to make their case credible?
- If the paper includes tables or figures, what do they add to the paper? Do they aid understanding or are they superfluous?
While you should read the whole paper, making the right choice of what to read first can save time by flagging major problems early on.
Editors say, " Specific recommendations for remedying flaws are VERY welcome ."
Examples of possibly major flaws include:
- Drawing a conclusion that is contradicted by the author's own statistical or qualitative evidence
- The use of a discredited method
- Ignoring a process that is known to have a strong influence on the area under study
If experimental design features prominently in the paper, first check that the methodology is sound - if not, this is likely to be a major flaw.
You might examine:
- The sampling in analytical papers
- The sufficient use of control experiments
- The precision of process data
- The regularity of sampling in time-dependent studies
- The validity of questions, the use of a detailed methodology and the data analysis being done systematically (in qualitative research)
- That qualitative research extends beyond the author's opinions, with sufficient descriptive elements and appropriate quotes from interviews or focus groups
Major Flaws in Information
If methodology is less of an issue, it's often a good idea to look at the data tables, figures or images first. Especially in science research, it's all about the information gathered. If there are critical flaws in this, it's very likely the manuscript will need to be rejected. Such issues include:
- Insufficient data
- Unclear data tables
- Contradictory data that either are not self-consistent or disagree with the conclusions
- Confirmatory data that adds little, if anything, to current understanding - unless strong arguments for such repetition are made
If you find a major problem, note your reasoning and clear supporting evidence (including citations).
After the initial read and using your notes, including those of any major flaws you found, draft the first two paragraphs of your review - the first summarizing the research question addressed and the second the contribution of the work. If the journal has a prescribed reporting format, this draft will still help you compose your thoughts.
The First Paragraph
This should state the main question addressed by the research and summarize the goals, approaches, and conclusions of the paper. It should:
- Help the editor properly contextualize the research and add weight to your judgement
- Show the author what key messages are conveyed to the reader, so they can be sure they are achieving what they set out to do
- Focus on successful aspects of the paper so the author gets a sense of what they've done well
The Second Paragraph
This should provide a conceptual overview of the contribution of the research. So consider:
- Is the paper's premise interesting and important?
- Are the methods used appropriate?
- Do the data support the conclusions?
After drafting these two paragraphs, you should be in a position to decide whether this manuscript is seriously flawed and should be rejected (see the next section). Or whether it is publishable in principle and merits a detailed, careful read through.
Even if you are coming to the opinion that an article has serious flaws, make sure you read the whole paper. This is very important because you may find some really positive aspects that can be communicated to the author. This could help them with future submissions.
A full read-through will also make sure that any initial concerns are indeed correct and fair. After all, you need the context of the whole paper before deciding to reject. If you still intend to recommend rejection, see the section "When recommending rejection."
Once the paper has passed your first read and you've decided the article is publishable in principle, one purpose of the second, detailed read-through is to help prepare the manuscript for publication. You may still decide to recommend rejection following a second reading.
" Offer clear suggestions for how the authors can address the concerns raised. In other words, if you're going to raise a problem, provide a solution ." (Jonathon Halbesleben, Editor of Journal of Occupational and Organizational Psychology)
Preparation
To save time and simplify the review:
- Don't rely solely upon inserting comments on the manuscript document - make separate notes
- Try to group similar concerns or praise together
- If using a review program to note directly onto the manuscript, still try grouping the concerns and praise in separate notes - it helps later
- Note line numbers of text upon which your notes are based - this helps you find items again and also aids those reading your review
Now that you have completed your preparations, you're ready to spend an hour or so reading carefully through the manuscript.
As you're reading through the manuscript for a second time, you'll need to keep in mind the argument's construction, the clarity of the language and content.
With regard to the argument’s construction, you should identify:
- Any places where the meaning is unclear or ambiguous
- Any factual errors
- Any invalid arguments
You may also wish to consider:
- Does the title properly reflect the subject of the paper?
- Does the abstract provide an accessible summary of the paper?
- Do the keywords accurately reflect the content?
- Is the paper an appropriate length?
- Are the key messages short, accurate and clear?
Not every submission is well written. Part of your role is to make sure that the text’s meaning is clear.
Editors say, " If a manuscript has many English language and editing issues, please do not try and fix it. If it is too bad, note that in your review and it should be up to the authors to have the manuscript edited ."
If the article is difficult to understand, you should have rejected it already. However, if the language is poor but you understand the core message, see if you can suggest improvements to fix the problem:
- Are there certain aspects that could be communicated better, such as parts of the discussion?
- Should the authors consider resubmitting to the same journal after language improvements?
- Would you consider looking at the paper again once these issues are dealt with?
On Grammar and Punctuation
Your primary role is judging the research content. Don't spend time polishing grammar or spelling. Editors will make sure that the text is at a high standard before publication. However, if you spot grammatical errors that affect clarity of meaning, then it's important to highlight these. Expect to suggest such amendments - it's rare for a manuscript to pass review with no corrections.
A 2010 study of nursing journals found that 79% of recommendations by reviewers were influenced by grammar and writing style (Shattel, et al., 2010).
1. The Introduction
A well-written introduction:
- Sets out the argument
- Summarizes recent research related to the topic
- Highlights gaps in current understanding or conflicts in current knowledge
- Establishes the originality of the research aims by demonstrating the need for investigations in the topic area
- Gives a clear idea of the target readership, why the research was carried out and the novelty and topicality of the manuscript
Originality and Topicality
Originality and topicality can only be established in the light of recent authoritative research. For example, it's impossible to argue that there is a conflict in current understanding by referencing articles that are 10 years old.
Authors may make the case that a topic hasn't been investigated in several years and that new research is required. This point is only valid if researchers can point to recent developments in data gathering techniques or to research in indirectly related fields that suggest the topic needs revisiting. Clearly, authors can only do this by referencing recent literature. Obviously, where older research is seminal or where aspects of the methodology rely upon it, then it is perfectly appropriate for authors to cite some older papers.
Editors say, "Is the report providing new information; is it novel or just confirmatory of well-known outcomes ?"
It's common for the introduction to end by stating the research aims. By this point you should already have a good impression of them - if the explicit aims come as a surprise, then the introduction needs improvement.
2. Materials and Methods
Academic research should be replicable, repeatable and robust - and follow best practice.
Replicable Research
This makes sufficient use of:
- Control experiments
- Repeated analyses
- Repeated experiments
These are used to make sure observed trends are not due to chance and that the same experiment could be repeated by other researchers - and result in the same outcome. Statistical analyses will not be sound if methods are not replicable. Where research is not replicable, the paper should be recommended for rejection.
Repeatable Methods
These give enough detail so that other researchers are able to carry out the same research. For example, equipment used or sampling methods should all be described in detail so that others could follow the same steps. Where methods are not detailed enough, it's usual to ask for the methods section to be revised.
Robust Research
This has enough data points to make sure the data are reliable. If there are insufficient data, it might be appropriate to recommend revision. You should also consider whether there is any in-built bias not nullified by the control experiments.
Best Practice
During these checks you should keep in mind best practice:
- Standard guidelines were followed (e.g. the CONSORT Statement for reporting randomized trials)
- The health and safety of all participants in the study was not compromised
- Ethical standards were maintained
If the research fails to reach relevant best practice standards, it's usual to recommend rejection. What's more, you don't then need to read any further.
3. Results and Discussion
This section should tell a coherent story - What happened? What was discovered or confirmed?
Certain patterns of good reporting need to be followed by the author:
- They should start by describing in simple terms what the data show
- They should make reference to statistical analyses, such as significance or goodness of fit
- Once described, they should evaluate the trends observed and explain the significance of the results to wider understanding. This can only be done by referencing published research
- The outcome should be a critical analysis of the data collected
Discussion should always, at some point, gather all the information together into a single whole. Authors should describe and discuss the overall story formed. If there are gaps or inconsistencies in the story, they should address these and suggest ways future research might confirm the findings or take the research forward.
4. Conclusions
This section is usually no more than a few paragraphs and may be presented as part of the results and discussion, or in a separate section. The conclusions should reflect upon the aims - whether they were achieved or not - and, just like the aims, should not be surprising. If the conclusions are not evidence-based, it's appropriate to ask for them to be re-written.
5. Information Gathered: Images, Graphs and Data Tables
If you find yourself looking at a piece of information from which you cannot discern a story, then you should ask for improvements in presentation. This could be an issue with titles, labels, statistical notation or image quality.
Where information is clear, you should check that:
- The results seem plausible, in case there is an error in data gathering
- The trends you can see support the paper's discussion and conclusions
- There are sufficient data. For example, in studies carried out over time are there sufficient data points to support the trends described by the author?
You should also check whether images have been edited or manipulated to emphasize the story they tell. This may be appropriate but only if authors report on how the image has been edited (e.g. by highlighting certain parts of an image). Where you feel that an image has been edited or manipulated without explanation, you should highlight this in a confidential comment to the editor in your report.
6. List of References
You will need to check referencing for accuracy, adequacy and balance.
Where a cited article is central to the author's argument, you should check the accuracy and format of the reference - and bear in mind different subject areas may use citations differently. Otherwise, it's the editor’s role to exhaustively check the reference section for accuracy and format.
You should consider if the referencing is adequate:
- Are important parts of the argument poorly supported?
- Are there published studies that show similar or dissimilar trends that should be discussed?
- If a manuscript only uses half the citations typical in its field, this may be an indicator that referencing should be improved - but don't be guided solely by quantity
- References should be relevant, recent and readily retrievable
Check for a well-balanced list of references that is:
- Helpful to the reader
- Fair to competing authors
- Not over-reliant on self-citation
- Gives due recognition to the initial discoveries and related work that led to the work under assessment
You should be able to evaluate whether the article meets the criteria for balanced referencing without looking up every reference.
7. Plagiarism
By now you will have a deep understanding of the paper's content - and you may have some concerns about plagiarism.
Identified Concern
If you find - or already knew of - a very similar paper, this may be because the author overlooked it in their own literature search. Or it may be because it is very recent or published in a journal slightly outside their usual field.
You may feel you can advise the author how to emphasize the novel aspects of their own study, so as to better differentiate it from similar research. If so, you may ask the author to discuss their aims and results, or modify their conclusions, in light of the similar article. Of course, the research similarities may be so great that they render the work unoriginal and you have no choice but to recommend rejection.
"It's very helpful when a reviewer can point out recent similar publications on the same topic by other groups, or that the authors have already published some data elsewhere ." (Editor feedback)
Suspected Concern
If you suspect plagiarism, including self-plagiarism, but cannot recall or locate exactly what is being plagiarized, notify the editor of your suspicion and ask for guidance.
Most editors have access to software that can check for plagiarism.
Editors are not out to police every paper, but when plagiarism is discovered during peer review it can be properly addressed ahead of publication. If plagiarism is discovered only after publication, the consequences are worse for both authors and readers, because a retraction may be necessary.
For detailed guidelines see COPE's Ethical guidelines for reviewers and Wiley's Best Practice Guidelines on Publishing Ethics .
8. Search Engine Optimization (SEO)
After the detailed read-through, you will be in a position to advise whether the title, abstract and key words are optimized for search purposes. In order to be effective, good SEO terms will reflect the aims of the research.
A clear title and abstract will improve the paper's search engine rankings and will influence whether the user finds and then decides to navigate to the main article. The title should contain the relevant SEO terms early on. This has a major effect on the impact of a paper, since it helps it appear in search results. A poor abstract can then lose the reader's interest and undo the benefit of an effective title - whilst the paper's abstract may appear in search results, the potential reader may go no further.
So ask yourself, while the abstract may have seemed adequate during earlier checks, does it:
- Do justice to the manuscript in this context?
- Highlight important findings sufficiently?
- Present the most interesting data?
Editors say, " Does the Abstract highlight the important findings of the study ?"
If there is a formal report format, remember to follow it. This will often comprise a range of questions followed by comment sections. Try to answer all the questions. They are there because the editor felt that they are important. If you're following an informal report format you could structure your report in three sections: summary, major issues, minor issues.
- Give positive feedback first. Authors are more likely to read your review if you do so. But don't overdo it if you will be recommending rejection
- Briefly summarize what the paper is about and what the findings are
- Try to put the findings of the paper into the context of the existing literature and current knowledge
- Indicate the significance of the work and if it is novel or mainly confirmatory
- Indicate the work's strengths, its quality and completeness
- State any major flaws or weaknesses and note any special considerations. For example, if previously held theories are being overlooked
Major Issues
- Are there any major flaws? State what they are and what the severity of their impact is on the paper
- Has similar work already been published without the authors acknowledging this?
- Are the authors presenting findings that challenge current thinking? Is the evidence they present strong enough to prove their case? Have they cited all the relevant work that would contradict their thinking and addressed it appropriately?
- If major revisions are required, try to indicate clearly what they are
- Are there any major presentational problems? Are figures & tables, language and manuscript structure all clear enough for you to accurately assess the work?
- Are there any ethical issues? If you are unsure it may be better to disclose these in the confidential comments section
Minor Issues
- Are there places where meaning is ambiguous? How can this be corrected?
- Are the correct references cited? If not, which should be cited instead/also? Are citations excessive, limited, or biased?
- Are there any factual, numerical or unit errors? If so, what are they?
- Are all tables and figures appropriate, sufficient, and correctly labelled? If not, say which are not
Your review should ultimately help the author improve their article. So be polite, honest and clear. You should also try to be objective and constructive, not subjective and destructive.
You should also:
- Write clearly and so you can be understood by people whose first language is not English
- Avoid complex or unusual words, especially ones that would even confuse native speakers
- Number your points and refer to page and line numbers in the manuscript when making specific comments
- If you have been asked to only comment on specific parts or aspects of the manuscript, you should indicate clearly which these are
- Treat the author's work the way you would like your own to be treated
Most journals give reviewers the option to provide some confidential comments to editors. Often this is where editors will want reviewers to state their recommendation - see the next section - but otherwise this area is best reserved for communicating malpractice such as suspected plagiarism, fraud, unattributed work, unethical procedures, duplicate publication, bias or other conflicts of interest.
However, this doesn't give reviewers permission to 'backstab' the author. Authors can't see this feedback and are unable to give their side of the story unless the editor asks them to. So in the spirit of fairness, write comments to editors as though authors might read them too.
Reviewers should check the preferences of individual journals as to where they want review decisions to be stated. In particular, bear in mind that some journals will not want the recommendation included in any comments to authors, as this can cause editors difficulty later - see Section 11 for more advice about working with editors.
You will normally be asked to indicate your recommendation (e.g. accept, reject, revise and resubmit, etc.) from a fixed-choice list and then to enter your comments into a separate text box.
Recommending Acceptance
If you're recommending acceptance, give details outlining why, and if there are any areas that could be improved. Don't just give a short, cursory remark such as 'great, accept'. See Improving the Manuscript
Recommending Revision
Where improvements are needed, a recommendation for major or minor revision is typical. You may also choose to state whether you opt in or out of the post-revision review too. If recommending revision, state specific changes you feel need to be made. The author can then reply to each point in turn.
Some journals offer the option to recommend rejection with the possibility of resubmission – this is most relevant where substantial, major revision is necessary.
What can reviewers do to help? " Be clear in their comments to the author (or editor) which points are absolutely critical if the paper is given an opportunity for revisio n." (Jonathon Halbesleben, Editor of Journal of Occupational and Organizational Psychology)
Recommending Rejection
If recommending rejection or major revision, state this clearly in your review (and see the next section, 'When recommending rejection').
Where manuscripts have serious flaws you should not spend any time polishing the review you've drafted or give detailed advice on presentation.
Editors say, " If a reviewer suggests a rejection, but her/his comments are not detailed or helpful, it does not help the editor in making a decision ."
In your recommendations for the author, you should:
- Give constructive feedback describing ways that they could improve the research
- Keep the focus on the research and not the author. This is an extremely important part of your job as a reviewer
- Avoid making critical confidential comments to the editor while being polite and encouraging to the author - the latter may not understand why their manuscript has been rejected. Also, they won't get feedback on how to improve their research and it could trigger an appeal
Remember to give constructive criticism even if recommending rejection. This helps developing researchers improve their work and explains to the editor why you felt the manuscript should not be published.
" When the comments seem really positive, but the recommendation is rejection…it puts the editor in a tough position of having to reject a paper when the comments make it sound like a great paper ." (Jonathon Halbesleben, Editor of Journal of Occupational and Organizational Psychology)
Visit our Wiley Author Learning and Training Channel for expert advice on peer review.
Watch the video, Ethical considerations of Peer Review
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Literature Reviews
What this handout is about.
This handout will explain what literature reviews are and offer insights into the form and construction of literature reviews in the humanities, social sciences, and sciences.
Introduction
OK. You’ve got to write a literature review. You dust off a novel and a book of poetry, settle down in your chair, and get ready to issue a “thumbs up” or “thumbs down” as you leaf through the pages. “Literature review” done. Right?
Wrong! The “literature” of a literature review refers to any collection of materials on a topic, not necessarily the great literary texts of the world. “Literature” could be anything from a set of government pamphlets on British colonial methods in Africa to scholarly articles on the treatment of a torn ACL. And a review does not necessarily mean that your reader wants you to give your personal opinion on whether or not you liked these sources.
What is a literature review, then?
A literature review discusses published information in a particular subject area, and sometimes information in a particular subject area within a certain time period.
A literature review can be just a simple summary of the sources, but it usually has an organizational pattern and combines both summary and synthesis. A summary is a recap of the important information of the source, but a synthesis is a re-organization, or a reshuffling, of that information. It might give a new interpretation of old material or combine new with old interpretations. Or it might trace the intellectual progression of the field, including major debates. And depending on the situation, the literature review may evaluate the sources and advise the reader on the most pertinent or relevant.
But how is a literature review different from an academic research paper?
The main focus of an academic research paper is to develop a new argument, and a research paper is likely to contain a literature review as one of its parts. In a research paper, you use the literature as a foundation and as support for a new insight that you contribute. The focus of a literature review, however, is to summarize and synthesize the arguments and ideas of others without adding new contributions.
Why do we write literature reviews?
Literature reviews provide you with a handy guide to a particular topic. If you have limited time to conduct research, literature reviews can give you an overview or act as a stepping stone. For professionals, they are useful reports that keep them up to date with what is current in the field. For scholars, the depth and breadth of the literature review emphasizes the credibility of the writer in his or her field. Literature reviews also provide a solid background for a research paper’s investigation. Comprehensive knowledge of the literature of the field is essential to most research papers.
Who writes these things, anyway?
Literature reviews are written occasionally in the humanities, but mostly in the sciences and social sciences; in experiment and lab reports, they constitute a section of the paper. Sometimes a literature review is written as a paper in itself.
Let’s get to it! What should I do before writing the literature review?
If your assignment is not very specific, seek clarification from your instructor:
- Roughly how many sources should you include?
- What types of sources (books, journal articles, websites)?
- Should you summarize, synthesize, or critique your sources by discussing a common theme or issue?
- Should you evaluate your sources?
- Should you provide subheadings and other background information, such as definitions and/or a history?
Find models
Look for other literature reviews in your area of interest or in the discipline and read them to get a sense of the types of themes you might want to look for in your own research or ways to organize your final review. You can simply put the word “review” in your search engine along with your other topic terms to find articles of this type on the Internet or in an electronic database. The bibliography or reference section of sources you’ve already read are also excellent entry points into your own research.
Narrow your topic
There are hundreds or even thousands of articles and books on most areas of study. The narrower your topic, the easier it will be to limit the number of sources you need to read in order to get a good survey of the material. Your instructor will probably not expect you to read everything that’s out there on the topic, but you’ll make your job easier if you first limit your scope.
Keep in mind that UNC Libraries have research guides and to databases relevant to many fields of study. You can reach out to the subject librarian for a consultation: https://library.unc.edu/support/consultations/ .
And don’t forget to tap into your professor’s (or other professors’) knowledge in the field. Ask your professor questions such as: “If you had to read only one book from the 90’s on topic X, what would it be?” Questions such as this help you to find and determine quickly the most seminal pieces in the field.
Consider whether your sources are current
Some disciplines require that you use information that is as current as possible. In the sciences, for instance, treatments for medical problems are constantly changing according to the latest studies. Information even two years old could be obsolete. However, if you are writing a review in the humanities, history, or social sciences, a survey of the history of the literature may be what is needed, because what is important is how perspectives have changed through the years or within a certain time period. Try sorting through some other current bibliographies or literature reviews in the field to get a sense of what your discipline expects. You can also use this method to consider what is currently of interest to scholars in this field and what is not.
Strategies for writing the literature review
Find a focus.
A literature review, like a term paper, is usually organized around ideas, not the sources themselves as an annotated bibliography would be organized. This means that you will not just simply list your sources and go into detail about each one of them, one at a time. No. As you read widely but selectively in your topic area, consider instead what themes or issues connect your sources together. Do they present one or different solutions? Is there an aspect of the field that is missing? How well do they present the material and do they portray it according to an appropriate theory? Do they reveal a trend in the field? A raging debate? Pick one of these themes to focus the organization of your review.
Convey it to your reader
A literature review may not have a traditional thesis statement (one that makes an argument), but you do need to tell readers what to expect. Try writing a simple statement that lets the reader know what is your main organizing principle. Here are a couple of examples:
The current trend in treatment for congestive heart failure combines surgery and medicine. More and more cultural studies scholars are accepting popular media as a subject worthy of academic consideration.
Consider organization
You’ve got a focus, and you’ve stated it clearly and directly. Now what is the most effective way of presenting the information? What are the most important topics, subtopics, etc., that your review needs to include? And in what order should you present them? Develop an organization for your review at both a global and local level:
First, cover the basic categories
Just like most academic papers, literature reviews also must contain at least three basic elements: an introduction or background information section; the body of the review containing the discussion of sources; and, finally, a conclusion and/or recommendations section to end the paper. The following provides a brief description of the content of each:
- Introduction: Gives a quick idea of the topic of the literature review, such as the central theme or organizational pattern.
- Body: Contains your discussion of sources and is organized either chronologically, thematically, or methodologically (see below for more information on each).
- Conclusions/Recommendations: Discuss what you have drawn from reviewing literature so far. Where might the discussion proceed?
Organizing the body
Once you have the basic categories in place, then you must consider how you will present the sources themselves within the body of your paper. Create an organizational method to focus this section even further.
To help you come up with an overall organizational framework for your review, consider the following scenario:
You’ve decided to focus your literature review on materials dealing with sperm whales. This is because you’ve just finished reading Moby Dick, and you wonder if that whale’s portrayal is really real. You start with some articles about the physiology of sperm whales in biology journals written in the 1980’s. But these articles refer to some British biological studies performed on whales in the early 18th century. So you check those out. Then you look up a book written in 1968 with information on how sperm whales have been portrayed in other forms of art, such as in Alaskan poetry, in French painting, or on whale bone, as the whale hunters in the late 19th century used to do. This makes you wonder about American whaling methods during the time portrayed in Moby Dick, so you find some academic articles published in the last five years on how accurately Herman Melville portrayed the whaling scene in his novel.
Now consider some typical ways of organizing the sources into a review:
- Chronological: If your review follows the chronological method, you could write about the materials above according to when they were published. For instance, first you would talk about the British biological studies of the 18th century, then about Moby Dick, published in 1851, then the book on sperm whales in other art (1968), and finally the biology articles (1980s) and the recent articles on American whaling of the 19th century. But there is relatively no continuity among subjects here. And notice that even though the sources on sperm whales in other art and on American whaling are written recently, they are about other subjects/objects that were created much earlier. Thus, the review loses its chronological focus.
- By publication: Order your sources by publication chronology, then, only if the order demonstrates a more important trend. For instance, you could order a review of literature on biological studies of sperm whales if the progression revealed a change in dissection practices of the researchers who wrote and/or conducted the studies.
- By trend: A better way to organize the above sources chronologically is to examine the sources under another trend, such as the history of whaling. Then your review would have subsections according to eras within this period. For instance, the review might examine whaling from pre-1600-1699, 1700-1799, and 1800-1899. Under this method, you would combine the recent studies on American whaling in the 19th century with Moby Dick itself in the 1800-1899 category, even though the authors wrote a century apart.
