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Why is it important to do a literature review in research?

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 “A substantive, thorough, sophisticated literature review is a precondition for doing substantive, thorough, sophisticated research”. Boote and Baile 2005

Authors of manuscripts treat writing a literature review as a routine work or a mere formality. But a seasoned one knows the purpose and importance of a well-written literature review.  Since it is one of the basic needs for researches at any level, they have to be done vigilantly. Only then the reader will know that the basics of research have not been neglected.

Importance of Literature Review In Research

The aim of any literature review is to summarize and synthesize the arguments and ideas of existing knowledge in a particular field without adding any new contributions.   Being built on existing knowledge they help the researcher to even turn the wheels of the topic of research.  It is possible only with profound knowledge of what is wrong in the existing findings in detail to overpower them.  For other researches, the literature review gives the direction to be headed for its success. 

The common perception of literature review and reality:

As per the common belief, literature reviews are only a summary of the sources related to the research. And many authors of scientific manuscripts believe that they are only surveys of what are the researches are done on the chosen topic.  But on the contrary, it uses published information from pertinent and relevant sources like

  • Scholarly books
  • Scientific papers
  • Latest studies in the field
  • Established school of thoughts
  • Relevant articles from renowned scientific journals

and many more for a field of study or theory or a particular problem to do the following:

  • Summarize into a brief account of all information
  • Synthesize the information by restructuring and reorganizing
  • Critical evaluation of a concept or a school of thought or ideas
  • Familiarize the authors to the extent of knowledge in the particular field
  • Encapsulate
  • Compare & contrast

By doing the above on the relevant information, it provides the reader of the scientific manuscript with the following for a better understanding of it:

  • It establishes the authors’  in-depth understanding and knowledge of their field subject
  • It gives the background of the research
  • Portrays the scientific manuscript plan of examining the research result
  • Illuminates on how the knowledge has changed within the field
  • Highlights what has already been done in a particular field
  • Information of the generally accepted facts, emerging and current state of the topic of research
  • Identifies the research gap that is still unexplored or under-researched fields
  • Demonstrates how the research fits within a larger field of study
  • Provides an overview of the sources explored during the research of a particular topic

Importance of literature review in research:

The importance of literature review in scientific manuscripts can be condensed into an analytical feature to enable the multifold reach of its significance.  It adds value to the legitimacy of the research in many ways:

  • Provides the interpretation of existing literature in light of updated developments in the field to help in establishing the consistency in knowledge and relevancy of existing materials
  • It helps in calculating the impact of the latest information in the field by mapping their progress of knowledge.
  • It brings out the dialects of contradictions between various thoughts within the field to establish facts
  • The research gaps scrutinized initially are further explored to establish the latest facts of theories to add value to the field
  • Indicates the current research place in the schema of a particular field
  • Provides information for relevancy and coherency to check the research
  • Apart from elucidating the continuance of knowledge, it also points out areas that require further investigation and thus aid as a starting point of any future research
  • Justifies the research and sets up the research question
  • Sets up a theoretical framework comprising the concepts and theories of the research upon which its success can be judged
  • Helps to adopt a more appropriate methodology for the research by examining the strengths and weaknesses of existing research in the same field
  • Increases the significance of the results by comparing it with the existing literature
  • Provides a point of reference by writing the findings in the scientific manuscript
  • Helps to get the due credit from the audience for having done the fact-finding and fact-checking mission in the scientific manuscripts
  • The more the reference of relevant sources of it could increase more of its trustworthiness with the readers
  • Helps to prevent plagiarism by tailoring and uniquely tweaking the scientific manuscript not to repeat other’s original idea
  • By preventing plagiarism , it saves the scientific manuscript from rejection and thus also saves a lot of time and money
  • Helps to evaluate, condense and synthesize gist in the author’s own words to sharpen the research focus
  • Helps to compare and contrast to  show the originality and uniqueness of the research than that of the existing other researches
  • Rationalizes the need for conducting the particular research in a specified field
  • Helps to collect data accurately for allowing any new methodology of research than the existing ones
  • Enables the readers of the manuscript to answer the following questions of its readers for its better chances for publication
  • What do the researchers know?
  • What do they not know?
  • Is the scientific manuscript reliable and trustworthy?
  • What are the knowledge gaps of the researcher?