- Thematic: Thematic reviews of literature are organized around a topic or issue, rather than the progression of time. However, progression of time may still be an important factor in a thematic review. For instance, the sperm whale review could focus on the development of the harpoon for whale hunting. While the study focuses on one topic, harpoon technology, it will still be organized chronologically. The only difference here between a “chronological” and a “thematic” approach is what is emphasized the most: the development of the harpoon or the harpoon technology.But more authentic thematic reviews tend to break away from chronological order. For instance, a thematic review of material on sperm whales might examine how they are portrayed as “evil” in cultural documents. The subsections might include how they are personified, how their proportions are exaggerated, and their behaviors misunderstood. A review organized in this manner would shift between time periods within each section according to the point made.
- Methodological: A methodological approach differs from the two above in that the focusing factor usually does not have to do with the content of the material. Instead, it focuses on the “methods” of the researcher or writer. For the sperm whale project, one methodological approach would be to look at cultural differences between the portrayal of whales in American, British, and French art work. Or the review might focus on the economic impact of whaling on a community. A methodological scope will influence either the types of documents in the review or the way in which these documents are discussed. Once you’ve decided on the organizational method for the body of the review, the sections you need to include in the paper should be easy to figure out. They should arise out of your organizational strategy. In other words, a chronological review would have subsections for each vital time period. A thematic review would have subtopics based upon factors that relate to the theme or issue.
Sometimes, though, you might need to add additional sections that are necessary for your study, but do not fit in the organizational strategy of the body. What other sections you include in the body is up to you. Put in only what is necessary. Here are a few other sections you might want to consider:
- Current Situation: Information necessary to understand the topic or focus of the literature review.
- History: The chronological progression of the field, the literature, or an idea that is necessary to understand the literature review, if the body of the literature review is not already a chronology.
- Methods and/or Standards: The criteria you used to select the sources in your literature review or the way in which you present your information. For instance, you might explain that your review includes only peer-reviewed articles and journals.
Questions for Further Research: What questions about the field has the review sparked? How will you further your research as a result of the review?
Begin composing
Once you’ve settled on a general pattern of organization, you’re ready to write each section. There are a few guidelines you should follow during the writing stage as well. Here is a sample paragraph from a literature review about sexism and language to illuminate the following discussion:
However, other studies have shown that even gender-neutral antecedents are more likely to produce masculine images than feminine ones (Gastil, 1990). Hamilton (1988) asked students to complete sentences that required them to fill in pronouns that agreed with gender-neutral antecedents such as “writer,” “pedestrian,” and “persons.” The students were asked to describe any image they had when writing the sentence. Hamilton found that people imagined 3.3 men to each woman in the masculine “generic” condition and 1.5 men per woman in the unbiased condition. Thus, while ambient sexism accounted for some of the masculine bias, sexist language amplified the effect. (Source: Erika Falk and Jordan Mills, “Why Sexist Language Affects Persuasion: The Role of Homophily, Intended Audience, and Offense,” Women and Language19:2).
Use evidence
In the example above, the writers refer to several other sources when making their point. A literature review in this sense is just like any other academic research paper. Your interpretation of the available sources must be backed up with evidence to show that what you are saying is valid.
Be selective
Select only the most important points in each source to highlight in the review. The type of information you choose to mention should relate directly to the review’s focus, whether it is thematic, methodological, or chronological.
Use quotes sparingly
Falk and Mills do not use any direct quotes. That is because the survey nature of the literature review does not allow for in-depth discussion or detailed quotes from the text. Some short quotes here and there are okay, though, if you want to emphasize a point, or if what the author said just cannot be rewritten in your own words. Notice that Falk and Mills do quote certain terms that were coined by the author, not common knowledge, or taken directly from the study. But if you find yourself wanting to put in more quotes, check with your instructor.
Summarize and synthesize
Remember to summarize and synthesize your sources within each paragraph as well as throughout the review. The authors here recapitulate important features of Hamilton’s study, but then synthesize it by rephrasing the study’s significance and relating it to their own work.
Keep your own voice
While the literature review presents others’ ideas, your voice (the writer’s) should remain front and center. Notice that Falk and Mills weave references to other sources into their own text, but they still maintain their own voice by starting and ending the paragraph with their own ideas and their own words. The sources support what Falk and Mills are saying.
Use caution when paraphrasing
When paraphrasing a source that is not your own, be sure to represent the author’s information or opinions accurately and in your own words. In the preceding example, Falk and Mills either directly refer in the text to the author of their source, such as Hamilton, or they provide ample notation in the text when the ideas they are mentioning are not their own, for example, Gastil’s. For more information, please see our handout on plagiarism .
Revise, revise, revise
Draft in hand? Now you’re ready to revise. Spending a lot of time revising is a wise idea, because your main objective is to present the material, not the argument. So check over your review again to make sure it follows the assignment and/or your outline. Then, just as you would for most other academic forms of writing, rewrite or rework the language of your review so that you’ve presented your information in the most concise manner possible. Be sure to use terminology familiar to your audience; get rid of unnecessary jargon or slang. Finally, double check that you’ve documented your sources and formatted the review appropriately for your discipline. For tips on the revising and editing process, see our handout on revising drafts .
Works consulted
We consulted these works while writing this handout. This is not a comprehensive list of resources on the handout’s topic, and we encourage you to do your own research to find additional publications. Please do not use this list as a model for the format of your own reference list, as it may not match the citation style you are using. For guidance on formatting citations, please see the UNC Libraries citation tutorial . We revise these tips periodically and welcome feedback.
Anson, Chris M., and Robert A. Schwegler. 2010. The Longman Handbook for Writers and Readers , 6th ed. New York: Longman.
Jones, Robert, Patrick Bizzaro, and Cynthia Selfe. 1997. The Harcourt Brace Guide to Writing in the Disciplines . New York: Harcourt Brace.
Lamb, Sandra E. 1998. How to Write It: A Complete Guide to Everything You’ll Ever Write . Berkeley: Ten Speed Press.
Rosen, Leonard J., and Laurence Behrens. 2003. The Allyn & Bacon Handbook , 5th ed. New York: Longman.
Troyka, Lynn Quittman, and Doug Hesse. 2016. Simon and Schuster Handbook for Writers , 11th ed. London: Pearson.
You may reproduce it for non-commercial use if you use the entire handout and attribute the source: The Writing Center, University of North Carolina at Chapel Hill
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Writing a Scientific Review Article: Comprehensive Insights for Beginners
Ayodeji amobonye.
1 Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. Box 1334, KwaZulu-Natal, Durban 4000, South Africa
2 Writing Centre, Durban University of Technology, P.O. Box 1334 KwaZulu-Natal, Durban 4000, South Africa
Japareng Lalung
3 School of Industrial Technology, Universiti Sains Malaysia, Gelugor 11800, Pulau Pinang, Malaysia
Santhosh Pillai
Associated data.
The data and materials that support the findings of this study are available from the corresponding author upon reasonable request.
Review articles present comprehensive overview of relevant literature on specific themes and synthesise the studies related to these themes, with the aim of strengthening the foundation of knowledge and facilitating theory development. The significance of review articles in science is immeasurable as both students and researchers rely on these articles as the starting point for their research. Interestingly, many postgraduate students are expected to write review articles for journal publications as a way of demonstrating their ability to contribute to new knowledge in their respective fields. However, there is no comprehensive instructional framework to guide them on how to analyse and synthesise the literature in their niches into publishable review articles. The dearth of ample guidance or explicit training results in students having to learn all by themselves, usually by trial and error, which often leads to high rejection rates from publishing houses. Therefore, this article seeks to identify these challenges from a beginner's perspective and strives to plug the identified gaps and discrepancies. Thus, the purpose of this paper is to serve as a systematic guide for emerging scientists and to summarise the most important information on how to write and structure a publishable review article.
1. Introduction
Early scientists, spanning from the Ancient Egyptian civilization to the Scientific Revolution of the 16 th /17 th century, based their research on intuitions, personal observations, and personal insights. Thus, less time was spent on background reading as there was not much literature to refer to. This is well illustrated in the case of Sir Isaac Newton's apple tree and the theory of gravity, as well as Gregor Mendel's pea plants and the theory of inheritance. However, with the astronomical expansion in scientific knowledge and the emergence of the information age in the last century, new ideas are now being built on previously published works, thus the periodic need to appraise the huge amount of already published literature [ 1 ]. According to Birkle et al. [ 2 ], the Web of Science—an authoritative database of research publications and citations—covered more than 80 million scholarly materials. Hence, a critical review of prior and relevant literature is indispensable for any research endeavour as it provides the necessary framework needed for synthesising new knowledge and for highlighting new insights and perspectives [ 3 ].
Review papers are generally considered secondary research publications that sum up already existing works on a particular research topic or question and relate them to the current status of the topic. This makes review articles distinctly different from scientific research papers. While the primary aim of the latter is to develop new arguments by reporting original research, the former is focused on summarising and synthesising previous ideas, studies, and arguments, without adding new experimental contributions. Review articles basically describe the content and quality of knowledge that are currently available, with a special focus on the significance of the previous works. To this end, a review article cannot simply reiterate a subject matter, but it must contribute to the field of knowledge by synthesising available materials and offering a scholarly critique of theory [ 4 ]. Typically, these articles critically analyse both quantitative and qualitative studies by scrutinising experimental results, the discussion of the experimental data, and in some instances, previous review articles to propose new working theories. Thus, a review article is more than a mere exhaustive compilation of all that has been published on a topic; it must be a balanced, informative, perspective, and unbiased compendium of previous studies which may also include contrasting findings, inconsistencies, and conventional and current views on the subject [ 5 ].
Hence, the essence of a review article is measured by what is achieved, what is discovered, and how information is communicated to the reader [ 6 ]. According to Steward [ 7 ], a good literature review should be analytical, critical, comprehensive, selective, relevant, synthetic, and fully referenced. On the other hand, a review article is considered to be inadequate if it is lacking in focus or outcome, overgeneralised, opinionated, unbalanced, and uncritical [ 7 ]. Most review papers fail to meet these standards and thus can be viewed as mere summaries of previous works in a particular field of study. In one of the few studies that assessed the quality of review articles, none of the 50 papers that were analysed met the predefined criteria for a good review [ 8 ]. However, beginners must also realise that there is no bad writing in the true sense; there is only writing in evolution and under refinement. Literally, every piece of writing can be improved upon, right from the first draft until the final published manuscript. Hence, a paper can only be referred to as bad and unfixable when the author is not open to corrections or when the writer gives up on it.
According to Peat et al. [ 9 ], “everything is easy when you know how,” a maxim which applies to scientific writing in general and review writing in particular. In this regard, the authors emphasized that the writer should be open to learning and should also follow established rules instead of following a blind trial-and-error approach. In contrast to the popular belief that review articles should only be written by experienced scientists and researchers, recent trends have shown that many early-career scientists, especially postgraduate students, are currently expected to write review articles during the course of their studies. However, these scholars have little or no access to formal training on how to analyse and synthesise the research literature in their respective fields [ 10 ]. Consequently, students seeking guidance on how to write or improve their literature reviews are less likely to find published works on the subject, particularly in the science fields. Although various publications have dealt with the challenges of searching for literature, or writing literature reviews for dissertation/thesis purposes, there is little or no information on how to write a comprehensive review article for publication. In addition to the paucity of published information to guide the potential author, the lack of understanding of what constitutes a review paper compounds their challenges. Thus, the purpose of this paper is to serve as a guide for writing review papers for journal publishing. This work draws on the experience of the authors to assist early-career scientists/researchers in the “hard skill” of authoring review articles. Even though there is no single path to writing scientifically, or to writing reviews in particular, this paper attempts to simplify the process by looking at this subject from a beginner's perspective. Hence, this paper highlights the differences between the types of review articles in the sciences while also explaining the needs and purpose of writing review articles. Furthermore, it presents details on how to search for the literature as well as how to structure the manuscript to produce logical and coherent outputs. It is hoped that this work will ease prospective scientific writers into the challenging but rewarding art of writing review articles.
2. Benefits of Review Articles to the Author
Analysing literature gives an overview of the “WHs”: WHat has been reported in a particular field or topic, WHo the key writers are, WHat are the prevailing theories and hypotheses, WHat questions are being asked (and answered), and WHat methods and methodologies are appropriate and useful [ 11 ]. For new or aspiring researchers in a particular field, it can be quite challenging to get a comprehensive overview of their respective fields, especially the historical trends and what has been studied previously. As such, the importance of review articles to knowledge appraisal and contribution cannot be overemphasised, which is reflected in the constant demand for such articles in the research community. However, it is also important for the author, especially the first-time author, to recognise the importance of his/her investing time and effort into writing a quality review article.
Generally, literature reviews are undertaken for many reasons, mainly for publication and for dissertation purposes. The major purpose of literature reviews is to provide direction and information for the improvement of scientific knowledge. They also form a significant component in the research process and in academic assessment [ 12 ]. There may be, however, a thin line between a dissertation literature review and a published review article, given that with some modifications, a literature review can be transformed into a legitimate and publishable scholarly document. According to Gülpınar and Güçlü [ 6 ], the basic motivation for writing a review article is to make a comprehensive synthesis of the most appropriate literature on a specific research inquiry or topic. Thus, conducting a literature review assists in demonstrating the author's knowledge about a particular field of study, which may include but not be limited to its history, theories, key variables, vocabulary, phenomena, and methodologies [ 10 ]. Furthermore, publishing reviews is beneficial as it permits the researchers to examine different questions and, as a result, enhances the depth and diversity of their scientific reasoning [ 1 ]. In addition, writing review articles allows researchers to share insights with the scientific community while identifying knowledge gaps to be addressed in future research. The review writing process can also be a useful tool in training early-career scientists in leadership, coordination, project management, and other important soft skills necessary for success in the research world [ 13 ]. Another important reason for authoring reviews is that such publications have been observed to be remarkably influential, extending the reach of an author in multiple folds of what can be achieved by primary research papers [ 1 ]. The trend in science is for authors to receive more citations from their review articles than from their original research articles. According to Miranda and Garcia-Carpintero [ 14 ], review articles are, on average, three times more frequently cited than original research articles; they also asserted that a 20% increase in review authorship could result in a 40–80% increase in citations of the author. As a result, writing reviews can significantly impact a researcher's citation output and serve as a valuable channel to reach a wider scientific audience. In addition, the references cited in a review article also provide the reader with an opportunity to dig deeper into the topic of interest. Thus, review articles can serve as a valuable repository for consultation, increasing the visibility of the authors and resulting in more citations.
3. Types of Review Articles
The first step in writing a good literature review is to decide on the particular type of review to be written; hence, it is important to distinguish and understand the various types of review articles. Although scientific review articles have been classified according to various schemes, however, they are broadly categorised into narrative reviews, systematic reviews, and meta-analyses [ 15 ]. It was observed that more authors—as well as publishers—were leaning towards systematic reviews and meta-analysis while downplaying narrative reviews; however, the three serve different aims and should all be considered equally important in science [ 1 ]. Bibliometric reviews and patent reviews, which are closely related to meta-analysis, have also gained significant attention recently. However, from another angle, a review could also be of two types. In the first class, authors could deal with a widely studied topic where there is already an accumulated body of knowledge that requires analysis and synthesis [ 3 ]. At the other end of the spectrum, the authors may have to address an emerging issue that would benefit from exposure to potential theoretical foundations; hence, their contribution would arise from the fresh theoretical foundations proposed in developing a conceptual model [ 3 ].
3.1. Narrative Reviews
Narrative reviewers are mainly focused on providing clarification and critical analysis on a particular topic or body of literature through interpretative synthesis, creativity, and expert judgement. According to Green et al. [ 16 ], a narrative review can be in the form of editorials, commentaries, and narrative overviews. However, editorials and commentaries are usually expert opinions; hence, a beginner is more likely to write a narrative overview, which is more general and is also referred to as an unsystematic narrative review. Similarly, the literature review section of most dissertations and empirical papers is typically narrative in nature. Typically, narrative reviews combine results from studies that may have different methodologies to address different questions or to formulate a broad theoretical formulation [ 1 ]. They are largely integrative as strong focus is placed on the assimilation and synthesis of various aspects in the review, which may involve comparing and contrasting research findings or deriving structured implications [ 17 ]. In addition, they are also qualitative studies because they do not follow strict selection processes; hence, choosing publications is relatively more subjective and unsystematic [ 18 ]. However, despite their popularity, there are concerns about their inherent subjectivity. In many instances, when the supporting data for narrative reviews are examined more closely, the evaluations provided by the author(s) become quite questionable [ 19 ]. Nevertheless, if the goal of the author is to formulate a new theory that connects diverse strands of research, a narrative method is most appropriate.
3.2. Systematic Reviews
In contrast to narrative reviews, which are generally descriptive, systematic reviews employ a systematic approach to summarise evidence on research questions. Hence, systematic reviews make use of precise and rigorous criteria to identify, evaluate, and subsequently synthesise all relevant literature on a particular topic [ 12 , 20 ]. As a result, systematic reviews are more likely to inspire research ideas by identifying knowledge gaps or inconsistencies, thus helping the researcher to clearly define the research hypotheses or questions [ 21 ]. Furthermore, systematic reviews may serve as independent research projects in their own right, as they follow a defined methodology to search and combine reliable results to synthesise a new database that can be used for a variety of purposes [ 22 ]. Typically, the peculiarities of the individual reviewer, different search engines, and information databases used all ensure that no two searches will yield the same systematic results even if the searches are conducted simultaneously and under identical criteria [ 11 ]. Hence, attempts are made at standardising the exercise via specific methods that would limit bias and chance effects, prevent duplications, and provide more accurate results upon which conclusions and decisions can be made.
The most established of these methods is the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines which objectively defined statements, guidelines, reporting checklists, and flowcharts for undertaking systematic reviews as well as meta-analysis [ 23 ]. Though mainly designed for research in medical sciences, the PRISMA approach has gained wide acceptance in other fields of science and is based on eight fundamental propositions. These include the explicit definition of the review question, an unambiguous outline of the study protocol, an objective and exhaustive systematic review of reputable literature, and an unambiguous identification of included literature based on defined selection criteria [ 24 ]. Other considerations include an unbiased appraisal of the quality of the selected studies (literature), organic synthesis of the evidence of the study, preparation of the manuscript based on the reporting guidelines, and periodic update of the review as new data emerge [ 24 ]. Other methods such as PRISMA-P (Preferred Reporting Items for Systematic review and Meta-Analysis Protocols), MOOSE (Meta-analysis Of Observational Studies in Epidemiology), and ROSES (Reporting Standards for Systematic Evidence Syntheses) have since been developed for systematic reviews (and meta-analysis), with most of them being derived from PRISMA.
Consequently, systematic reviews—unlike narrative reviews—must contain a methodology section which in addition to all that was highlighted above must fully describe the precise criteria used in formulating the research question and setting the inclusion or exclusion criteria used in selecting/accessing the literature. Similarly, the criteria for evaluating the quality of the literature included in the review as well as for analysing, synthesising, and disseminating the findings must be fully described in the methodology section.
3.3. Meta-Analysis
Meta-analyses are considered as more specialised forms of systematic reviews. Generally, they combine the results of many studies that use similar or closely related methods to address the same question or share a common quantitative evaluation method [ 25 ]. However, meta-analyses are also a step higher than other systematic reviews as they are focused on numerical data and involve the use of statistics in evaluating different studies and synthesising new knowledge. The major advantage of this type of review is the increased statistical power leading to more reliable results for inferring modest associations and a more comprehensive understanding of the true impact of a research study [ 26 ]. Unlike in traditional systematic reviews, research topics covered in meta-analyses must be mature enough to allow the inclusion of sufficient homogeneous empirical research in terms of subjects, interventions, and outcomes [ 27 , 28 ].
Being an advanced form of systematic review, meta-analyses must also have a distinct methodology section; hence, the standard procedures involved in the traditional systematic review (especially PRISMA) also apply in meta-analyses [ 23 ]. In addition to the common steps in formulating systematic reviews, meta-analyses are required to describe how nested and missing data are handled, the effect observed in each study, the confidence interval associated with each synthesised effect, and any potential for bias presented within the sample(s) [ 17 ]. According to Paul and Barari [ 28 ], a meta-analysis must also detail the final sample, the meta-analytic model, and the overall analysis, moderator analysis, and software employed. While the overall analysis involves the statistical characterization of the relationships between variables in the meta-analytic framework and their significance, the moderator analysis defines the different variables that may affect variations in the original studies [ 28 , 29 ]. It must also be noted that the accuracy and reliability of meta-analyses have both been significantly enhanced by the incorporation of statistical approaches such as Bayesian analysis [ 30 ], network analysis [ 31 ], and more recently, machine learning [ 32 ].
3.4. Bibliometric Review
A bibliometric review, commonly referred to as bibliometric analysis, is a systematic evaluation of published works within a specific field or discipline [ 33 ]. This bibliometric methodology involves the use of quantitative methods to analyse bibliometric data such as the characteristics and numbers of publications, units of citations, authorship, co-authorship, and journal impact factors [ 34 ]. Academics use bibliometric analysis with different objectives in mind, which includes uncovering emerging trends in article and journal performance, elaborating collaboration patterns and research constituents, evaluating the impact and influence of particular authors, publications, or research groups, and highlighting the intellectual framework of a certain field [ 35 ]. It is also used to inform policy and decision-making. Similarly to meta-analysis, bibliometric reviews rely upon quantitative techniques, thus avoiding the interpretation bias that could arise from the qualitative techniques of other types of reviews [ 36 ]. However, while bibliometric analysis synthesises the bibliometric and intellectual structure of a field by examining the social and structural linkages between various research parts, meta-analysis focuses on summarising empirical evidence by probing the direction and strength of effects and relationships among variables, especially in open research questions [ 37 , 38 ]. However, similarly to systematic review and meta-analysis, a bibliometric review also requires a well-detailed methodology section. The amount of data to be analysed in bibliometric analysis is quite massive, running to hundreds and tens of thousands in some cases. Although the data are objective in nature (e.g., number of citations and publications and occurrences of keywords and topics), the interpretation is usually carried out through both objective (e.g., performance analysis) and subjective (e.g., thematic analysis) evaluations [ 35 ]. However, the invention and availability of bibliometric software such as BibExcel, Gephi, Leximancer, and VOSviewer and scientific databases such as Dimensions, Web of Science, and Scopus have made this type of analysis more feasible.
3.5. Patent Review
Patent reviews provide a comprehensive analysis and critique of a specific patent or a group of related patents, thus presenting a concise understanding of the technology or innovation that is covered by the patent [ 39 ]. This type of article is useful for researchers as it also enhances their understanding of the legal, technical, and commercial aspects of an intellectual property/innovation; in addition, it is also important for stakeholders outside the research community including IP (intellectual property) specialists, legal professionals, and technology-transfer officers [ 40 ]. Typically, patent reviews encompass the scope, background, claims, legal implications, technical specifications, and potential commercial applications of the patent(s). The article may also include a discussion of the patent's strengths and weaknesses, as well as its potential impact on the industry or field in which it operates. Most times, reviews are time specified, they may be regionalised, and the data are usually retrieved via patent searches on databases such as that of the European Patent Office ( https://www.epo.org/searching.html ), United States Patent and Trademark Office ( https://patft.uspto.gov/ ), the World Intellectual Property Organization's PATENTSCOPE ( https://patentscope.wipo.int/search/en/structuredSearch.jsf ), Google Patent ( https://www.google.com/?tbm=pts ), and China National Intellectual Property Administration ( https://pss-system.cponline.cnipa.gov.cn/conventionalSearch ). According to Cerimi et al. [ 41 ], the retrieved data and analysed may include the patent number, patent status, filing date, application date, grant dates, inventor, assignee, and pending applications. While data analysis is usually carried out by general data software such as Microsoft Excel, an intelligence software solely dedicated to patent research and analysis, Orbit Intelligence has been found to be more efficient [ 39 ]. It is also mandatory to include a methodology section in a patent review, and this should be explicit, thorough, and precise to allow a clear understanding of how the analysis was carried out and how the conclusions were arrived at.
4. Searching Literature
One of the most challenging tasks in writing a review article on a subject is the search for relevant literature to populate the manuscript as the author is required to garner information from an endless number of sources. This is even more challenging as research outputs have been increasing astronomically, especially in the last decade, with thousands of new articles published annually in various fields. It is therefore imperative that the author must not only be aware of the overall trajectory in a field of investigation but must also be cognizant of recent studies so as not to publish outdated research or review articles. Basically, the search for the literature involves a coherent conceptual structuring of the topic itself and a thorough collation of evidence under the common themes which might reflect the histories, conflicts, standoffs, revolutions, and/or evolutions in the field [ 7 ]. To start the search process, the author must carefully identify and select broad keywords relevant to the subject; subsequently, the keywords should be developed to refine the search into specific subheadings that would facilitate the structure of the review.