22. It helps the readers to identify the following for further reading of the scientific manuscript:

  • What has been already established, discredited and accepted in the particular field of research
  • Areas of controversy and conflicts among different schools of thought
  • Unsolved problems and issues in the connected field of research
  • The emerging trends and approaches
  • How the research extends, builds upon and leaves behind from the previous research

A profound literature review with many relevant sources of reference will enhance the chances of the scientific manuscript publication in renowned and reputed scientific journals .

References:

http://www.math.montana.edu/jobo/phdprep/documents/phd6.pdf

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How to Make a Literature Review in Research (RRL Example)

review of literature relevance

What is an RRL in a research paper?

A relevant review of the literature (RRL) is an objective, concise, critical summary of published research literature relevant to a topic being researched in an article. In an RRL, you discuss knowledge and findings from existing literature relevant to your study topic. If there are conflicts or gaps in existing literature, you can also discuss these in your review, as well as how you will confront these missing elements or resolve these issues in your study.

To complete an RRL, you first need to collect relevant literature; this can include online and offline sources. Save all of your applicable resources as you will need to include them in your paper. When looking through these sources, take notes and identify concepts of each source to describe in the review of the literature.

A good RRL does NOT:

A literature review does not simply reference and list all of the material you have cited in your paper.

  • Presenting material that is not directly relevant to your study will distract and frustrate the reader and make them lose sight of the purpose of your study.
  • Starting a literature review with “A number of scholars have studied the relationship between X and Y” and simply listing who has studied the topic and what each scholar concluded is not going to strengthen your paper.

A good RRL DOES:

  • Present a brief typology that orders articles and books into groups to help readers focus on unresolved debates, inconsistencies, tensions, and new questions about a research topic.
  • Summarize the most relevant and important aspects of the scientific literature related to your area of research
  • Synthesize what has been done in this area of research and by whom, highlight what previous research indicates about a topic, and identify potential gaps and areas of disagreement in the field
  • Give the reader an understanding of the background of the field and show which studies are important—and highlight errors in previous studies

How long is a review of the literature for a research paper?

The length of a review of the literature depends on its purpose and target readership and can vary significantly in scope and depth. In a dissertation, thesis, or standalone review of literature, it is usually a full chapter of the text (at least 20 pages). Whereas, a standard research article or school assignment literature review section could only be a few paragraphs in the Introduction section .

Building Your Literature Review Bookshelf

One way to conceive of a literature review is to think about writing it as you would build a bookshelf. You don’t need to cut each piece by yourself from scratch. Rather, you can take the pieces that other researchers have cut out and put them together to build a framework on which to hang your own “books”—that is, your own study methods, results, and conclusions.

literature review bookshelf

What Makes a Good Literature Review?

The contents of a literature review (RRL) are determined by many factors, including its precise purpose in the article, the degree of consensus with a given theory or tension between competing theories, the length of the article, the number of previous studies existing in the given field, etc. The following are some of the most important elements that a literature review provides.

Historical background for your research

Analyze what has been written about your field of research to highlight what is new and significant in your study—or how the analysis itself contributes to the understanding of this field, even in a small way. Providing a historical background also demonstrates to other researchers and journal editors your competency in discussing theoretical concepts. You should also make sure to understand how to paraphrase scientific literature to avoid plagiarism in your work.

The current context of your research

Discuss central (or peripheral) questions, issues, and debates in the field. Because a field is constantly being updated by new work, you can show where your research fits into this context and explain developments and trends in research.

A discussion of relevant theories and concepts

Theories and concepts should provide the foundation for your research. For example, if you are researching the relationship between ecological environments and human populations, provide models and theories that focus on specific aspects of this connection to contextualize your study. If your study asks a question concerning sustainability, mention a theory or model that underpins this concept. If it concerns invasive species, choose material that is focused in this direction.

Definitions of relevant terminology

In the natural sciences, the meaning of terms is relatively straightforward and consistent. But if you present a term that is obscure or context-specific, you should define the meaning of the term in the Introduction section (if you are introducing a study) or in the summary of the literature being reviewed.

Description of related relevant research

Include a description of related research that shows how your work expands or challenges earlier studies or fills in gaps in previous work. You can use your literature review as evidence of what works, what doesn’t, and what is missing in the field.

Supporting evidence for a practical problem or issue your research is addressing that demonstrates its importance: Referencing related research establishes your area of research as reputable and shows you are building upon previous work that other researchers have deemed significant.