Two main tactics have been identified for searching the literature, namely, systematic and snowballing [ 42 ]. The systematic approach involves searching literature with specific keywords (for example, cancer, antioxidant, and nanoparticles), which leads to an almost unmanageable and overwhelming list of possible sources [ 43 ]. The snowballing approach, however, involves the identification of a particular publication, followed by the compilation of a bibliography of articles based on the reference list of the identified publication [ 44 ]. Many times, it might be necessary to combine both approaches, but irrespective, the author must keep an accurate track and record of papers cited in the search. A simple and efficient strategy for populating the bibliography of review articles is to go through the abstract (and sometimes the conclusion) of a paper; if the abstract is related to the topic of discourse, the author might go ahead and read the entire article; otherwise, he/she is advised to move on [ 45 ]. Winchester and Salji [ 5 ] noted that to learn the background of the subject/topic to be reviewed, starting literature searches with academic textbooks or published review articles is imperative, especially for beginners. Furthermore, it would also assist in compiling the list of keywords, identifying areas of further exploration, and providing a glimpse of the current state of the research. However, past reviews ideally are not to serve as the foundation of a new review as they are written from someone else's viewpoint, which might have been tainted with some bias. Fortunately, the accessibility and search for the literature have been made relatively easier than they were a few decades ago as the current information age has placed an enormous volume of knowledge right at our fingertips [ 46 ]. Nevertheless, when gathering the literature from the Internet, authors should exercise utmost caution as much of the information may not be verified or peer-reviewed and thus may be unregulated and unreliable. For instance, Wikipedia, despite being a large repository of information with more than 6.7 million articles in the English language alone, is considered unreliable for scientific literature reviews, due to its openness to public editing [ 47 ]. However, in addition to peer-reviewed journal publications—which are most ideal—reviews can also be drawn from a wide range of other sources such as technical documents, in-house reports, conference abstracts, and conference proceedings. Similarly, “Google Scholar”—as against “Google” and other general search engines—is more appropriate as its searches are restricted to only academic articles produced by scholarly societies or/and publishers [ 48 ]. Furthermore, the various electronic databases, such as ScienceDirect, Web of Science, PubMed, and MEDLINE, many of which focus on specific fields of research, are also ideal options [ 49 ]. Advancement in computer indexing has remarkably expanded the ease and ability to search large databases for every potentially relevant article. In addition to searching by topic, literature search can be modified by time; however, there must be a balance between old papers and recent ones. The general consensus in science is that publications less than five years old are considered recent.
It is important, especially in systematic reviews and meta-analyses, that the specific method of running the computer searches be properly documented as there is the need to include this in the method (methodology) section of such papers. Typically, the method details the keywords, databases explored, search terms used, and the inclusion/exclusion criteria applied in the selection of data and any other specific decision/criteria. All of these will ensure the reproducibility and thoroughness of the search and the selection procedure. However, Randolph [ 10 ] noted that Internet searches might not give the exhaustive list of articles needed for a review article; hence, it is advised that authors search through the reference lists of articles that were obtained initially from the Internet search. After determining the relevant articles from the list, the author should read through the references of these articles and repeat the cycle until saturation is reached [ 10 ]. After populating the articles needed for the literature review, the next step is to analyse them individually and in their whole entirety. A systematic approach to this is to identify the key information within the papers, examine them in depth, and synthesise original perspectives by integrating the information and making inferences based on the findings. In this regard, it is imperative to link one source to the other in a logical manner, for instance, taking note of studies with similar methodologies, papers that agree, or results that are contradictory [ 42 ].
5. Structuring the Review Article
The title and abstract are the main selling points of a review article, as most readers will only peruse these two elements and usually go on to read the full paper if they are drawn in by either or both of the two. Tullu [ 50 ] recommends that the title of a scientific paper “should be descriptive, direct, accurate, appropriate, interesting, concise, precise, unique, and not be misleading.” In addition to providing “just enough details” to entice the reader, words in the titles are also used by electronic databases, journal websites, and search engines to index and retrieve a particular paper during a search [ 51 ]. Titles are of different types and must be chosen according to the topic under review. They are generally classified as descriptive, declarative, or interrogative and can also be grouped into compound, nominal, or full-sentence titles [ 50 ]. The subject of these categorisations has been extensively discussed in many articles; however, the reader must also be aware of the compound titles, which usually contain a main title and a subtitle. Typically, subtitles provide additional context—to the main title—and they may specify the geographic scope of the research, research methodology, or sample size [ 52 ].
Just like primary research articles, there are many debates about the optimum length of a review article's title. However, the general consensus is to keep the title as brief as possible while not being too general. A title length between 10 and 15 words is recommended, since longer titles can be more challenging to comprehend. Paiva et al. [ 53 ] observed that articles which contain 95 characters or less get more views and citations. However, emphasis must be placed on conciseness as the audience will be more satisfied if they can understand what exactly the review has contributed to the field, rather than just a hint about the general topic area. Authors should also endeavour to stick to the journal's specific requirements, especially regarding the length of the title and what they should or should not contain [ 9 ]. Thus, avoidance of filler words such as “a review on/of,” “an observation of,” or “a study of” is a very simple way to limit title length. In addition, abbreviations or acronyms should be avoided in the title, except the standard or commonly interpreted ones such as AIDS, DNA, HIV, and RNA. In summary, to write an effective title, the authors should consider the following points. What is the paper about? What was the methodology used? What were the highlights and major conclusions? Subsequently, the author should list all the keywords from these answers, construct a sentence from these keywords, and finally delete all redundant words from the sentence title. It is also possible to gain some ideas by scanning indices and article titles in major journals in the field. It is important to emphasise that a title is not chosen and set in stone, and the title is most likely to be continually revised and adjusted until the end of the writing process.
5.2. Abstract
The abstract, also referred to as the synopsis, is a summary of the full research paper; it is typically independent and can stand alone. For most readers, a publication does not exist beyond the abstract, partly because abstracts are often the only section of a paper that is made available to the readers at no cost, whereas the full paper may attract a payment or subscription [ 54 ]. Thus, the abstract is supposed to set the tone for the few readers who wish to read the rest of the paper. It has also been noted that the abstract gives the first impression of a research work to journal editors, conference scientific committees, or referees, who might outright reject the paper if the abstract is poorly written or inadequate [ 50 ]. Hence, it is imperative that the abstract succinctly represents the entire paper and projects it positively. Just like the title, abstracts have to be balanced, comprehensive, concise, functional, independent, precise, scholarly, and unbiased and not be misleading [ 55 ]. Basically, the abstract should be formulated using keywords from all the sections of the main manuscript. Thus, it is pertinent that the abstract conveys the focus, key message, rationale, and novelty of the paper without any compromise or exaggeration. Furthermore, the abstract must be consistent with the rest of the paper; as basic as this instruction might sound, it is not to be taken for granted. For example, a study by Vrijhoef and Steuten [ 56 ] revealed that 18–68% of 264 abstracts from some scientific journals contained information that was inconsistent with the main body of the publications.
Abstracts can either be structured or unstructured; in addition, they can further be classified as either descriptive or informative. Unstructured abstracts, which are used by many scientific journals, are free flowing with no predefined subheadings, while structured abstracts have specific subheadings/subsections under which the abstract needs to be composed. Structured abstracts have been noted to be more informative and are usually divided into subsections which include the study background/introduction, objectives, methodology design, results, and conclusions [ 57 ]. No matter the style chosen, the author must carefully conform to the instructions provided by the potential journal of submission, which may include but are not limited to the format, font size/style, word limit, and subheadings [ 58 ]. The word limit for abstracts in most scientific journals is typically between 150 and 300 words. It is also a general rule that abstracts do not contain any references whatsoever.
Typically, an abstract should be written in the active voice, and there is no such thing as a perfect abstract as it could always be improved on. It is advised that the author first makes an initial draft which would contain all the essential parts of the paper, which could then be polished subsequently. The draft should begin with a brief background which would lead to the research questions. It might also include a general overview of the methodology used (if applicable) and importantly, the major results/observations/highlights of the review paper. The abstract should end with one or few sentences about any implications, perspectives, or future research that may be developed from the review exercise. Finally, the authors should eliminate redundant words and edit the abstract to the correct word count permitted by the journal [ 59 ]. It is always beneficial to read previous abstracts published in the intended journal, related topics/subjects from other journals, and other reputable sources. Furthermore, the author should endeavour to get feedback on the abstract especially from peers and co-authors. As the abstract is the face of the whole paper, it is best that it is the last section to be finalised, as by this time, the author would have developed a clearer understanding of the findings and conclusions of the entire paper.
5.3. Graphical Abstracts
Since the mid-2000s, an increasing number of journals now require authors to provide a graphical abstract (GA) in addition to the traditional written abstract, to increase the accessibility of scientific publications to readers [ 60 ]. A study showed that publications with GA performed better than those without it, when the abstract views, total citations, and downloads were compared [ 61 ]. However, the GA should provide “a single, concise pictorial, and visual summary of the main findings of an article” [ 62 ]. Although they are meant to be a stand-alone summary of the whole paper, it has been noted that they are not so easily comprehensible without having read through the traditionally written abstract [ 63 ]. It is important to note that, like traditional abstracts, many reputable journals require GAs to adhere to certain specifications such as colour, dimension, quality, file size, and file format (usually JPEG/JPG, PDF, PNG, or TIFF). In addition, it is imperative to use engaging and accurate figures, all of which must be synthesised in order to accurately reflect the key message of the paper. Currently, there are various online or downloadable graphical tools that can be used for creating GAs, such as Microsoft Paint or PowerPoint, Mindthegraph, ChemDraw, CorelDraw, and BioRender.
5.4. Keywords
As a standard practice, journals require authors to select 4–8 keywords (or phrases), which are typically listed below the abstract. A good set of keywords will enable indexers and search engines to find relevant papers more easily and can be considered as a very concise abstract [ 64 ]. According to Dewan and Gupta [ 51 ], the selection of appropriate keywords will significantly enhance the retrieval, accession, and consequently, the citation of the review paper. Ideally, keywords can be variants of the terms/phrases used in the title, the abstract, and the main text, but they should ideally not be the exact words in the main title. Choosing the most appropriate keywords for a review article involves listing down the key terms and phrases in the article, including abbreviations. Subsequently, a quick review of the glossary/vocabulary/term list or indexing standard in the specific discipline will assist in selecting the best and most precise keywords that match those used in the databases from the list drawn. In addition, the keywords should not be broad or general terms (e.g., DNA, biology, and enzymes) but must be specific to the field or subfield of study as well as to the particular paper [ 65 ].
5.5. Introduction
The introduction of an article is the first major section of the manuscript, and it presents basic information to the reader without compelling them to study past publications. In addition, the introduction directs the reader to the main arguments and points developed in the main body of the article while clarifying the current state of knowledge in that particular area of research [ 12 ]. The introduction part of a review article is usually sectionalised into background information, a description of the main topic and finally a statement of the main purpose of the review [ 66 ]. Authors may begin the introduction with brief general statements—which provide background knowledge on the subject matter—that lead to more specific ones [ 67 ]. It is at this point that the reader's attention must be caught as the background knowledge must highlight the importance and justification for the subject being discussed, while also identifying the major problem to be addressed [ 68 ]. In addition, the background should be broad enough to attract even nonspecialists in the field to maximise the impact and widen the reach of the article. All of these should be done in the light of current literature; however, old references may also be used for historical purposes. A very important aspect of the introduction is clearly stating and establishing the research problem(s) and how a review of the particular topic contributes to those problem(s). Thus, the research gap which the paper intends to fill, the limitations of previous works and past reviews, if available, and the new knowledge to be contributed must all be highlighted. Inadequate information and the inability to clarify the problem will keep readers (who have the desire to obtain new information) from reading beyond the introduction [ 69 ]. It is also pertinent that the author establishes the purpose of reviewing the literature and defines the scope as well as the major synthesised point of view. Furthermore, a brief insight into the criteria used to select, evaluate, and analyse the literature, as well as the outline or sequence of the review, should be provided in the introduction. Subsequently, the specific objectives of the review article must be presented. The last part of the “introduction” section should focus on the solution, the way forward, the recommendations, and the further areas of research as deduced from the whole review process. According to DeMaria [ 70 ], clearly expressed or recommended solutions to an explicitly revealed problem are very important for the wholesomeness of the “introduction” section. It is believed that following these steps will give readers the opportunity to track the problems and the corresponding solution from their own perspective in the light of current literature. As against some suggestions that the introduction should be written only in present tenses, it is also believed that it could be done with other tenses in addition to the present tense. In this regard, general facts should be written in the present tense, specific research/work should be in the past tense, while the concluding statement should be in the past perfect or simple past. Furthermore, many of the abbreviations to be used in the rest of the manuscript and their explanations should be defined in this section.
5.6. Methodology
Writing a review article is equivalent to conducting a research study, with the information gathered by the author (reviewer) representing the data. Like all major studies, it involves conceptualisation, planning, implementation, and dissemination [ 71 ], all of which may be detailed in a methodology section, if necessary. Hence, the methodological section of a review paper (which can also be referred to as the review protocol) details how the relevant literature was selected and how it was analysed as well as summarised. The selection details may include, but are not limited to, the database consulted and the specific search terms used together with the inclusion/exclusion criteria. As earlier highlighted in Section 3 , a description of the methodology is required for all types of reviews except for narrative reviews. This is partly because unlike narrative reviews, all other review articles follow systematic approaches which must ensure significant reproducibility [ 72 ]. Therefore, where necessary, the methods of data extraction from the literature and data synthesis must also be highlighted as well. In some cases, it is important to show how data were combined by highlighting the statistical methods used, measures of effect, and tests performed, as well as demonstrating heterogeneity and publication bias [ 73 ].
The methodology should also detail the major databases consulted during the literature search, e.g., Dimensions, ScienceDirect, Web of Science, MEDLINE, and PubMed. For meta-analysis, it is imperative to highlight the software and/or package used, which could include Comprehensive Meta-Analysis, OpenMEE, Review Manager (RevMan), Stata, SAS, and R Studio. It is also necessary to state the mathematical methods used for the analysis; examples of these include the Bayesian analysis, the Mantel–Haenszel method, and the inverse variance method. The methodology should also state the number of authors that carried out the initial review stage of the study, as it has been recommended that at least two reviews should be done blindly and in parallel, especially when it comes to the acquisition and synthesis of data [ 74 ]. Finally, the quality and validity assessment of the publication used in the review must be stated and well clarified [ 73 ].
5.7. Main Body of the Review
Ideally, the main body of a publishable review should answer these questions: What is new (contribution)? Why so (logic)? So what (impact)? How well it is done (thoroughness)? The flow of the main body of a review article must be well organised to adequately maintain the attention of the readers as well as guide them through the section. It is recommended that the author should consider drawing a conceptual scheme of the main body first, using methods such as mind-mapping. This will help create a logical flow of thought and presentation, while also linking the various sections of the manuscript together. According to Moreira [ 75 ], “reports do not simply yield their findings, rather reviewers make them yield,” and thus, it is the author's responsibility to transform “resistant” texts into “docile” texts. Hence, after the search for the literature, the essential themes and key concepts of the review paper must be identified and synthesised together. This synthesis primarily involves creating hypotheses about the relationships between the concepts with the aim of increasing the understanding of the topic being reviewed. The important information from the various sources should not only be summarised, but the significance of studies must be related back to the initial question(s) posed by the review article. Furthermore, MacLure [ 76 ] stated that data are not just to be plainly “extracted intact” and “used exactly as extracted,” but must be modified, reconfigured, transformed, transposed, converted, tabulated, graphed, or manipulated to enable synthesis, combination, and comparison. Therefore, different pieces of information must be extracted from the reports in which they were previously deposited and then refined into the body of the new article [ 75 ]. To this end, adequate comparison and combination might require that “qualitative data be quantified” or/and “quantitative data may be qualitized” [ 77 ]. In order to accomplish all of these goals, the author may have to transform, paraphrase, generalize, specify, and reorder the text [ 78 ]. For comprehensiveness, the body paragraphs should be arranged in a similar order as it was initially stated in the abstract or/and introduction. Thus, the main body could be divided into thematic areas, each of which could be independently comprehensive and treated as a mini review. Similarly, the sections can also be arranged chronologically depending on the focus of the review. Furthermore, the abstractions should proceed from a wider general view of the literature being reviewed and then be narrowed down to the specifics. In the process, deep insights should also be provided between the topic of the review and the wider subject area, e.g., fungal enzymes and enzymes in general. The abstractions must also be discussed in more detail by presenting more specific information from the identified sources (with proper citations of course!). For example, it is important to identify and highlight contrary findings and rival interpretations as well as to point out areas of agreement or debate among different bodies of literature. Often, there are previous reviews on the same topic/concept; however, this does not prevent a new author from writing one on the same topic, especially if the previous reviews were written many years ago. However, it is important that the body of the new manuscript be written from a new angle that was not adequately covered in the past reviews and should also incorporate new studies that have accumulated since the last review(s). In addition, the new review might also highlight the approaches, limitations, and conclusions of the past studies. But the authors must not be excessively critical of the past reviews as this is regarded by many authors as a sign of poor professionalism [ 3 , 79 ]. Daft [ 79 ] emphasized that it is more important for a reviewer to state how their research builds on previous work instead of outright claiming that previous works are incompetent and inadequate. However, if a series of related papers on one topic have a common error or research flaw that needs rectification, the reviewer must point this out with the aim of moving the field forward [ 3 ]. Like every other scientific paper, the main body of a review article also needs to be consistent in style, for example, in the choice of passive vs. active voice and present vs. past tense. It is also important to note that tables and figures can serve as a powerful tool for highlighting key points in the body of the review, and they are now considered core elements of reviews. For more guidance and insights into what should make up the contents of a good review article, readers are also advised to get familiarised with the Boote and Beile [ 80 ] literature review scoring rubric as well as the review article checklist of Short [ 81 ].
5.8. Tables and Figures
An ideal review article should be logically structured and efficiently utilise illustrations, in the form of tables and figures, to convey the key findings and relationships in the study. According to Tay [ 13 ], illustrations often take a secondary role in review papers when compared to primary research papers which are focused on illustrations. However, illustrations are very important in review articles as they can serve as succinct means of communicating major findings and insights. Franzblau and Chung [ 82 ] pointed out that illustrations serve three major purposes in a scientific article: they simplify complex data and relationships for better understanding, they minimise reading time by summarising and bringing to focus on the key findings (or trends), and last, they help to reduce the overall word count. Hence, inserting and constructing illustrations in a review article is as meticulous as it is important. However, important decisions should be made on whether the charts, figures, or tables to be potentially inserted in the manuscript are indeed needed and how best to design them [ 83 ]. Illustrations should enhance the text while providing necessary information; thus, the information described in illustrations should not contradict that in the main text and should also not be a repetition of texts [ 84 ]. Furthermore, illustrations must be autonomous, meaning they ought to be intelligible without having to read the text portion of the manuscript; thus, the reader does not have to flip back and forth between the illustration and the main text in order to understand it [ 85 ]. It should be noted that tables or figures that directly reiterate the main text or contain extraneous information will only make a mess of the manuscript and discourage readers [ 86 ].
Kotz and Cals [ 87 ] recommend that the layout of tables and figures should be carefully designed in a clear manner with suitable layouts, which will allow them to be referred to logically and chronologically in the text. In addition, illustrations should only contain simple text, as lengthy details would contradict their initial objective, which was to provide simple examples or an overview. Furthermore, the use of abbreviations in illustrations, especially tables, should be avoided if possible. If not, the abbreviations should be defined explicitly in the footnotes or legends of the illustration [ 88 ]. Similarly, numerical values in tables and graphs should also be correctly approximated [ 84 ]. It is recommended that the number of tables and figures in the manuscript should not exceed the target journal's specification. According to Saver [ 89 ], they ideally should not account for more than one-third of the manuscript. Finally, the author(s) must seek permission and give credits for using an already published illustration when necessary. However, none of these are needed if the graphic is originally created by the author, but if it is a reproduced or an adapted illustration, the author must obtain permission from the copyright owner and include the necessary credit. One of the very important tools for designing illustrations is Creative Commons, a platform that provides a wide range of creative works which are available to the public for use and modification.
5.9. Conclusion/Future Perspectives
It has been observed that many reviews end abruptly with a short conclusion; however, a lot more can be included in this section in addition to what has been said in the major sections of the paper. Basically, the conclusion section of a review article should provide a summary of key findings from the main body of the manuscript. In this section, the author needs to revisit the critical points of the paper as well as highlight the accuracy, validity, and relevance of the inferences drawn in the article review. A good conclusion should highlight the relationship between the major points and the author's hypothesis as well as the relationship between the hypothesis and the broader discussion to demonstrate the significance of the review article in a larger context. In addition to giving a concise summary of the important findings that describe current knowledge, the conclusion must also offer a rationale for conducting future research [ 12 ]. Knowledge gaps should be identified, and themes should be logically developed in order to construct conceptual frameworks as well as present a way forward for future research in the field of study [ 11 ].
Furthermore, the author may have to justify the propositions made earlier in the manuscript, demonstrate how the paper extends past research works, and also suggest ways that the expounded theories can be empirically examined [ 3 ]. Unlike experimental studies which can only draw either a positive conclusion or ambiguous failure to reject the null hypothesis, four possible conclusions can be drawn from review articles [ 1 ]. First, the theory/hypothesis propounded may be correct after being proven from current evidence; second, the hypothesis may not be explicitly proven but is most probably the best guess. The third conclusion is that the currently available evidence does not permit a confident conclusion or a best guess, while the last conclusion is that the theory or hypothesis is false [ 1 ]. It is important not to present new information in the conclusion section which has link whatsoever with the rest of the manuscript. According to Harris et al. [ 90 ], the conclusions should, in essence, answer the question: if a reader were to remember one thing about the review, what would it be?
5.10. References
As it has been noted in different parts of this paper, authors must give the required credit to any work or source(s) of information that was included in the review article. This must include the in-text citations in the main body of the paper and the corresponding entries in the reference list. Ideally, this full bibliographical list is the last part of the review article, and it should contain all the books, book chapters, journal articles, reports, and other media, which were utilised in the manuscript. It has been noted that most journals and publishers have their own specific referencing styles which are all derived from the more popular styles such as the American Psychological Association (APA), Chicago, Harvard, Modern Language Association (MLA), and Vancouver styles. However, all these styles may be categorised into either the parenthetical or numerical referencing style. Although a few journals do not have strict referencing rules, it is the responsibility of the author to reference according to the style and instructions of the journal. Omissions and errors must be avoided at all costs, and this can be easily achieved by going over the references many times for due diligence [ 11 ]. According to Cronin et al. [ 12 ], a separate file for references can be created, and any work used in the manuscript can be added to this list immediately after being cited in the text [ 12 ]. In recent times, the emergence of various referencing management software applications such as Endnote, RefWorks, Mendeley, and Zotero has even made referencing easier. The majority of these software applications require little technical expertise, and many of them are free to use, while others may require a subscription. It is imperative, however, that even after using these software packages, the author must manually curate the references during the final draft, in order to avoid any errors, since these programs are not impervious to errors, particularly formatting errors.
6. Concluding Remarks
Writing a review article is a skill that needs to be learned; it is a rigorous but rewarding endeavour as it can provide a useful platform to project the emerging researcher or postgraduate student into the gratifying world of publishing. Thus, the reviewer must develop the ability to think critically, spot patterns in a large volume of information, and must be invested in writing without tiring. The prospective author must also be inspired and dedicated to the successful completion of the article while also ensuring that the review article is not just a mere list or summary of previous research. It is also important that the review process must be focused on the literature and not on the authors; thus, overt criticism of existing research and personal aspersions must be avoided at all costs. All ideas, sentences, words, and illustrations should be constructed in a way to avoid plagiarism; basically, this can be achieved by paraphrasing, summarising, and giving the necessary acknowledgments. Currently, there are many tools to track and detect plagiarism in manuscripts, ensuring that they fall within a reasonable similarity index (which is typically 15% or lower for most journals). Although the more popular of these tools, such as Turnitin and iThenticate, are subscription-based, there are many freely available web-based options as well. An ideal review article is supposed to motivate the research topic and describe its key concepts while delineating the boundaries of research. In this regard, experience-based information on how to methodologically develop acceptable and impactful review articles has been detailed in this paper. Furthermore, for a beginner, this guide has detailed “the why” and “the how” of authoring a good scientific review article. However, the information in this paper may as a whole or in parts be also applicable to other fields of research and to other writing endeavours such as writing literature review in theses, dissertations, and primary research articles. Finally, the intending authors must put all the basic rules of scientific writing and writing in general into cognizance. A comprehensive study of the articles cited within this paper and other related articles focused on scientific writing will further enhance the ability of the motivated beginner to deliver a good review article.