Types of Literature Reviews

Literature reviews can differ in structure, length, amount, and breadth of content included. They can range from selective (a very narrow area of research or only a single work) to comprehensive (a larger amount or range of works). They can also be part of a larger work or stand on their own.

types of literature reviews

  • A course assignment is an example of a selective, stand-alone work. It focuses on a small segment of the literature on a topic and makes up an entire work on its own.
  • The literature review in a dissertation or thesis is both comprehensive and helps make up a larger work.
  • A majority of journal articles start with a selective literature review to provide context for the research reported in the study; such a literature review is usually included in the Introduction section (but it can also follow the presentation of the results in the Discussion section ).
  • Some literature reviews are both comprehensive and stand as a separate work—in this case, the entire article analyzes the literature on a given topic.

Literature Reviews Found in Academic Journals

The two types of literature reviews commonly found in journals are those introducing research articles (studies and surveys) and stand-alone literature analyses. They can differ in their scope, length, and specific purpose.

Literature reviews introducing research articles

The literature review found at the beginning of a journal article is used to introduce research related to the specific study and is found in the Introduction section, usually near the end. It is shorter than a stand-alone review because it must be limited to very specific studies and theories that are directly relevant to the current study. Its purpose is to set research precedence and provide support for the study’s theory, methods, results, and/or conclusions. Not all research articles contain an explicit review of the literature, but most do, whether it is a discrete section or indistinguishable from the rest of the Introduction.

How to structure a literature review for an article

When writing a literature review as part of an introduction to a study, simply follow the structure of the Introduction and move from the general to the specific—presenting the broadest background information about a topic first and then moving to specific studies that support your rationale , finally leading to your hypothesis statement. Such a literature review is often indistinguishable from the Introduction itself—the literature is INTRODUCING the background and defining the gaps your study aims to fill.

The stand-alone literature review

The literature review published as a stand-alone article presents and analyzes as many of the important publications in an area of study as possible to provide background information and context for a current area of research or a study. Stand-alone reviews are an excellent resource for researchers when they are first searching for the most relevant information on an area of study.

Such literature reviews are generally a bit broader in scope and can extend further back in time. This means that sometimes a scientific literature review can be highly theoretical, in addition to focusing on specific methods and outcomes of previous studies. In addition, all sections of such a “review article” refer to existing literature rather than describing the results of the authors’ own study.

In addition, this type of literature review is usually much longer than the literature review introducing a study. At the end of the review follows a conclusion that once again explicitly ties all of the cited works together to show how this analysis is itself a contribution to the literature. While not absolutely necessary, such articles often include the terms “Literature Review” or “Review of the Literature” in the title. Whether or not that is necessary or appropriate can also depend on the specific author instructions of the target journal. Have a look at this article for more input on how to compile a stand-alone review article that is insightful and helpful for other researchers in your field.

literature review examples

How to Write a Literature Review in 6 Steps

So how do authors turn a network of articles into a coherent review of relevant literature?

Writing a literature review is not usually a linear process—authors often go back and check the literature while reformulating their ideas or making adjustments to their study. Sometimes new findings are published before a study is completed and need to be incorporated into the current work. This also means you will not be writing the literature review at any one time, but constantly working on it before, during, and after your study is complete.

Here are some steps that will help you begin and follow through on your literature review.

Step 1: Choose a topic to write about—focus on and explore this topic.

Choose a topic that you are familiar with and highly interested in analyzing; a topic your intended readers and researchers will find interesting and useful; and a topic that is current, well-established in the field, and about which there has been sufficient research conducted for a review. This will help you find the “sweet spot” for what to focus on.

Step 2: Research and collect all the scholarly information on the topic that might be pertinent to your study.

This includes scholarly articles, books, conventions, conferences, dissertations, and theses—these and any other academic work related to your area of study is called “the literature.”

Step 3: Analyze the network of information that extends or responds to the major works in your area; select the material that is most useful.

Use thought maps and charts to identify intersections in the research and to outline important categories; select the material that will be most useful to your review.

Step 4: Describe and summarize each article—provide the essential information of the article that pertains to your study.

Determine 2-3 important concepts (depending on the length of your article) that are discussed in the literature; take notes about all of the important aspects of this study relevant to the topic being reviewed.

For example, in a given study, perhaps some of the main concepts are X, Y, and Z. Note these concepts and then write a brief summary about how the article incorporates them. In reviews that introduce a study, these can be relatively short. In stand-alone reviews, there may be significantly more texts and more concepts.