Acknowledgments
This work was supported by the National Research Foundation of South Africa under grant number UID 138097. The authors would like to thank the Durban University of Technology for funding the postdoctoral fellowship of the first author, Dr. Ayodeji Amobonye.
Data Availability
Conflicts of interest.
The authors declare that they have no conflicts of interest.
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Review Paper Format: How To Write A Review Article Fast
This guide aims to demystify the review paper format, presenting practical tips to help you accelerate the writing process.
From understanding the structure to synthesising literature effectively, we’ll explore how to create a compelling review article swiftly, ensuring your work is both impactful and timely.
Whether you’re a seasoned researcher or a budding scholar, these info on review paper format and style will streamline your writing journey.
Research Paper, Review Paper Format
Parts | Notes |
---|---|
Title & Abstract | Sets the stage with a concise title and a descriptive abstract summarising the review’s scope and findings. |
Introduction | Lays the groundwork by presenting the research question, justifying the review’s importance, and highlighting knowledge gaps. |
Methodology | Details the research methods used to select, assess, and synthesise studies, showcasing the review’s rigor and integrity. |
Body | The core section where literature is summarised, analysed, and critiqued, synthesising evidence and presenting arguments with well-structured paragraphs. |
Discussion & Conclusion | Weaves together main points, reflects on the findings’ implications for the field, and suggests future research directions. |
Citation | Acknowledges the scholarly community’s contributions, linking to cited research and enriching the review’s academic discourse. |
What Is A Review Paper?
Diving into the realm of scholarly communication, you might have stumbled upon a research review article.
This unique genre serves to synthesise existing data, offering a panoramic view of the current state of knowledge on a particular topic.
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Unlike a standard research article that presents original experiments, a review paper delves into published literature, aiming to:
- clarify, and
- evaluate previous findings.
Imagine you’re tasked to write a review article. The starting point is often a burning research question. Your mission? To scour various journals, piecing together a well-structured narrative that not only summarises key findings but also identifies gaps in existing literature.
This is where the magic of review writing shines – it’s about creating a roadmap for future research, highlighting areas ripe for exploration.
Review articles come in different flavours, with systematic reviews and meta-analyses being the gold standards. The methodology here is meticulous, with a clear protocol for selecting and evaluating studies.
This rigorous approach ensures that your review is more than just an overview; it’s a critical analysis that adds depth to the understanding of the subject.
Crafting a good review requires mastering the art of citation. Every claim or observation you make needs to be backed by relevant literature. This not only lends credibility to your work but also provides a treasure trove of information for readers eager to delve deeper.
Types Of Review Paper
Not all review articles are created equal. Each type has its methodology, purpose, and format, catering to different research needs and questions. Here’s a couple of types of review paper for you to look at:
Systematic Review Paper
First up is the systematic review, the crème de la crème of review types. It’s known for its rigorous methodology, involving a detailed plan for:
- identifying,
- selecting, and
- critically appraising relevant research.
The aim? To answer a specific research question. Systematic reviews often include meta-analyses , where data from multiple studies are statistically combined to provide more robust conclusions.
This review type is a cornerstone in evidence-based fields like healthcare.
Literature Review Paper
Then there’s the literature review, a broader type you might encounter.
Here, the goal is to give an overview of the main points and debates on a topic, without the stringent methodological framework of a systematic review.
Literature reviews are great for getting a grasp of the field and identifying where future research might head. Often reading literature review papers can help you to learn about a topic rather quickly.
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Narrative Reviews
Narrative reviews allow for a more flexible approach. Authors of narrative reviews draw on existing literature to provide insights or critique a certain area of research.
This is generally done with a less formal structure than systematic reviews. This type is particularly useful for areas where it’s difficult to quantify findings across studies.
Scoping Reviews
Scoping reviews are gaining traction for their ability to map out the existing literature on a broad topic, identifying:
- key concepts,
- theories, and
Unlike systematic reviews, scoping reviews have a more exploratory approach, which can be particularly useful in emerging fields or for topics that haven’t been comprehensively reviewed before.
Each type of review serves a unique purpose and requires a specific skill set. Whether you’re looking to summarise existing findings, synthesise data for evidence-based practice, or explore new research territories, there’s a review type that fits the bill.
Knowing how to write, read, and interpret these reviews can significantly enhance your understanding of any research area.
What Are The Parts In A Review Paper
A review paper format has a pretty set structure, with minor changes here and there to suit the topic covered. The review paper format not only organises your thoughts but also guides your readers through the complexities of your topic.
Title & Abstract
Starting with the title and abstract, you set the stage. The title should be a concise indicator of the content, making it easier for others to quickly tell what your article content is about.
As for the abstract, it should act as a descriptive summary, offering a snapshot of your review’s scope and findings.
Introduction
The introduction lays the groundwork, presenting the research question that drives your review. It’s here you:
- justify the importance of your review,
- delineating the current state of knowledge and
- highlighting gaps.
This section aims to articulate the significance of the topic and your objective in exploring it.
Methodology
The methodology section is the backbone of systematic reviews and meta-analyses, detailing the research methods employed to select, assess, and synthesise studies.
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This transparency allows readers to gauge the rigour and reproducibility of your review. It’s a testament to the integrity of your work, showing how you’ve minimised bias.
The heart of your review lies in the body, where you:
- analyse, and
- critique existing literature .
This is where you synthesise evidence, draw connections, and present both sides of any argument. Well-structured paragraphs and clear subheadings guide readers through your analysis, offering insights and fostering a deeper understanding of the subject.
Discussion & Conclusion
The discussion or conclusion section is where you weave together the main points, reflecting on what your findings mean for the field.
It’s about connecting the dots, offering a synthesis of evidence that answers your initial research question. This part often hints at future research directions, suggesting areas that need further exploration due to gaps in existing knowledge.
Review paper format usually includes the citation list – it is your nod to the scholarly community, acknowledging the contributions of others.
Each citation is a thread in the larger tapestry of academic discourse, enabling readers to delve deeper into the research that has shaped your review.
Tips To Write An Review Article Fast
Writing a review article quickly without sacrificing quality might seem like a tall order, but with the right approach, it’s entirely achievable.
Clearly Define Your Research Question
Clearly define your research question. A focused question not only narrows down the scope of your literature search but also keeps your review concise and on track.
By honing in on a specific aspect of a broader topic, you can avoid the common pitfall of becoming overwhelmed by the vast expanse of available literature. This specificity allows you to zero in on the most relevant studies, making your review more impactful.
Efficient Literature Searching
Utilise databases specific to your field and employ advanced search techniques like Boolean operators. This can drastically reduce the time you spend sifting through irrelevant articles.
Additionally, leveraging citation chains—looking at who has cited a pivotal paper in your area and who it cites—can uncover valuable sources you might otherwise miss.
Organise Your Findings Systematically
Developing a robust organisation strategy is key. As you gather sources, categorize them based on themes or methodologies.
This not only aids in structuring your review but also in identifying areas where research is lacking or abundant. Organize your findings based on the review paper format.
Tools like citation management software can be invaluable here, helping you keep track of your sources and their key points. We list out some of the best AI tools for academic research here.
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Build An Outline Before Writing
Don’t underestimate the power of a well-structured outline. A clear blueprint of your article can guide your writing process, ensuring that each section flows logically into the next.
This roadmap not only speeds up the writing process by providing a clear direction but also helps maintain coherence, ensuring your review article delivers a compelling narrative that advances understanding in your field.
Start Writing With The Easiest Sections
When it’s time to write, start with sections you find easiest. This might be the methodology or a particular thematic section where you feel most confident.
Getting words on the page can build momentum, making it easier to tackle more challenging sections later.
Remember, your first draft doesn’t have to be perfect; the goal is to start articulating your synthesis of the literature.
Learn How To Write An Article Review
Mastering the review paper format is a crucial step towards efficient academic writing. By adhering to the structured components outlined, you can streamline the creation of a compelling review article.
Embracing these guidelines not only speeds up the writing process but also enhances the clarity and impact of your work, ensuring your contributions to scholarly discourse are both valuable and timely.
A review paper serves to synthesise existing data, offering a panoramic view of the current state of knowledge on a particular topic
A Review Paper Format Usually Contains What Sections?
You usually will see sections like introduction, literature review, methodology, analysis and findings, discussions, citation and conclusion.
How To Write A Review Paper Fast?
The key is to organize, pre-plan things out before writing it.
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Dr Andrew Stapleton has a Masters and PhD in Chemistry from the UK and Australia. He has many years of research experience and has worked as a Postdoctoral Fellow and Associate at a number of Universities. Although having secured funding for his own research, he left academia to help others with his YouTube channel all about the inner workings of academia and how to make it work for you.
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What is a Literature Review? How to Write It (with Examples)
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A literature review is a critical analysis and synthesis of existing research on a particular topic. It provides an overview of the current state of knowledge, identifies gaps, and highlights key findings in the literature. 1 The purpose of a literature review is to situate your own research within the context of existing scholarship, demonstrating your understanding of the topic and showing how your work contributes to the ongoing conversation in the field. Learning how to write a literature review is a critical tool for successful research. Your ability to summarize and synthesize prior research pertaining to a certain topic demonstrates your grasp on the topic of study, and assists in the learning process.
Table of Contents
What is the purpose of literature review , a. habitat loss and species extinction: , b. range shifts and phenological changes: , c. ocean acidification and coral reefs: , d. adaptive strategies and conservation efforts: .
- Choose a Topic and Define the Research Question:
- Decide on the Scope of Your Review:
- Select Databases for Searches:
- Conduct Searches and Keep Track:
- Review the Literature:
- Organize and Write Your Literature Review:
- How to write a literature review faster with Paperpal?
Frequently asked questions
What is a literature review .
A well-conducted literature review demonstrates the researcher’s familiarity with the existing literature, establishes the context for their own research, and contributes to scholarly conversations on the topic. One of the purposes of a literature review is also to help researchers avoid duplicating previous work and ensure that their research is informed by and builds upon the existing body of knowledge.
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A literature review serves several important purposes within academic and research contexts. Here are some key objectives and functions of a literature review: 2
1. Contextualizing the Research Problem: The literature review provides a background and context for the research problem under investigation. It helps to situate the study within the existing body of knowledge.
2. Identifying Gaps in Knowledge: By identifying gaps, contradictions, or areas requiring further research, the researcher can shape the research question and justify the significance of the study. This is crucial for ensuring that the new research contributes something novel to the field.
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3. Understanding Theoretical and Conceptual Frameworks: Literature reviews help researchers gain an understanding of the theoretical and conceptual frameworks used in previous studies. This aids in the development of a theoretical framework for the current research.
4. Providing Methodological Insights: Another purpose of literature reviews is that it allows researchers to learn about the methodologies employed in previous studies. This can help in choosing appropriate research methods for the current study and avoiding pitfalls that others may have encountered.
5. Establishing Credibility: A well-conducted literature review demonstrates the researcher’s familiarity with existing scholarship, establishing their credibility and expertise in the field. It also helps in building a solid foundation for the new research.
6. Informing Hypotheses or Research Questions: The literature review guides the formulation of hypotheses or research questions by highlighting relevant findings and areas of uncertainty in existing literature.
Literature review example
Let’s delve deeper with a literature review example: Let’s say your literature review is about the impact of climate change on biodiversity. You might format your literature review into sections such as the effects of climate change on habitat loss and species extinction, phenological changes, and marine biodiversity. Each section would then summarize and analyze relevant studies in those areas, highlighting key findings and identifying gaps in the research. The review would conclude by emphasizing the need for further research on specific aspects of the relationship between climate change and biodiversity. The following literature review template provides a glimpse into the recommended literature review structure and content, demonstrating how research findings are organized around specific themes within a broader topic.
Literature Review on Climate Change Impacts on Biodiversity:
Climate change is a global phenomenon with far-reaching consequences, including significant impacts on biodiversity. This literature review synthesizes key findings from various studies:
Climate change-induced alterations in temperature and precipitation patterns contribute to habitat loss, affecting numerous species (Thomas et al., 2004). The review discusses how these changes increase the risk of extinction, particularly for species with specific habitat requirements.
Observations of range shifts and changes in the timing of biological events (phenology) are documented in response to changing climatic conditions (Parmesan & Yohe, 2003). These shifts affect ecosystems and may lead to mismatches between species and their resources.
The review explores the impact of climate change on marine biodiversity, emphasizing ocean acidification’s threat to coral reefs (Hoegh-Guldberg et al., 2007). Changes in pH levels negatively affect coral calcification, disrupting the delicate balance of marine ecosystems.
Recognizing the urgency of the situation, the literature review discusses various adaptive strategies adopted by species and conservation efforts aimed at mitigating the impacts of climate change on biodiversity (Hannah et al., 2007). It emphasizes the importance of interdisciplinary approaches for effective conservation planning.
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How to write a good literature review
Writing a literature review involves summarizing and synthesizing existing research on a particular topic. A good literature review format should include the following elements.
Introduction: The introduction sets the stage for your literature review, providing context and introducing the main focus of your review.
- Opening Statement: Begin with a general statement about the broader topic and its significance in the field.
- Scope and Purpose: Clearly define the scope of your literature review. Explain the specific research question or objective you aim to address.
- Organizational Framework: Briefly outline the structure of your literature review, indicating how you will categorize and discuss the existing research.
- Significance of the Study: Highlight why your literature review is important and how it contributes to the understanding of the chosen topic.
- Thesis Statement: Conclude the introduction with a concise thesis statement that outlines the main argument or perspective you will develop in the body of the literature review.
Body: The body of the literature review is where you provide a comprehensive analysis of existing literature, grouping studies based on themes, methodologies, or other relevant criteria.
- Organize by Theme or Concept: Group studies that share common themes, concepts, or methodologies. Discuss each theme or concept in detail, summarizing key findings and identifying gaps or areas of disagreement.
- Critical Analysis: Evaluate the strengths and weaknesses of each study. Discuss the methodologies used, the quality of evidence, and the overall contribution of each work to the understanding of the topic.
- Synthesis of Findings: Synthesize the information from different studies to highlight trends, patterns, or areas of consensus in the literature.
- Identification of Gaps: Discuss any gaps or limitations in the existing research and explain how your review contributes to filling these gaps.
- Transition between Sections: Provide smooth transitions between different themes or concepts to maintain the flow of your literature review.
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Conclusion: The conclusion of your literature review should summarize the main findings, highlight the contributions of the review, and suggest avenues for future research.
- Summary of Key Findings: Recap the main findings from the literature and restate how they contribute to your research question or objective.
- Contributions to the Field: Discuss the overall contribution of your literature review to the existing knowledge in the field.
- Implications and Applications: Explore the practical implications of the findings and suggest how they might impact future research or practice.
- Recommendations for Future Research: Identify areas that require further investigation and propose potential directions for future research in the field.
- Final Thoughts: Conclude with a final reflection on the importance of your literature review and its relevance to the broader academic community.
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Conducting a literature review
Conducting a literature review is an essential step in research that involves reviewing and analyzing existing literature on a specific topic. It’s important to know how to do a literature review effectively, so here are the steps to follow: 1
Choose a Topic and Define the Research Question:
- Select a topic that is relevant to your field of study.
- Clearly define your research question or objective. Determine what specific aspect of the topic do you want to explore?
Decide on the Scope of Your Review:
- Determine the timeframe for your literature review. Are you focusing on recent developments, or do you want a historical overview?
- Consider the geographical scope. Is your review global, or are you focusing on a specific region?
- Define the inclusion and exclusion criteria. What types of sources will you include? Are there specific types of studies or publications you will exclude?
Select Databases for Searches:
- Identify relevant databases for your field. Examples include PubMed, IEEE Xplore, Scopus, Web of Science, and Google Scholar.
- Consider searching in library catalogs, institutional repositories, and specialized databases related to your topic.
Conduct Searches and Keep Track:
- Develop a systematic search strategy using keywords, Boolean operators (AND, OR, NOT), and other search techniques.
- Record and document your search strategy for transparency and replicability.
- Keep track of the articles, including publication details, abstracts, and links. Use citation management tools like EndNote, Zotero, or Mendeley to organize your references.
Review the Literature:
- Evaluate the relevance and quality of each source. Consider the methodology, sample size, and results of studies.
- Organize the literature by themes or key concepts. Identify patterns, trends, and gaps in the existing research.
- Summarize key findings and arguments from each source. Compare and contrast different perspectives.
- Identify areas where there is a consensus in the literature and where there are conflicting opinions.
- Provide critical analysis and synthesis of the literature. What are the strengths and weaknesses of existing research?
Organize and Write Your Literature Review:
- Literature review outline should be based on themes, chronological order, or methodological approaches.
- Write a clear and coherent narrative that synthesizes the information gathered.
- Use proper citations for each source and ensure consistency in your citation style (APA, MLA, Chicago, etc.).
- Conclude your literature review by summarizing key findings, identifying gaps, and suggesting areas for future research.
Whether you’re exploring a new research field or finding new angles to develop an existing topic, sifting through hundreds of papers can take more time than you have to spare. But what if you could find science-backed insights with verified citations in seconds? That’s the power of Paperpal’s new Research feature!
How to write a literature review faster with Paperpal?
Paperpal, an AI writing assistant, integrates powerful academic search capabilities within its writing platform. With the Research | Cite feature, you get 100% factual insights, with citations backed by 250M+ verified research articles, directly within your writing interface. It also allows you auto-cite references in 10,000+ styles and save relevant references in your Citation Library. By eliminating the need to switch tabs to find answers to all your research questions, Paperpal saves time and helps you stay focused on your writing.
Here’s how to use the Research feature:
- Ask a question: Get started with a new document on paperpal.com. Click on the “Research | Cite” feature and type your question in plain English. Paperpal will scour over 250 million research articles, including conference papers and preprints, to provide you with accurate insights and citations.
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- Review and Save: Paperpal summarizes the information, while citing sources and listing relevant reads. You can quickly scan the results to identify relevant references and save these directly to your built-in citations library for later access.
- Cite with Confidence: Paperpal makes it easy to incorporate relevant citations and references in 10,000+ styles into your writing, ensuring your arguments are well-supported by credible sources. This translates to a polished, well-researched literature review.
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The literature review sample and detailed advice on writing and conducting a review will help you produce a well-structured report. But remember that a good literature review is an ongoing process, and it may be necessary to revisit and update it as your research progresses. By combining effortless research with an easy citation process, Paperpal Research streamlines the literature review process and empowers you to write faster and with more confidence. Try Paperpal Research now and see for yourself.
A literature review is a critical and comprehensive analysis of existing literature (published and unpublished works) on a specific topic or research question and provides a synthesis of the current state of knowledge in a particular field. A well-conducted literature review is crucial for researchers to build upon existing knowledge, avoid duplication of efforts, and contribute to the advancement of their field. It also helps researchers situate their work within a broader context and facilitates the development of a sound theoretical and conceptual framework for their studies.
Literature review is a crucial component of research writing, providing a solid background for a research paper’s investigation. The aim is to keep professionals up to date by providing an understanding of ongoing developments within a specific field, including research methods, and experimental techniques used in that field, and present that knowledge in the form of a written report. Also, the depth and breadth of the literature review emphasizes the credibility of the scholar in his or her field.
Before writing a literature review, it’s essential to undertake several preparatory steps to ensure that your review is well-researched, organized, and focused. This includes choosing a topic of general interest to you and doing exploratory research on that topic, writing an annotated bibliography, and noting major points, especially those that relate to the position you have taken on the topic.
Literature reviews and academic research papers are essential components of scholarly work but serve different purposes within the academic realm. 3 A literature review aims to provide a foundation for understanding the current state of research on a particular topic, identify gaps or controversies, and lay the groundwork for future research. Therefore, it draws heavily from existing academic sources, including books, journal articles, and other scholarly publications. In contrast, an academic research paper aims to present new knowledge, contribute to the academic discourse, and advance the understanding of a specific research question. Therefore, it involves a mix of existing literature (in the introduction and literature review sections) and original data or findings obtained through research methods.
Literature reviews are essential components of academic and research papers, and various strategies can be employed to conduct them effectively. If you want to know how to write a literature review for a research paper, here are four common approaches that are often used by researchers. Chronological Review: This strategy involves organizing the literature based on the chronological order of publication. It helps to trace the development of a topic over time, showing how ideas, theories, and research have evolved. Thematic Review: Thematic reviews focus on identifying and analyzing themes or topics that cut across different studies. Instead of organizing the literature chronologically, it is grouped by key themes or concepts, allowing for a comprehensive exploration of various aspects of the topic. Methodological Review: This strategy involves organizing the literature based on the research methods employed in different studies. It helps to highlight the strengths and weaknesses of various methodologies and allows the reader to evaluate the reliability and validity of the research findings. Theoretical Review: A theoretical review examines the literature based on the theoretical frameworks used in different studies. This approach helps to identify the key theories that have been applied to the topic and assess their contributions to the understanding of the subject. It’s important to note that these strategies are not mutually exclusive, and a literature review may combine elements of more than one approach. The choice of strategy depends on the research question, the nature of the literature available, and the goals of the review. Additionally, other strategies, such as integrative reviews or systematic reviews, may be employed depending on the specific requirements of the research.
The literature review format can vary depending on the specific publication guidelines. However, there are some common elements and structures that are often followed. Here is a general guideline for the format of a literature review: Introduction: Provide an overview of the topic. Define the scope and purpose of the literature review. State the research question or objective. Body: Organize the literature by themes, concepts, or chronology. Critically analyze and evaluate each source. Discuss the strengths and weaknesses of the studies. Highlight any methodological limitations or biases. Identify patterns, connections, or contradictions in the existing research. Conclusion: Summarize the key points discussed in the literature review. Highlight the research gap. Address the research question or objective stated in the introduction. Highlight the contributions of the review and suggest directions for future research.
Both annotated bibliographies and literature reviews involve the examination of scholarly sources. While annotated bibliographies focus on individual sources with brief annotations, literature reviews provide a more in-depth, integrated, and comprehensive analysis of existing literature on a specific topic. The key differences are as follows:
Annotated Bibliography | Literature Review | |
Purpose | List of citations of books, articles, and other sources with a brief description (annotation) of each source. | Comprehensive and critical analysis of existing literature on a specific topic. |
Focus | Summary and evaluation of each source, including its relevance, methodology, and key findings. | Provides an overview of the current state of knowledge on a particular subject and identifies gaps, trends, and patterns in existing literature. |
Structure | Each citation is followed by a concise paragraph (annotation) that describes the source’s content, methodology, and its contribution to the topic. | The literature review is organized thematically or chronologically and involves a synthesis of the findings from different sources to build a narrative or argument. |
Length | Typically 100-200 words | Length of literature review ranges from a few pages to several chapters |
Independence | Each source is treated separately, with less emphasis on synthesizing the information across sources. | The writer synthesizes information from multiple sources to present a cohesive overview of the topic. |
References
- Denney, A. S., & Tewksbury, R. (2013). How to write a literature review. Journal of criminal justice education , 24 (2), 218-234.
- Pan, M. L. (2016). Preparing literature reviews: Qualitative and quantitative approaches . Taylor & Francis.
- Cantero, C. (2019). How to write a literature review. San José State University Writing Center .
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Literature reviews, what is a literature review, learning more about how to do a literature review.
- Planning the Review
- The Research Question
- Choosing Where to Search
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- Writing the Review
A literature review is a review and synthesis of existing research on a topic or research question. A literature review is meant to analyze the scholarly literature, make connections across writings and identify strengths, weaknesses, trends, and missing conversations. A literature review should address different aspects of a topic as it relates to your research question. A literature review goes beyond a description or summary of the literature you have read.