Step 5: Demonstrate how these concepts in the literature relate to what you discovered in your study or how the literature connects the concepts or topics being discussed.

In a literature review intro for an article, this information might include a summary of the results or methods of previous studies that correspond to and/or confirm those sections in your own study. For a stand-alone literature review, this may mean highlighting the concepts in each article and showing how they strengthen a hypothesis or show a pattern.

Discuss unaddressed issues in previous studies. These studies that are missing something you address are important to include in your literature review. In addition, those works whose theories and conclusions directly support your findings will be valuable to review here.

Step 6: Identify relationships in the literature and develop and connect your own ideas to them.

This is essentially the same as step 5 but focused on the connections between the literature and the current study or guiding concepts or arguments of the paper, not only on the connections between the works themselves.

Your hypothesis, argument, or guiding concept is the “golden thread” that will ultimately tie the works together and provide readers with specific insights they didn’t have before reading your literature review. Make sure you know where to put the research question , hypothesis, or statement of the problem in your research paper so that you guide your readers logically and naturally from your introduction of earlier work and evidence to the conclusions you want them to draw from the bigger picture.

Your literature review will not only cover publications on your topics but will include your own ideas and contributions. By following these steps you will be telling the specific story that sets the background and shows the significance of your research and you can turn a network of related works into a focused review of the literature.

Literature Review (RRL) Examples

Because creating sample literature reviews would take too long and not properly capture the nuances and detailed information needed for a good review, we have included some links to different types of literature reviews below. You can find links to more literature reviews in these categories by visiting the TUS Library’s website . Sample literature reviews as part of an article, dissertation, or thesis:

  • Critical Thinking and Transferability: A Review of the Literature (Gwendolyn Reece)
  • Building Customer Loyalty: A Customer Experience Based Approach in a Tourism Context (Martina Donnelly)

Sample stand-alone literature reviews

  • Literature Review on Attitudes towards Disability (National Disability Authority)
  • The Effects of Communication Styles on Marital Satisfaction (Hannah Yager)

Additional Literature Review Format Guidelines

In addition to the content guidelines above, authors also need to check which style guidelines to use ( APA , Chicago, MLA, etc.) and what specific rules the target journal might have for how to structure such articles or how many studies to include—such information can usually be found on the journals’ “Guide for Authors” pages. Additionally, use one of the four Wordvice citation generators below, choosing the citation style needed for your paper:

Wordvice Writing and Academic Editing Resources

Finally, after you have finished drafting your literature review, be sure to receive professional proofreading services , including paper editing for your academic work. A competent proofreader who understands academic writing conventions and the specific style guides used by academic journals will ensure that your paper is ready for publication in your target journal.

See our academic resources for further advice on references in your paper , how to write an abstract , how to write a research paper title, how to impress the editor of your target journal with a perfect cover letter , and dozens of other research writing and publication topics.

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Literature Review: Purpose of a Literature Review

  • Literature Review
  • Purpose of a Literature Review
  • Work in Progress
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  • Books, Articles, & Web Pages
  • Types of Literature Reviews
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  • Know the Difference! Systematic Review vs. Literature Review

The purpose of a literature review is to:

  • Provide a foundation of knowledge on a topic
  • Identify areas of prior scholarship to prevent duplication and give credit to other researchers
  • Identify inconstancies: gaps in research, conflicts in previous studies, open questions left from other research
  • Identify the need for additional research (justifying your research)
  • Identify the relationship of works in the context of their contribution to the topic and other works
  • Place your own research within the context of existing literature, making a case for why further study is needed.

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VIDEO: What is the role of a literature review in research? What's it mean to "review" the literature? Get the big picture of what to expect as part of the process. This video is published under a Creative Commons 3.0 BY-NC-SA US license. License, credits, and contact information can be found here: https://www.lib.ncsu.edu/tutorials/litreview/

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Understanding the importance of a literature review in research

  • March 29, 2023

review of literature relevance

Gerald Naepi

When conducting research, a literature review plays a crucial role as it provides an overview of the existing literature related to a specific topic. Its main objective is to identify the gaps in the current knowledge and provide direction for future research. This article delves into the purpose and structure of a literature review, along with the various types of literature reviews typically employed in research. By familiarising themselves with the different types of literature reviews and their unique features, researchers can determine which review type would best suit their research question and help them achieve their desired results.