- Sage Research Methods Core This link opens in a new window SAGE Research Methods supports research at all levels by providing material to guide users through every step of the research process. SAGE Research Methods is the ultimate methods library with more than 1000 books, reference works, journal articles, and instructional videos by world-leading academics from across the social sciences, including the largest collection of qualitative methods books available online from any scholarly publisher. – Publisher
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- GENERAL HUMANITIES PRESS RELEASES
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How to write an academic review? [Originally published in DADOS’ blog in July/2019]
By Luiz Augusto Campos
![research paper academic review](https://blog.scielo.org/en/wp-content/uploads/sites/2/2019/09/dados-300x180.jpg)
Academic journals are nowadays the main pillar of scientific dissemination, production and funding systems. They not only serve to disseminate the ideas and findings of a given research, but, above all, to set patterns of what is a legitimate academic research and, therefore, worthy of prestige and funding.
It is curious, however, that the definition of what should and should not be published depends largely on the work of an anonymous and unpaid group of people: the peer reviewers. In the double-blind peer review system, still hegemonic in the contemporary scientific world, it is the reviewers who most influence the fate of an article.
While alternative models based on open post-publication peer review (preprint) or later disclosure of peer identities as proposed by the PLOS ONE platform are advancing, it appears that the model based on anonymity will not be quickly abdicated. It is noteworthy that, in this model, the reviews also are restricted to the authors of the evaluated paper and journal editors.
For this reason, many scholars, especially at the beginning of their careers, are not quite confident about how to write a review. Without any pretense of exhaustion, the purpose of this post is to outline, in general terms, what a reviewer should consider before writing an assessment. These are a series of norms consolidated over the years in the editorial flow of DADOS and other social science journals.
Why write a review?
Since they are anonymous and private, reviews reward very little credit in terms of academic recognition. Why, then, write them up? First, a review is the main quality control instrument of scientific output and of the minimum standards of this activity. By refusing to grant a review, we are outsourcing this task to others, thus, abdicating the possibility of guaranteeing certain standards of scientific quality.
Second, providing advice is the best way to stay current on a particular field of research. Not all scholars attend every renowned congress in their discipline, but most want to have their ideas published. It is also common for neophytes in a thematic area to make efforts to publish their research. Hence the relevance of reviews as a way of accessing the freshest on a topic.
Third, today’s peer reviewer is tomorrow’s author and vice versa. This means that as authors we expect our peers to be diligent in their evaluations and, therefore, we should be reciprocal. Moreover, it is usual for editors to follow the papers of their most effective reviewers with greater diligence and speed.
Fourth, several systems for evaluating scientific output have incorporated the quality and quantity of review in their metrics. The ScholarOne flow management system, used by many journals, has a module that allows editors to rate reviews and rank reviewers. Some areas of CAPES also consider the review productivity in their scale. Especially since the building of the PLOS ONE platform, based on data from thousands of reviews, it is likely that this activity will be increasingly recognized and studied.
What is the recommended time for accepting and writing a review?
In general, each reviewer is given one month to write their assessment. However, the important thing is to inform editors as soon as possible on your availability, i.e., not to delay acceptance or refusal of the invitation. This is because unanswered invitations remain open, leaving editors in doubt about the availability/willingness of the reviewer and the need to call a second or third name. Therefore, it is mostly recommended to accept the task and request more time to perform it than to postpone it indefinitely.
What if I cannot write a review at all?
The academic routine can indeed be strenuous and, in most cases, it leads to delays in tasks with less tangible rewards. Although there is a wide range of the time each scholar devotes to his or her different activities, it is reasonable to assume that he or she writes a review once every two months, on average. But even where it is in fact impossible to heed an invitation to write a review, reviewers may be helpful by referring other colleagues and experts to perform the task. Therefore, even if unavailable to write a review, the suggestion of other names is welcome.
What makes it a good review?
A good review is one capable of summarizing the characteristics, qualities and flaws of a given academic manuscript taking into account the parameters of a given journal, in order to support the decision of its publication or not by the editors.
It should be pointed out that the reviews are subsidies to the editorial decision and not the decision itself. It is up to the editor and his/her advisers to arbitrate what to do with each paper, especially in the face of conflicting reviews. Hence the importance of avoiding overly synthetic advice such as “the paper is good and should be published” or “the paper is bad and should not be published”. Instead, try to discuss the merits and defects of the manuscript, clearly indicating why they are so assessed and how they express themselves in the paper. It is also recommended that the referee indicates ways for improvement, suggests references and highlights unclear passages.
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What are the possible reviews and what do they mean?
Journals usually provide five possible deliberations in a review:
To approve: The paper could be published as it is, requiring at most a few spelling and grammar revisions, none on the content or structure.
To approve with minor revisions: The paper requires only a few revisions, which in theory can be easily performed by the authors. This encompasses issues of form, lack of some reference, or an unclear argument or excerpt. Nevertheless, it is understood that the paper should be published. Although not mandatory, it is also understood that the reviewer is open to re-evaluate a second version of the manuscript, if it happens to be resubmitted.
To approve with major revisions: The paper requires deeper revisions, but nothing that requires a drastic restructuring. This encompasses more general issues, lack of several relevant references and many unclear arguments. In any case, it is understood that the paper should be published and that the outcome it produced need not be redone. Although not mandatory, it is also understood that the reviewer is open to re-evaluate a second version of the manuscript, if it happens to be resubmitted.
To reject and resubmit: In order for the paper to become publishable and to contribute to its thematic area, its objectives and structure must be substantively modified. This decision assumes that the paper demands profound changes, but that its original intent is viable, legitimate and may result in substantive contributions in the future, hence the incentive for resubmission. Although not mandatory, it is understood that the reviewer is open to re-evaluate a second version, although that may be resubmitted to new reviewers.
To reject: In order for the paper to become publishable and to contribute to its subject area, its objectives and structure must be completely modified. This decision does not assume that the paper “is beyond salvation”, but only that the necessary changes are so drastic that they would result in another paper, if they were to be made.
Am I an overly harsh or lenient reviewer?
Strictly speaking, the vast majority of manuscripts submitted to a quality journal are rejected. So don’t punish yourself if the number of papers you approve is small or far less than the rejected ones. Also remember that your decision is not final, it is up to the editor to ratify, moderate or complement it.
What if I detect any conflict of interest?
In the hypothetical world of blind peer review, reviewers have no clue about the authors’ identity and vice versa. In real life, however, it is common for the topic, style and approach of a given paper to suggest the reviewer its authorship. When this kind of suspicion occurs, the reviewer should assess the extent to which a potential conflict of interest exists, i.e., when the motivation for a given assessment is not only the interest for knowledge advancement, which undermines objectivity and impartiality of his/her deliberation. In such cases, the reviewer should decline the invitation and communicate his/her motivation to the editorial team. Further details on potential conflicts of interest and ethics of scientific assessment can be obtained from the FAPESP Code of Good Scientific Practice 1 .
1. FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO. Code of good scientific practice [online]. FAPESP: Fundação de Amparo à Pesquisa do Estado de São Paulo. 2014 [viewed 12 September 2019]. Available from: http://www.fapesp.br/boaspraticas/FAPESP-Code_of_Good_Scientific_Practice_2014.pdf
External links
Dados – Revista de Ciências Sociais < http://dados.iesp.uerj.br/ >
PLOS ONE < https://journals.plos.org/plosone/ >
About Luiz Augusto Campos
Luiz Augusto Campos is a professor of Sociology and Political Science at IESP-UERJ and editor-in-chief of DADOS, one of the leading Brazilian social science journals, published for over fifty years.
Original article in Portuguese
http://dados.iesp.uerj.br/como-redigir-um-parecer/
Translated from the original in Portuguese by Lilian Nassi-Calò.
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How to Write a Research Paper | A Beginner's Guide
A research paper is a piece of academic writing that provides analysis, interpretation, and argument based on in-depth independent research.
Research papers are similar to academic essays , but they are usually longer and more detailed assignments, designed to assess not only your writing skills but also your skills in scholarly research. Writing a research paper requires you to demonstrate a strong knowledge of your topic, engage with a variety of sources, and make an original contribution to the debate.
This step-by-step guide takes you through the entire writing process, from understanding your assignment to proofreading your final draft.
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Table of contents
Understand the assignment, choose a research paper topic, conduct preliminary research, develop a thesis statement, create a research paper outline, write a first draft of the research paper, write the introduction, write a compelling body of text, write the conclusion, the second draft, the revision process, research paper checklist, free lecture slides.
Completing a research paper successfully means accomplishing the specific tasks set out for you. Before you start, make sure you thoroughly understanding the assignment task sheet:
- Read it carefully, looking for anything confusing you might need to clarify with your professor.
- Identify the assignment goal, deadline, length specifications, formatting, and submission method.
- Make a bulleted list of the key points, then go back and cross completed items off as you’re writing.
Carefully consider your timeframe and word limit: be realistic, and plan enough time to research, write, and edit.
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There are many ways to generate an idea for a research paper, from brainstorming with pen and paper to talking it through with a fellow student or professor.
You can try free writing, which involves taking a broad topic and writing continuously for two or three minutes to identify absolutely anything relevant that could be interesting.
You can also gain inspiration from other research. The discussion or recommendations sections of research papers often include ideas for other specific topics that require further examination.
Once you have a broad subject area, narrow it down to choose a topic that interests you, m eets the criteria of your assignment, and i s possible to research. Aim for ideas that are both original and specific:
- A paper following the chronology of World War II would not be original or specific enough.
- A paper on the experience of Danish citizens living close to the German border during World War II would be specific and could be original enough.
Note any discussions that seem important to the topic, and try to find an issue that you can focus your paper around. Use a variety of sources , including journals, books, and reliable websites, to ensure you do not miss anything glaring.
Do not only verify the ideas you have in mind, but look for sources that contradict your point of view.
- Is there anything people seem to overlook in the sources you research?
- Are there any heated debates you can address?
- Do you have a unique take on your topic?
- Have there been some recent developments that build on the extant research?
In this stage, you might find it helpful to formulate some research questions to help guide you. To write research questions, try to finish the following sentence: “I want to know how/what/why…”
A thesis statement is a statement of your central argument — it establishes the purpose and position of your paper. If you started with a research question, the thesis statement should answer it. It should also show what evidence and reasoning you’ll use to support that answer.
The thesis statement should be concise, contentious, and coherent. That means it should briefly summarize your argument in a sentence or two, make a claim that requires further evidence or analysis, and make a coherent point that relates to every part of the paper.
You will probably revise and refine the thesis statement as you do more research, but it can serve as a guide throughout the writing process. Every paragraph should aim to support and develop this central claim.
Prevent plagiarism. Run a free check.
A research paper outline is essentially a list of the key topics, arguments, and evidence you want to include, divided into sections with headings so that you know roughly what the paper will look like before you start writing.
A structure outline can help make the writing process much more efficient, so it’s worth dedicating some time to create one.
Your first draft won’t be perfect — you can polish later on. Your priorities at this stage are as follows:
- Maintaining forward momentum — write now, perfect later.
- Paying attention to clear organization and logical ordering of paragraphs and sentences, which will help when you come to the second draft.
- Expressing your ideas as clearly as possible, so you know what you were trying to say when you come back to the text.
You do not need to start by writing the introduction. Begin where it feels most natural for you — some prefer to finish the most difficult sections first, while others choose to start with the easiest part. If you created an outline, use it as a map while you work.
Do not delete large sections of text. If you begin to dislike something you have written or find it doesn’t quite fit, move it to a different document, but don’t lose it completely — you never know if it might come in useful later.
Paragraph structure
Paragraphs are the basic building blocks of research papers. Each one should focus on a single claim or idea that helps to establish the overall argument or purpose of the paper.
Example paragraph
George Orwell’s 1946 essay “Politics and the English Language” has had an enduring impact on thought about the relationship between politics and language. This impact is particularly obvious in light of the various critical review articles that have recently referenced the essay. For example, consider Mark Falcoff’s 2009 article in The National Review Online, “The Perversion of Language; or, Orwell Revisited,” in which he analyzes several common words (“activist,” “civil-rights leader,” “diversity,” and more). Falcoff’s close analysis of the ambiguity built into political language intentionally mirrors Orwell’s own point-by-point analysis of the political language of his day. Even 63 years after its publication, Orwell’s essay is emulated by contemporary thinkers.
Citing sources
It’s also important to keep track of citations at this stage to avoid accidental plagiarism . Each time you use a source, make sure to take note of where the information came from.
You can use our free citation generators to automatically create citations and save your reference list as you go.
APA Citation Generator MLA Citation Generator
The research paper introduction should address three questions: What, why, and how? After finishing the introduction, the reader should know what the paper is about, why it is worth reading, and how you’ll build your arguments.
What? Be specific about the topic of the paper, introduce the background, and define key terms or concepts.
Why? This is the most important, but also the most difficult, part of the introduction. Try to provide brief answers to the following questions: What new material or insight are you offering? What important issues does your essay help define or answer?
How? To let the reader know what to expect from the rest of the paper, the introduction should include a “map” of what will be discussed, briefly presenting the key elements of the paper in chronological order.
The major struggle faced by most writers is how to organize the information presented in the paper, which is one reason an outline is so useful. However, remember that the outline is only a guide and, when writing, you can be flexible with the order in which the information and arguments are presented.
One way to stay on track is to use your thesis statement and topic sentences . Check:
- topic sentences against the thesis statement;
- topic sentences against each other, for similarities and logical ordering;
- and each sentence against the topic sentence of that paragraph.
Be aware of paragraphs that seem to cover the same things. If two paragraphs discuss something similar, they must approach that topic in different ways. Aim to create smooth transitions between sentences, paragraphs, and sections.
The research paper conclusion is designed to help your reader out of the paper’s argument, giving them a sense of finality.
Trace the course of the paper, emphasizing how it all comes together to prove your thesis statement. Give the paper a sense of finality by making sure the reader understands how you’ve settled the issues raised in the introduction.
You might also discuss the more general consequences of the argument, outline what the paper offers to future students of the topic, and suggest any questions the paper’s argument raises but cannot or does not try to answer.
You should not :
- Offer new arguments or essential information
- Take up any more space than necessary
- Begin with stock phrases that signal you are ending the paper (e.g. “In conclusion”)
There are four main considerations when it comes to the second draft.
- Check how your vision of the paper lines up with the first draft and, more importantly, that your paper still answers the assignment.
- Identify any assumptions that might require (more substantial) justification, keeping your reader’s perspective foremost in mind. Remove these points if you cannot substantiate them further.
- Be open to rearranging your ideas. Check whether any sections feel out of place and whether your ideas could be better organized.
- If you find that old ideas do not fit as well as you anticipated, you should cut them out or condense them. You might also find that new and well-suited ideas occurred to you during the writing of the first draft — now is the time to make them part of the paper.
The goal during the revision and proofreading process is to ensure you have completed all the necessary tasks and that the paper is as well-articulated as possible. You can speed up the proofreading process by using the AI proofreader .
Global concerns
- Confirm that your paper completes every task specified in your assignment sheet.
- Check for logical organization and flow of paragraphs.
- Check paragraphs against the introduction and thesis statement.
Fine-grained details
Check the content of each paragraph, making sure that:
- each sentence helps support the topic sentence.
- no unnecessary or irrelevant information is present.
- all technical terms your audience might not know are identified.
Next, think about sentence structure , grammatical errors, and formatting . Check that you have correctly used transition words and phrases to show the connections between your ideas. Look for typos, cut unnecessary words, and check for consistency in aspects such as heading formatting and spellings .
Finally, you need to make sure your paper is correctly formatted according to the rules of the citation style you are using. For example, you might need to include an MLA heading or create an APA title page .
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Checklist: Research paper
I have followed all instructions in the assignment sheet.
My introduction presents my topic in an engaging way and provides necessary background information.
My introduction presents a clear, focused research problem and/or thesis statement .
My paper is logically organized using paragraphs and (if relevant) section headings .
Each paragraph is clearly focused on one central idea, expressed in a clear topic sentence .
Each paragraph is relevant to my research problem or thesis statement.
I have used appropriate transitions to clarify the connections between sections, paragraphs, and sentences.
My conclusion provides a concise answer to the research question or emphasizes how the thesis has been supported.
My conclusion shows how my research has contributed to knowledge or understanding of my topic.
My conclusion does not present any new points or information essential to my argument.
I have provided an in-text citation every time I refer to ideas or information from a source.
I have included a reference list at the end of my paper, consistently formatted according to a specific citation style .
I have thoroughly revised my paper and addressed any feedback from my professor or supervisor.
I have followed all formatting guidelines (page numbers, headers, spacing, etc.).
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How to Write Academic Reviews
- What is a review?
- Common problems with academic reviews
- Getting started: approaches to reading and notetaking
- Understanding and analyzing the work
- Organizing and writing the review
What Is a Review?
A scholarly review describes, analyzes, and evaluates an article, book, film, or performance (through this guide we will use the term “work” to refer to the text or piece to be reviewed). A review also shows how a work fits into its disciplines and explains the value or contribution of the work to the field.
Reviews play an important role in scholarship. They give scholars the opportunity to respond to one another’s research, ideas and interpretations. They also provide an up-to-date view of a discipline. We recommend you seek out reviews in current scholarly journals to become familiar with recent scholarship on a topic and to understand the forms review writing takes in your discipline. Published scholarly reviews are helpful models for beginner review-writers. However, we remind you that you are to write your own assessment of the work, not rely on the assessment from a review you found in a journal or on a blog.
As a review-writer, your objective is to:
- understand a work on its own terms (analyze it)
- bring your own knowledge to bear on a work (respond to it)
- critique the work while considering validity, truth, and slant (evaluate it)
- place the work in context (compare it to other works).
Common Problems with Academic Reviews
A review is not a research paper.
Rather than a research paper on the subject of the work,an academic review is an evaluation about the work’s message, strengths, and value. For example, a review of Finis Dunaway’s Seeing Green would not include your own research about media coverage of the environmental movement; instead, your review would assess Dunaway’s argument and its significance to the field.
A review is not a summary
It is important to synthesize the contents and significance of the work you review, but the main purpose of a review is to evaluate, critically analyze, or comment on the text. Keep your summary of the work brief, and make specific references to its message and evidence in your assessment of the work.
A review is not an off-the-cuff, unfair personal response
An effective review must be fair and accurate. It is important to see what is actually in front of you when your first reaction to the tone, argument, or subject of what you are reviewing is extremely negative or positive.
You will present your personal views on the work, but they must be explained and supported with evidence. Rather than writing, “I thought the book was interesting,” you can explain why the book was interesting and how it might offer new insights or important ideas. Further, you can expand on a statement such as “The movie was boring,” by explaining how it failed to interest you and pointing toward specific disappointing moments.
Getting Started: Approaches to Reading and Notetaking
Pre-reading.
Pre-reading helps a reader to see a book as a whole. Often, the acknowledgments, preface, and table of contents of a book offer insights about the book’s purpose and direction. Take time before you begin chapter one to read the introduction and conclusion, examine chapter titles, and to explore the index or references pages.
Read more about strategies for critical and efficient reading
Reverse outline
A reverse outline helps a reader analyze the content and argument of a work of non-fiction. Read each section of a text carefully and write down two things: 1) the main point or idea, and 2) its function in the text. In other words, write down what each section says and what it does. This will help you to see how the author develops their argument and uses evidence for support.
Double-entry notebook
In its simplest form, the double-entry notebook separates a page into two columns. In one column, you make observations about the work. In the other, you note your responses to the work. This notetaking method has two advantages. It forces you to make both sorts of notes — notes about the work and notes about your reaction to the work — and it helps you to distinguish between the two.
Observations | Responses |
---|---|
Based on reader’s knowledge of the world, the topic, the discipline, associations and connections based on discourse conventions. |
Whatever method of notetaking you choose, do take notes, even if these are scribbles in the margin. If you don’t, you might rely too heavily on the words, argument, or order of what you are reviewing when you come to write your review.
Understand and Analyze the Work
It is extremely important to work toward seeing a clear and accurate picture of a work. One approach is to try to suspend your judgment for a while, focusing instead on describing or outlining a text. A student once described this as listening to the author’s voice rather than to their own.
Ask questions to support your understanding of the work.
Questions for Works of Non-Fiction
- What is the subject/topic of the work? What key ideas do you think you should describe in your review?
- What is the thesis, main theme, or main point?
- What major claims or conclusions does the author make? What issues does the work illuminate?
- What is the structure of the work? How does the author build their argument?
- What sources does the author consult? What evidence is used to support claims? Do these sources in any way “predetermine” certain conclusions?
- Is there any claim for which the evidence presented is insufficient or slight? Do any conclusions rest on evidence that may be atypical?
- How is the argument developed? How do the claims relate? What does the conclusion reveal?
Questions for Works of Fiction
- What is the main theme or message? What issues does the book illuminate?
- How does the work proceed? How does the author build their plot?
- What kind of language, descriptions, or sections of plot alert you to the themes and significance of the book?
- What does the conclusion reveal when compared with the beginning?
Read Critically
Being critical does not mean criticizing. It means asking questions and formulating answers. Critical reading is not reading with a “bad attitude.” Critical readers do not reject a text or take a negative approach to it; they inquire about a text, an author, themselves, and the context surrounding all three, and they attempt to understand how and why the author has made the particular choices they have.
Think about the Author
You can often tell a lot about an author by examining a text closely, but sometimes it helps to do a little extra research. Here are some questions about the author that would be useful to keep in mind when you are reading a text critically:
- Who is the author? What else has the author written?
- What does the author do? What experiences of the author’s might influence the writing of this book?
- What is the author’s main purpose or goal for the text? Why did they write it and what do they want to achieve?
- Does the author indicate what contribution the text makes to scholarship or literature? What does the author say about their point of view or method of approaching the subject? In other words, what position does the author take?
Think about Yourself
Because you are doing the interpreting and evaluating of a text, it is important to examine your own perspective, assumptions, and knowledge (positionality) in relation to the text. One way to do this is by writing a position statement that outlines your view of the subject of the work you are reviewing. What do you know, believe, or assume about this subject? What in your life might influence your approach to this text?
Here are some prompts that might help you generate a personal response to a book:
- I agree that ... because ...
- I disagree that ... because ...
- I don’t understand ...
- This reminds me of …
- I’m surprised by …
Another way to examine your thoughts in relation to a text is to note your initial response to the work. Consider your experience of the text – did you like it? Why or why not?
- What did I feel when I read this book? Why?
- How did I experience the style or tone of the author? How would I characterize each?
- What questions would I ask this author if I could?
- For me, what are the three best things about this book? The three worst things? Why?
Consider Context
A reviewer needs to examine the context of the book to arrive at a fair understanding and evaluation of its contents and importance. Context may include the scholarship to which this book responds or the author’s personal motive for writing. Or perhaps the context is simply contemporary society or today’s headlines. It is certainly important to consider how the work relates to the course that requires the review.
Here are some useful questions:
- What are the connections between this work and others on similar subjects? How does it relate to core concepts in my course or my discipline?
- What is the scholarly or social significance of this work? What contribution does it make to our understanding?
- What, of relevance, is missing from the work: certain kinds of evidence or methods of analysis/development? A particular theoretical approach? The experiences of certain groups?
- What other perspectives or conclusions are possible?
Once you have taken the time to thoroughly understand and analyze the work, you will have a clear perspective on its strengths and weaknesses and its value within the field. Take time to categorize your ideas and develop an outline; this will ensure your review is well organized and clear.
Organizing and Writing the Review
A review is organized around an assessment of the work or a focused message about its value to the field. Revisit your notes and consider your responses to your questions from critical reading to develop a clear statement that evaluates the work and provides an explanation for that evaluation.
For example:
X is an important work because it provides a new perspective on . . .
X’s argument is compelling because . . . ; however, it fails to address . . .
Although X claims to . . ., they make assumptions about . . . , which diminishes the impact . . .
This statement or evaluation is presented in the introduction. The body of the review works to support or explain your assessment; organize your key ideas or supporting arguments into paragraphs and use evidence from the book, article, or film to demonstrate how the work is (or is not) effective, compelling, provocative, novel, or informative.
As with all scholarly writing, a well-organized structure supports the clarity of your review. There is not a rigid formula for organization, but you may find the following guidelines to be helpful. Note that reviews do not typically include subheadings; the headings listed here serve to help you think about the main sections of your academic review.
Introduction
Introduce the work, the author (or director/producer), and the points you intend to make about this work. In addition, you should
- give relevant bibliographic information
- give the reader a clear idea of the nature, scope, and significance of the work
- indicate your evaluation of the work in a clear 1-2 sentence thesis statement
Provide background information to help your readers understand the importance of the work or the reasons for your appraisal. Background information could include:
- why the issue examined is of current interest
- other scholarship about this subject
- the author’s perspective, methodology, purpose
- the circumstances under which the book was created
Sample Introduction
Within educational research, much attention has been given to the importance of diversity and equity, and the literature is rife with studies detailing the best ways to create environments that are supportive of diverse students. In “Guidance Matters,” however, Carpenter and Diem (2015) examined these concepts in a less-studied source: policy documents related to leadership training. Using discourse analysis, they explored the ways in which government policies concerning the training of educational administrators discussed issues of diversity and equity. While their innovative methods allowed them to reveal the ways in which current policy promotes superficial platitudes to diversity rather than a deep commitment to promoting social justice, their data analysis left many of their identified themes vague and their discussion did not provide a clear explanation of the applications of their findings.
What works in this sample introduction:
- The nature of the larger issue, how best to create diversity and equity within educational environments, is clearly laid out.
- The paragraph clearly introduces the authors and study being reviewed and succinctly explains how they have addressed the larger issue of equity and diversity in a unique way.
- The paragraph ends with a clear thesis that outlines the strengths and weaknesses of the work.
Summary of the Work
Keep the summary of the work short! A paragraph or two should be sufficient. Summarize its contents very briefly and focus on:
- the purpose of the work
- the main points of the work
- the ideas, themes, or arguments that you will evaluate or discuss in the review
Analysis and Evaluation
Analyze and explain the significance of the main points of the work. Evaluate the work, answering questions such as the following:
- Does the work do what its author claimed it would?
- Is the work valid and accurate?
- How does the work fit into scholarship in the field?
- What are your reasons for agreeing, disagreeing, liking, disliking, believing, disbelieving?
Note that this section will take up the bulk of your review and should be organized into paragraphs. Because this form of writing typically does not use subheadings, strong paragraphing, particularly the use of clear topic sentences, is essential. Read more on paragraphing.
Reviews are informed by your critical reading or viewing of a work; therefore you need to include specific evidence from the work to support your claims about its message and its impact. Your writing and your assessment of the work will be most effective if you paraphrase or summarize the evidence you use, rather than relying on direct quotations. Be sure to follow the rules for citation in your discipline. Read more on paraphrasing and summarizing.
Sample Body Paragraph
One of the strengths of Carpenter and Diem’s (2015) study was innovative use of and nuanced explanation of discourse analysis. Critiquing much of the research on policy for its positivist promises of “value neutral and empirically objective” (p. 518) findings, Carpenter and Diem (2015) argued that discourse theory can provide an important lens through which to view policy and its relationship to educational outcomes. By interrogating the “inscribed discourses of policy making” (p. 518), they showed how policy language constructs particular social meanings of concepts such as diversity and equity. Significantly, this analysis was not simply about the language used within documents; instead, Carpenter and Diem (2015) argued that the language used was directly related to reality. Their “study examine[d] how dominant discourses related to equity, and their concretization within guiding policy documents, may shape the ways in which states, local school districts, and educational leaders are asked to consider these issues in their everyday practice” (Carpenter & Diem, 2015, p. 519). Thus, through the use of discourse theory, Carpenter and Diem (2015) framed policy language, which some might consider abstract or distant from daily life, as directly connected to the experience of educational leaders.
What works in this sample body paragraph:
- The paragraph begins with a clear topic sentence that connects directly to a strength mentioned in the thesis of the review.
- The paragraph provides specific details and examples to support how and why their methods are innovative.
- The direct quotations used are short and properly integrated into the sentences.
The paragraph concludes by explaining the significance of the innovative methods to the larger work.
Conclusion and Recommendation
Give your overall assessment of the work. Explain the larger significance of your assessment. Consider who would benefit from engaging with this work.
How to Write a Research Proposal Paper
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Table of Contents
What is a research proposal paper, why write a research proposal paper.
- How to Plan a Research Proposal Paper
Components of a Research Proposal Paper
Research proposal examples, help & additional resources, this resource page will help you:.
- Learn what a research proposal paper is.
- Understand the importance of writing a research proposal paper.
- Understand the steps in the planning stages of a research proposal paper.
- Identify the components of a research proposal paper.
A research proposal paper:
- includes sufficient information about a research study that you propose to conduct for your thesis (e.g., in an MT, MA, or Ph.D. program) or that you imagine conducting (e.g., in an MEd program). It should help your readers understand the scope, validity, and significance of your proposed study.
- may be a stand-alone paper or one part of a larger research project, depending on the nature of your assignment.
- typically follows the citation format of your field, which at OISE is APA .
Your instructor will provide you with assignment details that can help you determine how much information to include in your research proposal, so you should carefully check your course outline and assignment instructions.
Writing a research proposal allows you to
- develop skills in designing a comprehensive research study;
learn how to identify a research problem that can contribute to advancing knowledge in your field of interest;
further develop skills in finding foundational and relevant literature related to your topic;
critically review, examine, and consider the use of different methods for gathering and analyzing data related to the research problem;
see yourself as an active participant in conducting research in your field of study.
Writing a research proposal paper can help clarify questions you may have before designing your research study. It is helpful to get feedback on your research proposal and edit your work to be able to see what you may need to change in your proposal. The more diverse opinions you receive on your proposal, the better prepared you will be to design a comprehensive research study.
How to Plan your Research Proposal
Before starting your research proposal, you should clarify your ideas and make a plan. Ask yourself these questions and take notes:
What do I want to study?
Why is the topic important? Why is it important to me?
How is the topic significant within the subject areas covered in my class?
What problems will it help solve?
How does it build on research already conducted on the topic?
What exactly should I plan to do to conduct a study on the topic?
It may be helpful to write down your answers to these questions and use them to tell a story about your chosen topic to your classmates or instructor. As you tell your story, write down comments or questions from your listeners. This will help you refine your proposal and research questions.
This is an example of how to start planning and thinking about your research proposal assignment. You will find a student’s notes and ideas about their research proposal topic - "Perspectives on Textual Production, Student Collaboration, and Social Networking Sites”. This example is hyperlinked in the following Resource Page:
A research proposal paper typically includes:
- an introduction
- a theoretical framework
- a literature review
- the methodology
- the implications of the proposed study and conclusion
- references
Start your introduction by giving the reader an overview of your study. Include:
- the research context (in what educational settings do you plan to conduct this study?)
- the research problem, purpose (What do you want to achieve by conducting this study?)
- a brief overview of the literature on your topic and the gap your study hopes to fill
- research questions and sub-questions
- a brief mention of your research method (How do you plan to collect and analyze your data?)
- your personal interest in the topic.
Conclude your introduction by giving your reader a roadmap of your proposal.
To learn more about paper introductions, check How to write Introductions .
A theoretical framework refers to the theories that you will use to interpret both your own data and the literature that has come before. Think about theories as lenses that help you look at your data from different perspectives, beyond just your own personal perspective. Think about the theories that you have come across in your courses or readings that could apply to your research topic. When writing the theoretical framework, include
- A description of where the theories come from (original thinkers), their key components, and how they have developed over time.
- How you plan to use the theories in your study / how they apply to your topic.
The literature review section should help you identify topics or issues that will help contextualize what the research has/hasn’t found and discussed on the topic so far and convince your reader that your proposed study is important. This is where you can go into more detail on the gap that your study hopes to fill. Ultimately, a good literature review helps your reader learn more about the topic that you have chosen to study and what still needs to be researched
To learn more about literature reviews check What is a Literature Review .
The methods section should briefly explain how you plan to conduct your study and why you have chosen a particular method. You may also include
- your overall study design (quantitative, qualitative, mixed methods) and the proposed stages
- your proposed research instruments (e.g. surveys, interviews)
- your proposed participant recruitment channels / document selection criteria
- a description of your proposed study participants (age, gender, etc.).
- how you plan to analyze the data.
You should cite relevant literature on research methods to support your choices.
The conclusion section should include a short summary about the implications and significance of your proposed study by explaining how the possible findings may change the ways educators and/or stakeholders address the issues identified in your introduction.
Depending on the assignment instructions, the conclusion can also highlight next steps and a timeline for the research process.
To learn more about paper conclusions, check How to write Conclusions .
List all references you used and format them according to APA style. Make sure that everything in your reference list is cited in the paper, and every citation in your paper is in your reference list.
To learn more about writing citations and references, check Citations & APA .
These are detailed guidelines on how to prepare a quantitative research proposal. Adapted from the course APD2293 “Interpretation of Educational Research”. These guidelines are hyperlinked in the following Resource Page:
Related Resource Pages on ASH
- What is a Literature Review?
- How to Prepare a Literature Review
- How to Understand & Plan Assignments
- Citations and APA Style
- How to Integrate Others' Research into your Writing
- How to Write Introductions
- How to Write Conclusions
Additional Resources
- Writing a research proposal– University of Southern California
- Owl Purdue-Graduate-Specific Genres-Purdue University
- 10 Tips for Writing a research proposal – McGill University
On Campus Services
- Book a writing consultation (OSSC)
- Book a Research Consultation (OISE Library)
Peer Reviewed
GPT-fabricated scientific papers on Google Scholar: Key features, spread, and implications for preempting evidence manipulation
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Academic journals, archives, and repositories are seeing an increasing number of questionable research papers clearly produced using generative AI. They are often created with widely available, general-purpose AI applications, most likely ChatGPT, and mimic scientific writing. Google Scholar easily locates and lists these questionable papers alongside reputable, quality-controlled research. Our analysis of a selection of questionable GPT-fabricated scientific papers found in Google Scholar shows that many are about applied, often controversial topics susceptible to disinformation: the environment, health, and computing. The resulting enhanced potential for malicious manipulation of society’s evidence base, particularly in politically divisive domains, is a growing concern.
Swedish School of Library and Information Science, University of Borås, Sweden
Department of Arts and Cultural Sciences, Lund University, Sweden
Division of Environmental Communication, Swedish University of Agricultural Sciences, Sweden
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Research Questions
- Where are questionable publications produced with generative pre-trained transformers (GPTs) that can be found via Google Scholar published or deposited?
- What are the main characteristics of these publications in relation to predominant subject categories?
- How are these publications spread in the research infrastructure for scholarly communication?
- How is the role of the scholarly communication infrastructure challenged in maintaining public trust in science and evidence through inappropriate use of generative AI?
research note Summary
- A sample of scientific papers with signs of GPT-use found on Google Scholar was retrieved, downloaded, and analyzed using a combination of qualitative coding and descriptive statistics. All papers contained at least one of two common phrases returned by conversational agents that use large language models (LLM) like OpenAI’s ChatGPT. Google Search was then used to determine the extent to which copies of questionable, GPT-fabricated papers were available in various repositories, archives, citation databases, and social media platforms.
- Roughly two-thirds of the retrieved papers were found to have been produced, at least in part, through undisclosed, potentially deceptive use of GPT. The majority (57%) of these questionable papers dealt with policy-relevant subjects (i.e., environment, health, computing), susceptible to influence operations. Most were available in several copies on different domains (e.g., social media, archives, and repositories).
- Two main risks arise from the increasingly common use of GPT to (mass-)produce fake, scientific publications. First, the abundance of fabricated “studies” seeping into all areas of the research infrastructure threatens to overwhelm the scholarly communication system and jeopardize the integrity of the scientific record. A second risk lies in the increased possibility that convincingly scientific-looking content was in fact deceitfully created with AI tools and is also optimized to be retrieved by publicly available academic search engines, particularly Google Scholar. However small, this possibility and awareness of it risks undermining the basis for trust in scientific knowledge and poses serious societal risks.
Implications
The use of ChatGPT to generate text for academic papers has raised concerns about research integrity. Discussion of this phenomenon is ongoing in editorials, commentaries, opinion pieces, and on social media (Bom, 2023; Stokel-Walker, 2024; Thorp, 2023). There are now several lists of papers suspected of GPT misuse, and new papers are constantly being added. 1 See for example Academ-AI, https://www.academ-ai.info/ , and Retraction Watch, https://retractionwatch.com/papers-and-peer-reviews-with-evidence-of-chatgpt-writing/ . While many legitimate uses of GPT for research and academic writing exist (Huang & Tan, 2023; Kitamura, 2023; Lund et al., 2023), its undeclared use—beyond proofreading—has potentially far-reaching implications for both science and society, but especially for their relationship. It, therefore, seems important to extend the discussion to one of the most accessible and well-known intermediaries between science, but also certain types of misinformation, and the public, namely Google Scholar, also in response to the legitimate concerns that the discussion of generative AI and misinformation needs to be more nuanced and empirically substantiated (Simon et al., 2023).
Google Scholar, https://scholar.google.com , is an easy-to-use academic search engine. It is available for free, and its index is extensive (Gusenbauer & Haddaway, 2020). It is also often touted as a credible source for academic literature and even recommended in library guides, by media and information literacy initiatives, and fact checkers (Tripodi et al., 2023). However, Google Scholar lacks the transparency and adherence to standards that usually characterize citation databases. Instead, Google Scholar uses automated crawlers, like Google’s web search engine (Martín-Martín et al., 2021), and the inclusion criteria are based on primarily technical standards, allowing any individual author—with or without scientific affiliation—to upload papers to be indexed (Google Scholar Help, n.d.). It has been shown that Google Scholar is susceptible to manipulation through citation exploits (Antkare, 2020) and by providing access to fake scientific papers (Dadkhah et al., 2017). A large part of Google Scholar’s index consists of publications from established scientific journals or other forms of quality-controlled, scholarly literature. However, the index also contains a large amount of gray literature, including student papers, working papers, reports, preprint servers, and academic networking sites, as well as material from so-called “questionable” academic journals, including paper mills. The search interface does not offer the possibility to filter the results meaningfully by material type, publication status, or form of quality control, such as limiting the search to peer-reviewed material.
To understand the occurrence of ChatGPT (co-)authored work in Google Scholar’s index, we scraped it for publications, including one of two common ChatGPT responses (see Appendix A) that we encountered on social media and in media reports (DeGeurin, 2024). The results of our descriptive statistical analyses showed that around 62% did not declare the use of GPTs. Most of these GPT-fabricated papers were found in non-indexed journals and working papers, but some cases included research published in mainstream scientific journals and conference proceedings. 2 Indexed journals mean scholarly journals indexed by abstract and citation databases such as Scopus and Web of Science, where the indexation implies journals with high scientific quality. Non-indexed journals are journals that fall outside of this indexation. More than half (57%) of these GPT-fabricated papers concerned policy-relevant subject areas susceptible to influence operations. To avoid increasing the visibility of these publications, we abstained from referencing them in this research note. However, we have made the data available in the Harvard Dataverse repository.
The publications were related to three issue areas—health (14.5%), environment (19.5%) and computing (23%)—with key terms such “healthcare,” “COVID-19,” or “infection”for health-related papers, and “analysis,” “sustainable,” and “global” for environment-related papers. In several cases, the papers had titles that strung together general keywords and buzzwords, thus alluding to very broad and current research. These terms included “biology,” “telehealth,” “climate policy,” “diversity,” and “disrupting,” to name just a few. While the study’s scope and design did not include a detailed analysis of which parts of the articles included fabricated text, our dataset did contain the surrounding sentences for each occurrence of the suspicious phrases that formed the basis for our search and subsequent selection. Based on that, we can say that the phrases occurred in most sections typically found in scientific publications, including the literature review, methods, conceptual and theoretical frameworks, background, motivation or societal relevance, and even discussion. This was confirmed during the joint coding, where we read and discussed all articles. It became clear that not just the text related to the telltale phrases was created by GPT, but that almost all articles in our sample of questionable articles likely contained traces of GPT-fabricated text everywhere.
Evidence hacking and backfiring effects
Generative pre-trained transformers (GPTs) can be used to produce texts that mimic scientific writing. These texts, when made available online—as we demonstrate—leak into the databases of academic search engines and other parts of the research infrastructure for scholarly communication. This development exacerbates problems that were already present with less sophisticated text generators (Antkare, 2020; Cabanac & Labbé, 2021). Yet, the public release of ChatGPT in 2022, together with the way Google Scholar works, has increased the likelihood of lay people (e.g., media, politicians, patients, students) coming across questionable (or even entirely GPT-fabricated) papers and other problematic research findings. Previous research has emphasized that the ability to determine the value and status of scientific publications for lay people is at stake when misleading articles are passed off as reputable (Haider & Åström, 2017) and that systematic literature reviews risk being compromised (Dadkhah et al., 2017). It has also been highlighted that Google Scholar, in particular, can be and has been exploited for manipulating the evidence base for politically charged issues and to fuel conspiracy narratives (Tripodi et al., 2023). Both concerns are likely to be magnified in the future, increasing the risk of what we suggest calling evidence hacking —the strategic and coordinated malicious manipulation of society’s evidence base.
The authority of quality-controlled research as evidence to support legislation, policy, politics, and other forms of decision-making is undermined by the presence of undeclared GPT-fabricated content in publications professing to be scientific. Due to the large number of archives, repositories, mirror sites, and shadow libraries to which they spread, there is a clear risk that GPT-fabricated, questionable papers will reach audiences even after a possible retraction. There are considerable technical difficulties involved in identifying and tracing computer-fabricated papers (Cabanac & Labbé, 2021; Dadkhah et al., 2023; Jones, 2024), not to mention preventing and curbing their spread and uptake.
However, as the rise of the so-called anti-vaxx movement during the COVID-19 pandemic and the ongoing obstruction and denial of climate change show, retracting erroneous publications often fuels conspiracies and increases the following of these movements rather than stopping them. To illustrate this mechanism, climate deniers frequently question established scientific consensus by pointing to other, supposedly scientific, studies that support their claims. Usually, these are poorly executed, not peer-reviewed, based on obsolete data, or even fraudulent (Dunlap & Brulle, 2020). A similar strategy is successful in the alternative epistemic world of the global anti-vaccination movement (Carrion, 2018) and the persistence of flawed and questionable publications in the scientific record already poses significant problems for health research, policy, and lawmakers, and thus for society as a whole (Littell et al., 2024). Considering that a person’s support for “doing your own research” is associated with increased mistrust in scientific institutions (Chinn & Hasell, 2023), it will be of utmost importance to anticipate and consider such backfiring effects already when designing a technical solution, when suggesting industry or legal regulation, and in the planning of educational measures.
Recommendations
Solutions should be based on simultaneous considerations of technical, educational, and regulatory approaches, as well as incentives, including social ones, across the entire research infrastructure. Paying attention to how these approaches and incentives relate to each other can help identify points and mechanisms for disruption. Recognizing fraudulent academic papers must happen alongside understanding how they reach their audiences and what reasons there might be for some of these papers successfully “sticking around.” A possible way to mitigate some of the risks associated with GPT-fabricated scholarly texts finding their way into academic search engine results would be to provide filtering options for facets such as indexed journals, gray literature, peer-review, and similar on the interface of publicly available academic search engines. Furthermore, evaluation tools for indexed journals 3 Such as LiU Journal CheckUp, https://ep.liu.se/JournalCheckup/default.aspx?lang=eng . could be integrated into the graphical user interfaces and the crawlers of these academic search engines. To enable accountability, it is important that the index (database) of such a search engine is populated according to criteria that are transparent, open to scrutiny, and appropriate to the workings of science and other forms of academic research. Moreover, considering that Google Scholar has no real competitor, there is a strong case for establishing a freely accessible, non-specialized academic search engine that is not run for commercial reasons but for reasons of public interest. Such measures, together with educational initiatives aimed particularly at policymakers, science communicators, journalists, and other media workers, will be crucial to reducing the possibilities for and effects of malicious manipulation or evidence hacking. It is important not to present this as a technical problem that exists only because of AI text generators but to relate it to the wider concerns in which it is embedded. These range from a largely dysfunctional scholarly publishing system (Haider & Åström, 2017) and academia’s “publish or perish” paradigm to Google’s near-monopoly and ideological battles over the control of information and ultimately knowledge. Any intervention is likely to have systemic effects; these effects need to be considered and assessed in advance and, ideally, followed up on.
Our study focused on a selection of papers that were easily recognizable as fraudulent. We used this relatively small sample as a magnifying glass to examine, delineate, and understand a problem that goes beyond the scope of the sample itself, which however points towards larger concerns that require further investigation. The work of ongoing whistleblowing initiatives 4 Such as Academ-AI, https://www.academ-ai.info/ , and Retraction Watch, https://retractionwatch.com/papers-and-peer-reviews-with-evidence-of-chatgpt-writing/ . , recent media reports of journal closures (Subbaraman, 2024), or GPT-related changes in word use and writing style (Cabanac et al., 2021; Stokel-Walker, 2024) suggest that we only see the tip of the iceberg. There are already more sophisticated cases (Dadkhah et al., 2023) as well as cases involving fabricated images (Gu et al., 2022). Our analysis shows that questionable and potentially manipulative GPT-fabricated papers permeate the research infrastructure and are likely to become a widespread phenomenon. Our findings underline that the risk of fake scientific papers being used to maliciously manipulate evidence (see Dadkhah et al., 2017) must be taken seriously. Manipulation may involve undeclared automatic summaries of texts, inclusion in literature reviews, explicit scientific claims, or the concealment of errors in studies so that they are difficult to detect in peer review. However, the mere possibility of these things happening is a significant risk in its own right that can be strategically exploited and will have ramifications for trust in and perception of science. Society’s methods of evaluating sources and the foundations of media and information literacy are under threat and public trust in science is at risk of further erosion, with far-reaching consequences for society in dealing with information disorders. To address this multifaceted problem, we first need to understand why it exists and proliferates.
Finding 1: 139 GPT-fabricated, questionable papers were found and listed as regular results on the Google Scholar results page. Non-indexed journals dominate.
Most questionable papers we found were in non-indexed journals or were working papers, but we did also find some in established journals, publications, conferences, and repositories. We found a total of 139 papers with a suspected deceptive use of ChatGPT or similar LLM applications (see Table 1). Out of these, 19 were in indexed journals, 89 were in non-indexed journals, 19 were student papers found in university databases, and 12 were working papers (mostly in preprint databases). Table 1 divides these papers into categories. Health and environment papers made up around 34% (47) of the sample. Of these, 66% were present in non-indexed journals.
Indexed journals* | 5 | 3 | 4 | 7 | 19 |
Non-indexed journals | 18 | 18 | 13 | 40 | 89 |
Student papers | 4 | 3 | 1 | 11 | 19 |
Working papers | 5 | 3 | 2 | 2 | 12 |
Total | 32 | 27 | 20 | 60 | 139 |
Finding 2: GPT-fabricated, questionable papers are disseminated online, permeating the research infrastructure for scholarly communication, often in multiple copies. Applied topics with practical implications dominate.
The 20 papers concerning health-related issues are distributed across 20 unique domains, accounting for 46 URLs. The 27 papers dealing with environmental issues can be found across 26 unique domains, accounting for 56 URLs. Most of the identified papers exist in multiple copies and have already spread to several archives, repositories, and social media. It would be difficult, or impossible, to remove them from the scientific record.
As apparent from Table 2, GPT-fabricated, questionable papers are seeping into most parts of the online research infrastructure for scholarly communication. Platforms on which identified papers have appeared include ResearchGate, ORCiD, Journal of Population Therapeutics and Clinical Pharmacology (JPTCP), Easychair, Frontiers, the Institute of Electrical and Electronics Engineer (IEEE), and X/Twitter. Thus, even if they are retracted from their original source, it will prove very difficult to track, remove, or even just mark them up on other platforms. Moreover, unless regulated, Google Scholar will enable their continued and most likely unlabeled discoverability.
Environment | researchgate.net (13) | orcid.org (4) | easychair.org (3) | ijope.com* (3) | publikasiindonesia.id (3) |
Health | researchgate.net (15) | ieee.org (4) | twitter.com (3) | jptcp.com** (2) | frontiersin.org (2) |
A word rain visualization (Centre for Digital Humanities Uppsala, 2023), which combines word prominences through TF-IDF 5 Term frequency–inverse document frequency , a method for measuring the significance of a word in a document compared to its frequency across all documents in a collection. scores with semantic similarity of the full texts of our sample of GPT-generated articles that fall into the “Environment” and “Health” categories, reflects the two categories in question. However, as can be seen in Figure 1, it also reveals overlap and sub-areas. The y-axis shows word prominences through word positions and font sizes, while the x-axis indicates semantic similarity. In addition to a certain amount of overlap, this reveals sub-areas, which are best described as two distinct events within the word rain. The event on the left bundles terms related to the development and management of health and healthcare with “challenges,” “impact,” and “potential of artificial intelligence”emerging as semantically related terms. Terms related to research infrastructures, environmental, epistemic, and technological concepts are arranged further down in the same event (e.g., “system,” “climate,” “understanding,” “knowledge,” “learning,” “education,” “sustainable”). A second distinct event further to the right bundles terms associated with fish farming and aquatic medicinal plants, highlighting the presence of an aquaculture cluster. Here, the prominence of groups of terms such as “used,” “model,” “-based,” and “traditional” suggests the presence of applied research on these topics. The two events making up the word rain visualization, are linked by a less dominant but overlapping cluster of terms related to “energy” and “water.”
![research paper academic review](https://misinforeview.hks.harvard.edu/wp-content/uploads/2024/09/figure-1.png)
The bar chart of the terms in the paper subset (see Figure 2) complements the word rain visualization by depicting the most prominent terms in the full texts along the y-axis. Here, word prominences across health and environment papers are arranged descendingly, where values outside parentheses are TF-IDF values (relative frequencies) and values inside parentheses are raw term frequencies (absolute frequencies).
![research paper academic review](https://misinforeview.hks.harvard.edu/wp-content/uploads/2024/09/figure-2.png)
Finding 3: Google Scholar presents results from quality-controlled and non-controlled citation databases on the same interface, providing unfiltered access to GPT-fabricated questionable papers.
Google Scholar’s central position in the publicly accessible scholarly communication infrastructure, as well as its lack of standards, transparency, and accountability in terms of inclusion criteria, has potentially serious implications for public trust in science. This is likely to exacerbate the already-known potential to exploit Google Scholar for evidence hacking (Tripodi et al., 2023) and will have implications for any attempts to retract or remove fraudulent papers from their original publication venues. Any solution must consider the entirety of the research infrastructure for scholarly communication and the interplay of different actors, interests, and incentives.
We searched and scraped Google Scholar using the Python library Scholarly (Cholewiak et al., 2023) for papers that included specific phrases known to be common responses from ChatGPT and similar applications with the same underlying model (GPT3.5 or GPT4): “as of my last knowledge update” and/or “I don’t have access to real-time data” (see Appendix A). This facilitated the identification of papers that likely used generative AI to produce text, resulting in 227 retrieved papers. The papers’ bibliographic information was automatically added to a spreadsheet and downloaded into Zotero. 6 An open-source reference manager, https://zotero.org .
We employed multiple coding (Barbour, 2001) to classify the papers based on their content. First, we jointly assessed whether the paper was suspected of fraudulent use of ChatGPT (or similar) based on how the text was integrated into the papers and whether the paper was presented as original research output or the AI tool’s role was acknowledged. Second, in analyzing the content of the papers, we continued the multiple coding by classifying the fraudulent papers into four categories identified during an initial round of analysis—health, environment, computing, and others—and then determining which subjects were most affected by this issue (see Table 1). Out of the 227 retrieved papers, 88 papers were written with legitimate and/or declared use of GPTs (i.e., false positives, which were excluded from further analysis), and 139 papers were written with undeclared and/or fraudulent use (i.e., true positives, which were included in further analysis). The multiple coding was conducted jointly by all authors of the present article, who collaboratively coded and cross-checked each other’s interpretation of the data simultaneously in a shared spreadsheet file. This was done to single out coding discrepancies and settle coding disagreements, which in turn ensured methodological thoroughness and analytical consensus (see Barbour, 2001). Redoing the category coding later based on our established coding schedule, we achieved an intercoder reliability (Cohen’s kappa) of 0.806 after eradicating obvious differences.
The ranking algorithm of Google Scholar prioritizes highly cited and older publications (Martín-Martín et al., 2016). Therefore, the position of the articles on the search engine results pages was not particularly informative, considering the relatively small number of results in combination with the recency of the publications. Only the query “as of my last knowledge update” had more than two search engine result pages. On those, questionable articles with undeclared use of GPTs were evenly distributed across all result pages (min: 4, max: 9, mode: 8), with the proportion of undeclared use being slightly higher on average on later search result pages.
To understand how the papers making fraudulent use of generative AI were disseminated online, we programmatically searched for the paper titles (with exact string matching) in Google Search from our local IP address (see Appendix B) using the googlesearch – python library(Vikramaditya, 2020). We manually verified each search result to filter out false positives—results that were not related to the paper—and then compiled the most prominent URLs by field. This enabled the identification of other platforms through which the papers had been spread. We did not, however, investigate whether copies had spread into SciHub or other shadow libraries, or if they were referenced in Wikipedia.
We used descriptive statistics to count the prevalence of the number of GPT-fabricated papers across topics and venues and top domains by subject. The pandas software library for the Python programming language (The pandas development team, 2024) was used for this part of the analysis. Based on the multiple coding, paper occurrences were counted in relation to their categories, divided into indexed journals, non-indexed journals, student papers, and working papers. The schemes, subdomains, and subdirectories of the URL strings were filtered out while top-level domains and second-level domains were kept, which led to normalizing domain names. This, in turn, allowed the counting of domain frequencies in the environment and health categories. To distinguish word prominences and meanings in the environment and health-related GPT-fabricated questionable papers, a semantically-aware word cloud visualization was produced through the use of a word rain (Centre for Digital Humanities Uppsala, 2023) for full-text versions of the papers. Font size and y-axis positions indicate word prominences through TF-IDF scores for the environment and health papers (also visualized in a separate bar chart with raw term frequencies in parentheses), and words are positioned along the x-axis to reflect semantic similarity (Skeppstedt et al., 2024), with an English Word2vec skip gram model space (Fares et al., 2017). An English stop word list was used, along with a manually produced list including terms such as “https,” “volume,” or “years.”
- Artificial Intelligence
- / Search engines
Cite this Essay
Haider, J., Söderström, K. R., Ekström, B., & Rödl, M. (2024). GPT-fabricated scientific papers on Google Scholar: Key features, spread, and implications for preempting evidence manipulation. Harvard Kennedy School (HKS) Misinformation Review . https://doi.org/10.37016/mr-2020-156
- / Appendix B
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This research has been supported by Mistra, the Swedish Foundation for Strategic Environmental Research, through the research program Mistra Environmental Communication (Haider, Ekström, Rödl) and the Marcus and Amalia Wallenberg Foundation [2020.0004] (Söderström).
Competing Interests
The authors declare no competing interests.
The research described in this article was carried out under Swedish legislation. According to the relevant EU and Swedish legislation (2003:460) on the ethical review of research involving humans (“Ethical Review Act”), the research reported on here is not subject to authorization by the Swedish Ethical Review Authority (“etikprövningsmyndigheten”) (SRC, 2017).
This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author and source are properly credited.
Data Availability
All data needed to replicate this study are available at the Harvard Dataverse: https://doi.org/10.7910/DVN/WUVD8X
Acknowledgements
The authors wish to thank two anonymous reviewers for their valuable comments on the article manuscript as well as the editorial group of Harvard Kennedy School (HKS) Misinformation Review for their thoughtful feedback and input.
Risk and Influencing Factors for School Absenteeism among Students on the Autism Spectrum—A Systematic Review
- Review Paper
- Open access
- Published: 05 September 2024
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- Isabella Sasso ORCID: orcid.org/0009-0007-0726-0939 1 &
- Teresa Sansour 1
School plays an important role in the development of a child. The impact of school absenteeism extends beyond academic achievement, affecting one's ability to participate in life successfully. In particular, children with difficulties in communication and interaction are at risk of developing school absences. This systematic review therefore focused on school absenteeism among children on the autism spectrum and examined the risk and influencing factors contributing to school absences. Eighteen studies were included, thirteen of which used a quantitative design, two of which were mixed-method studies, and three of which had a qualitative design. Different studies had varying definitions of school absenteeism and employed diverse study designs, prompting the need for a narrative synthesis. We evaluated the data regarding the factors of individual, parental, and school based on the KiTes bioecological systems framework for school attendance and absence by Melvin et al. (2019). We identified the majority of risks and influences in relation to the school factor and identified interacting factors contributing to school absenteeism in all factors. We recognised research gaps and provided guidance for further research.
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Risk Factors for School Absenteeism and Dropout: A Meta-Analytic Review
Child and parental mental health as correlates of school non-attendance and school refusal in children on the autism spectrum.
Avoid common mistakes on your manuscript.
Introduction
When children and youth attend school, they have access to education, a right proclaimed in Article 28 of the United Nations Convention on the Rights of the Child (The United Nations, 1989 ). School education fundamentally contributes to the cognitive, social, and emotional development of children and young people while simultaneously fulfilling essential social tasks (Pellegrini, 2007 ). Accordingly, absences from school have enormous consequences not only for educational success but also for emotional and social development and successful participation in life. School absenteeism increases the risk of all forms of mental illness (Lenzen et al., 2013 ; Melvin et al., 2019 ). Absences can cause distress in families (Gallé-Tessonneau & Heyne, 2020 ) and challenge professionals and resources (Wilson et al., 2008 ; Finning et al., 2019 ).
Defining School Absenteeism
In international research, scholars utilise a range of terms and criteria to assess school absenteeism. Consequently, it's imperative to interpret and compare research findings within this context. For the scope of this review, we employ the term 'school absenteeism' as an overarching concept. Absenteeism, broadly defined, refers to a student's absence from school for any reason, encompassing various forms of non-attendance (Kearney, 2016 ).
A distinction exists between problematic and non-problematic absences. Non-problematic absences may result from factors such as illness, bereavement, or other causes. However, even initially non-problematic or technically excused absences can transition into problematic ones if more than 10% of lessons are missed (Heyne et al., 2019 ; Lenzen et al., 2013 ), or if the child's development is compromised by the absence, leading to decreased grades or challenges in reintegrating into the academic environment (Kearney, 2016 ). Hence, Kearney ( 2003 ) defines non-problematic absenteeism as short- or long-term absences mutually agreed upon by parents and the school, with the possibility of compensatory measures. Additional terms for distinguishing between problematic and non-problematic absences include unexcused/excused, unauthorised/authorised (Gentle-Genitty et al., 2015 ), and illegitimate/legitimate (Kearney, 2003 ).
Heyne et al. ( 2019 ) differentiates four types of problematic absenteeism:
School refusal is defined as non-attendance at school due to emotional stress related to school attendance, where the parents are informed of absences and make reasonable efforts to ensure the child's attendance at school.
School withdrawal is defined as non-attendance with the knowledge of the parents or withholding by the parents.
Truancy includes absence without permission from the school and the parents. In addition, there are efforts to hide truancy from parents.
In the case of school exclusion , the school initiates the absence, for example, as a disciplinary action.
Kearney et al. ( 2019 ) intend to categorise heterogeneous concepts and provide general descriptions of common terms. School refusal must be distinguished from school refusal behaviour . While school refusal involves absence from school, school refusal behaviour is a broader term for various behaviour patterns based on the goal of avoiding school, whether anxiety-related or not (Kearney, 2016 ). School avoidance refers to an absence based on anxiety related to school. Most of these terms refer to an absence initiated by the individual, while school exclusion is initiated by the school, and school withdrawal is parent-initiated (Kearney et al., 2019 ).
Risk and Influencing Factors for School Absenteeism
To identify factors increasing the likelihood of experiencing school absenteeism, various system levels must be considered (Kearney, 2008 ). Melvin et al. ( 2019 ) propose a multilevel approach that applies Bronfenbrenner’s bio-ecological model to the factors associated with school absenteeism.
At the micro- and meso-system levels, factors such as the individual, parental/family, and school levels have been demonstrated to be associated with school attendance. Knowledge of these factors and their interactions can contribute to an understanding of school absenteeism (Melvin et al., 2019 ) (Fig. 1 ).
![research paper academic review figure 1](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs40489-024-00474-x/MediaObjects/40489_2024_474_Fig1_HTML.png)
The KiTeS bioecological systems framework for school attendance and absence (Melvin et al., 2019 )
To categorise different types of absenteeism according to their initiation and relationship to the individual, the school, and the parental level, we constructed Fig. 2 . The categorisation is based on comprehensive research regarding different types of school absenteeism and their relation (Heyne et al., 2019 ; Kearney, 2008 ; Reissner et al., 2019 ; Tonge & Silverman, 2019 ).
![research paper academic review figure 2](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs40489-024-00474-x/MediaObjects/40489_2024_474_Fig2_HTML.png)
Categorisation of absenteeism types based on individual, school, and parental levels
Defining Autism
The World Health Organisation (WHO, 2023 ) categorises “Autism Spectrum Disorder” (ASD) as a neurodevelopmental disorder characterised by “persistent deficits in the ability to initiate and to sustain reciprocal social interaction and social communication”. Another criterion implies “a range of restricted, repetitive, and inflexible patterns of behaviour, interests or activities that are clearly atypical or excessive for the individual’s age and sociocultural context”. The onset is typically in early childhood, but symptoms may manifest when social demands increase. Since there is a surge in social demands at school age, coping with developmental tasks becomes even more difficult, and special support is often needed (Kamp-Becker & Bölte, 2021 ). Overall, transitions from different developmental and life phases are important, as these are associated with a rise in vulnerability. As the term ‘spectrum’ suggests, symptoms and therefore needs for support vary among autistic individuals (Kamp-Becker & Bölte, 2021 ). Since autism is a lifelong condition, most individuals need support and services throughout their lifetime. Most services (such as therapy and social skills training) are used in early and middle childhood (Song et al., 2022 ). The US Center for Disease Control and Prevention (CDC, 2023 ) estimated that one in 36 children is diagnosed with ASD. ASD was 3,8 times more prevalent among boys than among girls (approximately 4% of boys and 1% of girls). In total, 37.9% of the autistic individuals had an intellectual disability (IQ < 70), 23.5% had an IQ between 71 and 85, and 38.6% had an IQ > 85. However, it should be noted that the prevalence varies between countries and studies. Autism is also often associated with psychiatric conditions. It is estimated that 70–72% of autistic youth have at least one psychiatric condition. Some of the most common disorders are anxiety, depression and attention deficit hyperactivity disorder (ADHD; Rosen et al., 2018 ).
School Absenteeism among Autistic Individuals
According to the Department for Education ( 2019 ) autistic students in England explore higher rates of school absences than non-autistic students with or without special educational needs. When educational needs align with challenges in social skills and communication, absenteeism rates tend to increase. On the other hand, schools comprise a variety of communication and interaction situations (Ashburner et al., 2010 ). Autistic students often find social interactions stressful, thereby facing an increased risk of limited participation and social exclusion (Roberts & Simpson, 2016 ). These circumstances elevate the risk of psychiatric conditions (Hebron & Humphrey, 2014 ). These co-occurring psychiatric conditions heighten the risk of school absenteeism (Finning et al., 2019 ).
To date no systematic review has investigated the risk factors of school absenteeism among autistic students. The aim of this study is to systematically review studies regarding the risk and influence factors for school absenteeism in autistic students. In particular, individual, educational, and parental factors of the micro- and mesosystems are considered. Another aim is to identify research gaps for further investigations.
The primary research questions for this systematic review include:
What types of school absenteeism have been identified in prior studies for autistic students?
What individual, school, and parental factors contribute to school absenteeism among autistic students?
Review Methods
The protocol for this systematic review has been registered online at PROSPERO, an international register for systematic reviews (Registration number: CRD42022343467). The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA 2020) standards has been followed for all stages of this systematic review (Page et al., 2021 ). The following electronic databases covering all relevant disciplines have been searched for journal articles: ERIC (Ped), Web of Science and Scopus (Psych), and PubMed (Med) on 26th June 2022. Prior to this search, a preliminary search was performed and an updated search was carried out on 30th November 2023. The Cochrane and PROSPERO databases have been searched to confirm that there was no other existing or registered systematic review about the current topic. The search strategy included terms regarding autism and school absenteeism (see Table 1 ).
Inclusion Criteria
The studies included in this review have been selected based on the following predetermined inclusion criteria: (a) they focused on school-aged individuals with a formal diagnosis of autism; (b) they focused on individual, family or school factors having an influence on any form of school absenteeism; and (c) they were published in German or English. No restrictions were applied regarding the publication period of the included articles.
Exclusion Criteria
Studies were excluded from the review based on one or more of the following criteria: (a) they were published in languages other than English or German; (b) they were not empirical studies; (c) they focused on non-autism samples or mixed etiology groups and the data for autistic individuals were not reported separately; and (d) they did not scrutinise school absenteeism and influencing factors. This review did not include grey literature, but the search was not restricted to peer-reviewed articles.
Study Selection
Electronic searches identified 322 records. Following the removal of duplicates, each reviewer independently assessed 148 articles based on the title and abstract; each reviewer was blinded to the other’s ratings. Disagreements were solved by discussion.
After screening the full texts, 18 studies that met the inclusion criteria were identified and included in the current review.
Quality Assessment
The quality of each included study was assessed by both reviewers independently by using the Mixed Method Appraisal Tool (MMAT) described by Hong et al. ( 2018 ). Disagreements were resolved by both authors discussing the information presented. The MMAT is an appraisal tool for systematic reviews that include quantitative, qualitative and mixed methods studies. Hong et al. ( 2018 ) developed the tool based on a literature review of critical appraisal tools. By using this tool, the study quality was categorised as good, moderate or low. Sixteen studies were rated as ‘good’, and two studies were rated as ‘moderate’. One of these studies has limitations in its quality since the actual research question was not answered (Ochi et al., 2020 ). However, the authors identified these limitations. The other study did not formulate any explicit research questions (Kurita, 1991 ). No studies were excluded due to low quality.
Data Extraction
The first author (I.S.) extracted the data according to predefined criteria. The second author (T.S.) controlled the integrity and verified the accuracy of all the extracted data.
Data were extracted and coded for each study that met the inclusion criteria. The following descriptive data were extracted: study details, information about the sample, the definition of school absenteeism, the criteria for school absenteeism (e.g., 10% absence of school days), the data collection tool for school absenteeism, the risk and influencing factors, the absence rate, the intervention, and the effect of the intervention.
A narrative synthesis was provided due to the heterogeneity of the studies, especially regarding the terminology and measurement of school absenteeism as well as the criteria of different forms of school absenteeism.
Figure 3 shows the evaluation and screening process used to select the 18 studies included in this systematic review. Table 1 provides the details for each included study.
![research paper academic review figure 3](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs40489-024-00474-x/MediaObjects/40489_2024_474_Fig3_HTML.png)
PRISMA 2020 flow diagram
Three studies were from the same research group (Bitsika et al., 2020 , 2021 , 2022 ). All three address the topic of bullying. Bitsika et al. ( 2022 ) studied a subsample of a larger cohort from Bitsika and Sharpley ( 2016 ). Bitsika et al. ( 2021 ) used a sample from Bitsika et al. ( 2020 ). Each article has a different research question.
Munkhaugen et al. ( 2019 ) based their research on a subsample from the first study (Munkhaugen et al., 2017 ).
Study Characteristics
All studies except Kurita ( 1991 ) are very recent (2017–2023). These studies were conducted in Australia (Adams, 2021 ; Bitsika et al., 2020 , 2021 , 2022 ), the United Kingdom (Gray et al., 2023 ; Martin-Denham, 2022 ; O’Hagan et al., 2022 ; Preece & Howley, 2018 ; Totsika et al., 2020 ; Truman et al., 2021 ), Sweden (Anderson, 2020 ), Japan (Kurita, 1991 ; Ochi et al., 2020 ), Norway (Munkhaugen et al., 2017 , 2019 ), the United States (Mattson et al., 2022 ; McClemont et al., 2021 ) and Denmark (Lassen et al., 2022 ).
Three of the 18 studies used qualitative designs, two used mixed method designs, and 13 used quantitative designs. Eleven studies employed cross-sectional designs, while there was also an evaluative case study that aimed to identify the impact of an intervention, a retrospective chart review study, a longitudinal study based on retrospective school datasets, a brief report of an observational study, a qualitative study with a multi-informant approach, a qualitative study that is based on case reports and a qualitative study consisting of an interpretative phenomenological approach.
The sample size ranged from N = 1799 in a quantitative cross-sectional study to N = 3 in qualitative case reports. The total sample included 3304 autistic students. The ages ranged between 3 and 21 years. Two studies examined absenteeism in preschoolers with autism. The sample was predominantly male except for the only qualitative study that explicitly focused on girls with autism (O’Hagan et al., 2022 ). Fourteen studies based their results on parental reports, and four studies considered additional school staff or other professionals involved. One qualitative study collected data by interviewing the autistic young people and one used a multi-informant approach by interviewing parents, professionals and school staff. Two studies focused on data bases: one used clinical data (Ochi et al., 2020 ) and the other used school datasets (Mattson et al., 2022 ). All studies collected data regarding mainstream schools. Six studies also collected data in a special school setting. The detailed information for each included study is summarised in Table 1 .
Types of School Absenteeism
In the included studies, school refusal was the most commonly used term for absenteeism. In total, 11 studies referred to this term (Adams, 2021 ; Bitsika et al., 2020 , 2021 , 2022 ; Kurita, 1991 ; McClemont et al., 2021 ; Munkhaugen et al., 2017 , 2019 ; Ochi et al., 2020 ; Preece & Howley, 2018 ; Totsika et al., 2020 ). The studies are based on the definition in which school refusal occurs due to emotional distress with knowledge of the parents (Heyne et al., 2019 ; Kearney, 2008 ). Totsika et al. ( 2020 ) referred to school withdrawal, truancy, school exclusion, and nonproblematic absence, as these are all categories included in the data collection tool they used (the School Non-Attendance Checklist [SNACK] by Heyne et al., 2019 ). Adams ( 2021 ) also used the SNACK and referred to the types defined by Heyne et al. ( 2019 ) but also described the difference between emerging and established school refusal . Furthermore, the author investigated full- and half-day absences. Bitsika et al., ( 2020 , 2021 , 2022 ) also followed the definition of school refusal established by Heyne et al. ( 2019 ). They argued that school refusal is often associated with absence from school, but it is not necessarily defined by absence; therefore, they used the term emerging school refusal (Bitsika et al., 2020 ).
Munkhaugen et al., ( 2017 , 2019 ) chose school refusal behaviour as the object of research. They referred to Kearney ( 2008 ) who defined school refusal behaviour as ‘child-motivated refusal to attend school and/or difficulties remaining in class’ (Munkhaugen et al., 2017 ).
Kurita ( 1991 ) operationalised school refusal according to Berg et al.’s ( 1969 ) definition as absence from school due to reluctance to attend with the knowledge of the parents, while no antisocial disorders occur with this absence.
O’Hagan et al. ( 2022 ) used the phrase ‘emotionally based’ school avoidance and referred to Munkhaugen et al. ( 2017 ). Hence, it can be assumed that O’Hagan et al. ( 2022 ) used school avoidance as a synonym for school refusal behaviour . Gray et al. ( 2023 ) also used the term school avoidance as a synonym for school refusal .
Truman et al. ( 2021 ) did not directly focus on school absenteeism. They evaluate school experiences in the context of extreme demand avoidance behaviour. One aspect relating to this group of autistic children is school exclusion due to challenging behaviour. They included both formal and informal exclusions. In contrast, Gray et al. ( 2023 ) and Martin-Denham ( 2022 ) had an explicit focus on school exclusion. Martin-Denham ( 2022 ) referred to the Education Act and the European Court, which stated that a decision to exclude has to be lawful, rational, proportionate and fair. A differentiation was made between a fixed period exclusion, where a student was excluded from school for a set period, and a permanent exclusion, when a student did not return to school. Gray et al. ( 2023 ) also referred to this differentiation between fixed-term and permanent exclusion.
Two other included studies addressed the differentiation between unexcused and excused absences (Mattson et al., 2022 ), school absences and nonproblematic absences, respectively (Anderson, 2020 ) (Table 2 ).
Criteria and Frequency of School Absenteeism
Criteria for school absenteeism.
The included studies used different criteria to operationalise absenteeism. Two studies used the criterion of 10% absence from school days (O’Hagan et al., 2022 ; Totsika et al., 2020 ). Adams ( 2021 ) also used this criterion but to discuss ‘persistent’ absence. Munkhaugen et al., ( 2017 , 2019 ) relied on the criteria described by Kearney and Silverman ( 1996 ), who differentiated between ‘self-corrective’ for < 2 weeks, ‘acute’ absence for 2–52 weeks, and ‘chronic’ absence for > 53 weeks. However, they did not provide information about how often the behaviour occurred during the period. Ochi et al. ( 2020 ) used more than 30 days per year as a criterion. Gray et al. ( 2023 ) utilised a broad definition of school exclusion “to ensure it captured the full range of experiences of autistic pupils who had persistent, problematic attendance and experience of leaving a mainstream setting due to unmet needs”. Martin-Denham ( 2022 ) refers to school exclusion as a legal term. Five studies did not explicitly determine a criterion for absence in terms of a number. Rather, they explained it with descriptions such as ‘prolonged’ (Preece & Howley, 2018 ). For the remaining five studies, it was not necessary to determine the criterion thematically or because of the study design.
Frequency of Absences
Despite the different study designs and terms, the results regarding the frequencies of absences are considered in the following.
Adams ( 2021 ) reported the highest rate of absenteeism: 72.6% of autistic children had shown ‘persistent absence’, defined as a 10% absence within the 20-day survey period. The average absenteeism rate in the study was 6.3 full days and 3.8 half days. In addition, 5.7% of the autistic students were absent for 4 weeks; all of them (partly among other reasons) did so due to school refusal.
Totsika et al. ( 2020 ) reported that 43% of autistic children showed persistent absence during a 23-day period. The average absence rate was 5 days. The median number of days missed was 2. Moreover, 64% of the autistic children missed at least 1 day, and 7% did not attend school on any of the 23 days. Similarly, Munkhaugen et al. ( 2017 ) reported that 42.6% of autistic students exhibited school refusal behaviour. Bitsika et al. ( 2020 ) reported that 56.1% of autistic boys who reported being bullied experienced emerging school refusal, but as seen in the definition stated above, this is not a clear indication of actual absence from school.
Kurita ( 1991 ) reported the lowest frequencies: 23.7% of autistic students experienced school refusal (as defined above). In addition, 28.1% were reported to have shown an unwillingness to go to school that did not result in absenteeism. According to the data provided by parents of autistic children, 35% indicated that their child had already refused to go to school (McClemont et al., 2021 ). Regarding school exclusion, Truman et al. ( 2021 ) reported that 50% of autistic children were informally excluded from school.
Anderson ( 2020 ) reported the frequency of absences between different school types. The rates of absences for reasons other than illness (unexcused absence) did not significantly differ between primary (51.3%) and secondary (57.6%) schools. In primary schools for students with learning disabilities absences due to illness (excused absences) were the main cause (83.8%) among autistic students. The rate of absenteeism for reasons other than illness (unexcused absence) increased in secondary schools for students with learning disabilities (36.3%). In elementary schools, the median percentage of school day absences was 9.1% in the study by Mattson et al. ( 2022 ). On 39.1% of all missed school days analysed, students had excused absences, while 60.9% of absences were unexcused. Lassen et al. ( 2022 ) reported more absences among autistic children than among the control group.
Data Collection Tool for School Absenteeism
As stated above, two studies used the SNACK conducted by Heyne et al. ( 2019 ). Adams ( 2021 ) modified the SNACK by also asking about half-day absences.
The majority of studies used nonvalidated scales. Six studies used self-constructed questionnaires (Anderson, 2020 ; Bitsika et al., 2020 , 2021 , 2022 ; Kurita, 1991 ; McClemont et al., 2021 ; Munkhaugen et al., 2017 , 2019 ; Truman et al., 2021 ). Lassen et al. ( 2022 ) asked about frequency via a 5-point Likert scale with descriptive ratings (never, rarely, sometimes, often, very often).
Qualitative studies (Gray et al., 2023 ; Martin-Denham, 2022 ; O’Hagan et al., 2022 ) as well as a mixed-method study (Preece & Howley, 2018 ) have used interviews for data collection.
Two studies used existing datasets. One of them used clinical data (Ochi et al., 2020 ), whereas the other used school datasets (Mattson et al., 2022 ).
Risk and Influencing Factors
According to the Kids and Teens at School Framework (KiTeS) by Melvin et al. ( 2019 ), the extracted risk and influencing factors for school absenteeism among autistic students were divided into individual, school and parental factors.
Individual Factors
Age, gender, diagnosis, intellectual level and psychiatric conditions were identified as factors at the individual level.
Mattson et al. ( 2022 ) reported that age was weakly and negatively correlated with the median percentage of days absent. They demonstrated that younger participants exhibited more frequent absences on average than older students. Another study reported that the mean age at the onset of school refusal was 12.6 ± 2.2 years in autistic students, which was significantly younger than in those without autism (13.8 ± 2.1 years; Ochi et al., 2020 ). In contrast, Totsika et al. ( 2020 ) reported slightly increased rates of not attending school with increasing age. Among children who missed any school days, refusal was more likely among older children.
Anderson ( 2020 ) revealed a gender difference in the disadvantage of girls on the autism spectrum. They exhibited higher rates of absence (54.6%) for reasons other than illness than autistic boys (43.9%). Compared with boys, girls exhibited significantly more short absences for reasons other than illness. For continuous periods of absence longer than four weeks, there was no significant difference between boys and girls.
In the study of O’Hagan et al. ( 2022 ), two mothers of autistic children with school avoidance indicated that feeling different from others without an explanation of a diagnosis led to low confidence and self-esteem. Families and professionals, in the study of Preece and Howley ( 2018 ), identified a late diagnosis as contributing to non-attendance since the special needs of autistic students were therefore not recognised and addressed. The findings of Martin-Denham ( 2022 ) indicate “barriers to gaining prompt assessment and identification of special educational needs and disability (SEND)”. However, students who already have a diagnosis may struggle with feeling different (Martin-Denham, 2022 ) and having a “desire to fit in” (Gray et al., 2023 ).
Intellectual Level
While most of the related studies have focused on autistic students without intellectual disabilities, Kurita ( 1991 ) found that autistic students who experienced school refusal tended to be more intelligent than those who did not. The intellectual level was significantly greater for autistic children who refused school than for those who did not.
Psychiatric Conditions
Truman et al. ( 2021 ) focused on a group of autistic children with extreme demand avoidance behaviour. These children showed more specific behavioural difficulties. They were able to mask their difficulties at school and then experienced a meltdown after. Fifty percent of parents informally excluded their children from school so that they could be home-educated, reducing their anxiety and stress.
On the other hand, the parents in the study of Gray et al. ( 2023 ) reported that they did not notice the anxiety of their children because they could not communicate their feelings. Anxiety was also demonstrated by aggression, which in turn led to school exclusions and, in some cases, led to symptoms of depression, including self-harm and suicide attempts.
Adams ( 2021 ) reported a 3% increased risk for half-day absences when the child experienced anxiety.
Munkhaugen et al. ( 2019 ) showed that autistic students with school refusal behaviour were more socially impaired than those without such behaviour. Nonetheless, low social motivation had the strongest association with school refusal behaviour. Parents commented that negative thoughts about relationships with peers and teachers, as well as about school subjects, were frequent reasons for their children’s school refusal behaviour. Lassen et al. ( 2022 ) reported that school absence is accompanied by internalising symptoms such as anxiety. This association was even stronger than that with autistic or externalising symptoms and was not unique to the autism group.
School Factors
School factors had the greatest influence on school absenteeism. Five studies focused their research on bullying. Other factors related to the school setting are the school type, the school environment and negative experiences.
The significance of school factors can even be seen in the oldest study. Two-thirds of parents of autistic children who refused school indicated that school refusal behaviour was a precipitating factor. The majority were school-related, with “teasing by schoolmates” being the most common factor (Kurita, 1991 ).
McClemont et al. ( 2021 ) reported that autistic children with ADHD were more likely to refuse school due to bullying (68%) than autistic children without ADHD (28%) or no diagnosis (18%). In this study, an autism diagnosis or another diagnosis did not impact the frequency of school refusal due to bullying compared to children with no diagnosis. In contrast, Ochi et al. ( 2020 ) reported that bullying was significantly associated with school refusal in autistic boys and girls. In the sample of Bitsika et al. ( 2020 ), which consisted only of autistic boys, “being bullied explained more of the variance in emerging school refusal than did age, ASD-related difficulties (judged by their mothers), and self-reported anxiety and depression”. Eighty-five percent of the surveyed boys reported that they had been bullied at school, and 56% of them asked their parents if they could stay at home as a result of the bullying. Bitsika et al. ( 2021 ) identified in another sample from a previous study (Bitsika & Sharpley, 2016 ) the most common bullying experiences: being called mean names or being sworn at (experienced by 75.9% of the sample); being joked about or laughed at (67.2%); being hit, pushed, or kicked (63.8%); having had something taken from them (55.1%); being “ganged up on” (56.9%); and having been reported to teachers when they had not done things that were reportable (51.3%). A participant of Gray et al. ( 2023 ) talked about being bullied because he “didn’t know what they were going on about”.
McClemont et al. ( 2021 ) described another aspect of bullying: autistic youth with a behaviour support plan (BSP) were more likely to refuse school due to bullying than were those without. Anderson ( 2020 ) cited bullying as a factor that had a limited influence. The remaining factors outlined below exerted a more pronounced influence on absences.
School Type
Totsika et al. ( 2020 ) highlighted the significance of school type. The risk for persistent non-attendance increased by 104% when the autistic child attended a mainstream school, by 100% for total days absent, and by 79% for total number of days missed. Additionally, school exclusions were slightly more frequent in mainstream schools. Anderson ( 2020 ) also revealed a significant difference between school type and absence from school. School absence due to illness was the main cause of absence in primary schools for students with learning disabilities (83.8%), but the rate of absenteeism for reasons other than illness increased when students attended secondary schools for students with learning disabilities (36.3%). The results indicate that the rate of school absenteeism among autistic students in primary school is relatively high and increases when pupils start secondary school. Gray et al. ( 2023 ) revealed that the amount of support in schools varied “depending on knowledge, willingness to accommodate needs and carrying out advice and implementing statutory guidelines”.
In a study by Martin-Denham ( 2022 ), caregivers noted a lack of knowledge, skills, understanding, and funding in mainstream secondary schools. All participants noted that barriers to mainstream education occurred because the school staff was not adequately trained in supporting children with SEND. Similar factors regarding the school staff were mentioned by participants in the study by Gray et al. ( 2023 ): lack of understanding of autism, negative attitudes and problematic responses and interactions. Additional factors included a lack of flexibility regarding rules and homework on the one hand and unstructured times on the other hand. Not knowing the needs and not understanding the reactions of the autistic children led to school exclusions or exclusions from school events.
Anderson ( 2020 ) asserted that a lack of autism competence among school staff was the most common reason for children’s school absence.
School Environment
The second most common reason in the study by Anderson ( 2020 ) was the lack of adaptation of the school environment (24.3%), followed by a lack of support in learning (23.5%) and social situations (23.8%). Factors identified by Preece and Howley ( 2018 ) regarding the school environment include a lack of understanding and appropriate support, the size of the school, and the number of students because of sensory issues such as noise. Gray et al. ( 2023 ) also listed the sensory issues of participants. The number of people, large classrooms with bright light and unstructured times led to feelings of overwhelm or sensory overload. Contrary to reports recommending the use of safe spaces to support emotional regulation, Martin-Denham ( 2022 ) noted that schools were unable to implement them due to a lack of space. A different perspective regarding the learning environment was found in the study by Gray et al. ( 2023 ). Many young people described meltdowns when doing homework because of their need for “straight separation between school and home”.
Negative Experiences
The factors described above led in the study by Gray et al. ( 2023 ) to a feeling of being treated unfairly, “which made me just feel stressed and I just refused to engage [in school]”. The results of a parent and teacher questionnaire survey of autistic students by Munkhaugen et al. ( 2017 ) suggested avoiding specific subjects, conflicts with peers or teachers, and insufficient information concerning the subjects or activities in school as possible reasons for school refusal behaviour. In the study of Truman et al. ( 2021 ), parents described negative school experiences to be at least partly caused by a lack of understanding of autism. Some of these parents considered the reason for the misunderstanding in their child’s ability to mask their difficulties. The parents also indicated that ‘masking’ may be the reason why their children’s special needs were not adequately addressed. Others reported that home-education can reduce the anxiety of their autistic children: “All the stress of having to deal with the situations gone. Can now concentrate on learning and living” (Truman et al., 2021 ). A mother in the study by Martin-Denham ( 2022 ) described that anxiety due to a focus on negative aspects in school led to a desire to die: “You can see the anxiety, and when your son says he wants to die that is hard to listen to. So, every day he would come home with this planner and […] there would be no positives, […]. So, he felt down all the time”.
Parental Factors
Parental factors that exert an influence are parental unemployment and illness. In addition, demographic characteristics are closely linked to parental factors, such as living in a two-parent household or having educational qualifications. In most studies, demographic characteristics had no influence on school absenteeism (Kurita, 1991 ; McClemont et al., 2021 ; Munkhaugen et al., 2017 , 2019 ). However, Totsika et al. ( 2020 ) reported an association between school exclusions and not living in a two-parent household: the risk increased by 37% to 75%.
Parental Unemployment
The risk of non-attendance increased by 52% to 78% if parents were unemployed. Fifty-two percent had persistent absence, 57% had total days missed, and 78% had days absent (Totsika et al., 2020 ). Adams ( 2021 ) even reported an increase of 85% when parents reported not having paid employment. On the other hand, parents in two studies (Gray et al., 2023 ; Martin-Denham, 2022 ) reported “having to give up” their jobs as a result of school absenteeism.
Illness of family members
In the study by Munkhaugen et al. ( 2017 ), illness of other family members was the only sociodemographic factor that showed a significant association with school refusal behaviour in autistic students. Similarly, Adams ( 2021 ) reported that the risk of school refusal increased by 20% as parental depression scores increased.
Supporting Factors
Mainly, four included studies (Gray et al., 2023 ; Martin-Denham, 2022 ; O’Hagan et al., 2022 ; Preece & Howley, 2018 ) identified several aspects to support re-engagement. The most mentioned aspects were the quality of interactions between teachers and autistic students, as well as between parents and teachers. The development of a flexible learning approach was identified as supporting, as well as incorporating the voice of the young person into their support plan and the opportunity to ask questions (Martin-Denham, 2022 ; O’Hagan et al., 2022 ). Autistic students valued a flexible and structured approach in support, as well as the opportunity to control their own learning and feel respected and listened to (Gray et al., 2023 ). Additionally, regarding the overall school environment, smaller group sizes and structures in the classroom and learning were mentioned, as well as being part of the school community and relationships with peers (Gray et al., 2023 ; O’Hagan et al., 2022 ; Preece & Howley, 2018 ). The consistent and effective collaboration and communication between parents and teachers were affirmed by both parents and teachers (Gray et al., 2023 ; Martin-Denham, 2022 ). Parents also claim that an earlier diagnosis contributes to school engagement (Martin-Denham, 2022 ; O’Hagan et al., 2022 ).
The risk and influencing factors of school absenteeism among students on the autism spectrum were systematically reviewed across 18 studies. Nine studies solely included parents as participants, one study additionally included teachers, and one other study additionally included autistic children. Three studies based their data on the children, parents and professional staff. Two studies used existing records.
The most common term for school absenteeism was school refusal, while studies have used different criteria for determining absences. Based on the frequencies of school absenteeism shown among different study designs, it is clear that this is a serious phenomenon that occurs among autistic students internationally. Several identified factors also showed similarities and complementarities within the included studies.
The school level predominantly exhibited the most significant factors influencing absenteeism. Bullying was the most frequently studied influence and the factor with the greatest impact.
Other factors at the school level that significantly influenced absenteeism included school type, school environment, and negative experiences. In five studies, bullying was found to be a risk factor for school absenteeism (McClemont et al., 2021 ; Ochi et al., 2020 ; Bitsika et al., 2020 , 2021 , 2022 ). All studies revealed significant associations between bullying and absenteeism. Being bullied can also lead to anxiety and depression up to suicidal attempts or ideation (Martin-Denham, 2022 ). Autistic students with school refusal had higher scores for major depression, general anxiety, and separation anxiety, as well as significantly greater levels of somatic symptoms and sleeping difficulties (Bitsika et al., 2022 ). Conversely, individual factors, including externalizing symptoms and reduced social motivation, also increase the risk for bullying (Karande, 2018 ). However, other studies that examined bullying, among other factors, found that these factors had greater influences on absences (Anderson, 2020 ; Gray et al., 2023 ). The influence of school type was mostly related to a lack of knowledge of school staff in mainstream schools (Anderson, 2020 ; Gray et al., 2023 ; Martin-Denham, 2022 ). This factor was accompanied by a lack of adapting to the school environment due to a lack of resources or support (Anderson, 2020 ; Gray et al., 2023 ; Martin-Denham, 2022 ; Preece & Howley, 2018 ). A lack of support and understanding in schools increases the risk of anxiety and depression (Martin-Denham, 2022 ). The results may suggest that these conditions are contributing factors because individual needs are not addressed. Therefore, it is necessary to explore in more detail what leads to bullying and which interactional processes take place. Similarly, more research focusing on interactive processes in schools is needed.
At the individual level, age, gender, diagnosis, intellectual level and psychiatric conditions were identified. Three studies reported on the influence of age (Mattson et al., 2022 ; Ochi et al., 2020 ; Totsika et al., 2020 ). Autistic students were younger at the onset of school absences, and the frequency of absences increased with age. These results are consistent with the increasing social demands at school age (Kamp-Becker & Bölte, 2021 ). However, there is a need for further investigation of the influence of age. Mediating variables associated with age must also be considered. Anderson ( 2020 ) showed that girls had greater rates of short absences than boys. There was no other statement regarding gender since most participants were boys. Recent surveys continue to show that autism is four times more prevalent in boys than in girls (CDC, 2020 ). Nevertheless, there is clearly a lack of research regarding autism in female students. Three studies showed that feeling different from others contributed to school absences (Gray et al., 2023 ; Martin-Denham, 2022 ; O’Hagan et al., 2022 ). This shows the need for education on neurodiversity in schools (Honeybourne, 2018 ). Since Kurita ( 1991 ) reported that autistic students who experienced school refusal tended to be more intelligent, studies have focused on autistic students without intellectual disability. Nevertheless, more current research on the school attendance of autistic children with intellectual disabilities would be desirable. Five studies acknowledged the contribution of psychiatric conditions to school absences (Adams, 2021 ; Gray et al., 2023 ; Lassen et al., 2022 ; Munkhaugen et al., 2019 ; Truman et al., 2021 ). All five studies found anxiety to be a contributing factor. Lassen et al. ( 2022 ) even found a stronger association with internalising symptoms such as anxiety than with externalising or autistic symptoms. As anxiety is one of the most common psychiatric conditions in autistic individuals, it can influence school outcomes (for more information, see the review of Adams et al., 2019 ). The influence of other psychiatric disorders should be investigated in more detail in further research.
The parental factors that influence school absenteeism are parental unemployment and illness.
Two studies (Adams, 2021 ; Totsika et al., 2020 ) revealed an increased risk when parents were unemployed.
On the other hand, parents reported having to quit their jobs due to the school absenteeism of their children (Gray et al., 2023 ; Martin-Denham, 2022 ). Due to the effects on the socioeconomic status of a family, a further link between these two aspects should be explored in further research.
The effect of the illness of a family member was also reported by two studies. Munkhaugen et al. ( 2017 ) found this to be the only sociodemographic factor with a significant association. However, Adams ( 2021 ) reported an increased risk when parents had high depression scores. Mental health issues in parents due to stress and guilt were also shown to result from school absenteeism in two studies (Gray et al., 2023 ; Martin-Denham, 2022 ). Parents mentioned that they also need support in regard to school absenteeism in their autistic children (Martin-Denham, 2022 ). Families benefit from organisations that support the family as well as the school (Martin-Denham, 2022 ). In particular, children with special needs are dependent on the support of their parents or other caregivers (Romero & Lee, 2007 ), emphasising the need to support them in dealing with their children and school. Research that involves further system levels is needed. Support for parents can also be provided through interaction between parents and schools. Successful collaboration between parents and schools has a positive impact on the school experience of autistic students (Lilley, 2019 ) (Fig. 4 ).
![research paper academic review figure 4](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs40489-024-00474-x/MediaObjects/40489_2024_474_Fig4_HTML.png)
Interactions between factors
Missing school is claimed to be going hand in hand with missing important developmental steps for life in society (Pellegrini, 2007 ). However, as seen in the results, for children on the autism spectrum, there are also risks for development and mental health in schools, which need to be fixed to enable the development of autistic children in schools. Parents affirmed home-education as a possibility for their autistic children to “concentrate on learning and living” (Truman et al., 2021 ). The advantages and disadvantages of home-education could be further investigated, as school is an important area in the lives of children and adolescents. The results show that the interaction between parental and individual factors is necessary but has not been adequately investigated. None of the included studies investigated parental withholding. Nevertheless, this sensitive and complex phenomenon should be examined in future research.
The results show that the school situation of autistic children should be investigated further. There is a lack of longitudinal studies regarding the education and school situation of autistic students, as well as a lack of validated scales for data collection. Nevertheless, the actuality of the included studies indicates that there is a growing research base on this topic.
Limitations
The results of this systematic review must be classified within its limitations. Given the overall scarcity of research in this area, a research question was developed that yielded the broadest possible results while allowing us to draw consistent conclusions. Therefore, studies with different terms of school absenteeism and different study designs were included. In addition, school absenteeism must be viewed in the context of school and health care systems in each country. This diversity makes comparability difficult and was carried out by the researchers on the basis of a narrative synthesis. The synthesis might reflect the researcher’s interpretation of the data. Given the heterogeneity, it is possible that other studies included risk and influencing factors that were not identified. The specific influences of the COVID-19 pandemic were not considered. Due to limited resources, this review was conducted by only two researchers, which may have introduced limitations in the search strategy. Finally, only studies published in English or German were considered.
This systematic review provides a comprehensive summary of mainly recently published studies on the factors influencing school absenteeism among autistic students. Eighteen studies were included, each with a different research focus and study design. Taken together, the results provide a picture of the different influences at the individual, school and parental levels. Future research should incorporate other system levels as well as self-reports of autistic students and validated scales to draw conclusions for the inclusion of neurodivergent students.
Studies included in the review:
Adams, D. (2021). Child and parental mental health as correlates of school non-attendance and school refusal in children on the autism spectrum. Journal of Autism and Developmental Disorders, 52 (8), 3353–3365. https://doi.org/10.1007/s10803-021-05211-5
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Anderson, L. (2020). Schooling for pupils with autism spectrum disorder: parents’ perspectives. Journal of Autism and Developmental Disorders, 50 (12), 4356–4366. https://doi.org/10.1007/s10803-020-04496-2
Bitsika, V., Heyne, D. A., & Sharpley, C. F. (2020). Is bullying associated with emerging school refusal in autistic boys? Journal of Autism and Developmental Disorders, 51 (4), 1081–1092. https://doi.org/10.1007/s10803-020-04610-4
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Bitsika, V., Heyne, D. A., & Sharpley, C. F. (2022). The inverse association between psychological resilience and emerging school refusal among bullied autistic youth. Research in Developmental Disabilities, 120 , 104121. https://doi.org/10.1016/j.ridd.2021.104121
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Bitsika, V., Sharpley, C., & Heyne, D. (2021). Risk for school refusal among autistic boys bullied at school: Investigating associations with social phobia and separation anxiety. International Journal of Disability, Development and Education, 69 (1), 190–203. https://doi.org/10.1080/1034912X.2021.1969544
Gray, L., Hill, V., & Pellicano, E. (2023). “He’s shouting so loud but nobody’s hearing him”: A multi-informant study of autistic pupils’ experiences of school non-attendance and exclusion. Autism & Developmental Language Impairments, 8 , 23969415231207816. https://doi.org/10.1177/23969415231207816
Kurita, H. (1991). School refusal in pervasive developmental disorders. Journal of Autism and Developmental Disorders, 21 (1), 1–15. https://doi.org/10.1007/BF02206993
Lassen, J., Aggernæs, B., Foldager, M., Pedersen, J., Oranje, B., Kjær, T. W., Arnfred, S., & Vestergaard, M. (2022). Psychopathological symptoms associated with psychosocial functioning in children and adolescents with autism spectrum disorders and their typically developing peers. Research in Autism Spectrum Disorders, 98 , 102040. https://doi.org/10.1016/j.rasd.2022.102040
Martin-Denham, S. (2022). Marginalisation, autism and school exclusion: Caregivers’ perspectives. Support for Learning, 37 (1), 108–143. https://doi.org/10.1111/1467-9604.12398
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Sasso, I., Sansour, T. Risk and Influencing Factors for School Absenteeism among Students on the Autism Spectrum—A Systematic Review. Rev J Autism Dev Disord (2024). https://doi.org/10.1007/s40489-024-00474-x
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