Purpose of a literature review in research

The primary goal of a literature review in research is to offer a comprehensive overview of the relevant research within a given area. A well-executed literature review should provide readers with a clear understanding of the theoretical and empirical contributions made in the field, while also highlighting areas that require further exploration or investigation. Additionally, literature reviews help researchers identify gaps in existing knowledge that can lead to new hypotheses or questions for future study.

When conducting a literature review, researchers should pay close attention to key themes and topics covered by previous studies, including the approaches used to answer specific questions or address particular issues. This ensures that any conclusions drawn by the researcher are supported by established evidence and build on prior work in the field. Moreover, when synthesising information from multiple studies, researchers should aim to identify conflicting opinions or discrepancies in the literature and draw implications for further study. Through this process, a comprehensive literature review can provide invaluable insights into the current state of research and inform future studies.

review of literature relevance

Literature review format

The format of a literature review in research typically consists of the following elements:

Introduction: The introduction is an important part of a literature review, as it gives the reader a sense of what to expect. It should start with a clear statement of the research question or objective, so that the reader understands what the review is trying to achieve. It’s also important to explain why the topic is important, so that the reader understands the relevance of the review. Finally, the introduction should give the reader an overview of the structure and organisation of the review, so that they can easily navigate through the rest of the content.

Search Strategy: The search strategy should be comprehensive, focused, and systematic. It involves selecting appropriate databases, developing effective search terms, and utilizing other sources to collect information. To begin, the researcher needs to determine the most relevant databases to search. Depending on the topic, discipline, and research question, different databases may be more suitable. Some commonly used databases are PubMed, Scopus, Web of Science, and Google Scholar. Once the databases are selected, the researcher can develop a set of search terms that accurately reflect the topic and research question. These search terms can be a combination of keywords and subject headings. Other sources of information may include reference lists, grey literature, conference proceedings, and experts in the field. These sources can provide additional insights and help to ensure a comprehensive search.

The search strategy should be documented in detail to enable replication and transparency. This documentation should include the databases searched, search terms used, search dates, and any filters or limits applied. By having a clear and systematic search strategy, the researcher can ensure that they have identified all relevant literature and that the research findings are reliable and valid.

Inclusion and Exclusion Criteria: Inclusion criteria refer to the characteristics that a study must have to be included in the review, while exclusion criteria refer to the characteristics that disqualify a study from being included. The inclusion and exclusion criteria may vary depending on the research question, but generally, they should be clearly defined and stated in the methods section of the review. Common criteria include study design, population, intervention or exposure, and outcome measures. For example, a systematic review on the effectiveness of a particular drug for a specific condition may include only randomized controlled trials (RCTs) with a minimum sample size of 50 participants, and exclude non-randomized studies or studies with a high risk of bias.

Defining clear inclusion and exclusion criteria is crucial in ensuring that the studies included in the review are relevant, appropriate, and of high quality. It also helps to minimize bias and enhance the validity of the review’s findings. Additionally, transparent reporting of inclusion and exclusion criteria allows readers to assess the rigor of the review process and the generalizability of the findings to their own context.

Methodology: The methodology section typically involves outlining the procedures and techniques employed to collect relevant data and information, including any data extraction forms that were used. Additionally, this section may also include information about the process of data extraction, such as how the data was collected, coded, and analysed. Furthermore, it is essential to include a description of the quality assessment process used to ensure that the extracted data was reliable and valid. This may involve explaining the criteria used to evaluate the quality of the studies, as well as any potential biases or limitations that were taken into consideration. By providing a thorough description of the methodology, readers will be able to assess the rigor of the research and better understand the context and implications of the findings.

Results: The results section summarises the main outcomes and findings of the review process, including the key themes, concepts, and trends identified in the literature. The results section provides a clear and concise description of the analysed data and should be presented in a logical and organized manner to make it easy for readers to understand. The results section of a literature review provides an overview of the evidence and information obtained from the analysed sources and explains how the findings support or challenge the research question or hypothesis. It is essential to ensure that the results are presented accurately, and any limitations or weaknesses of the study are acknowledged to provide a transparent and objective review of the literature.

Discussion: The discussion section of a literature review in research is an important component that provides a critical analysis of the literature reviewed in the study. This section allows the researcher to present their findings and interpretations of the literature, as well as to draw conclusions about the research question or problem being investigated. In the discussion section, the researcher will typically summarise the key findings of the literature review and then discuss these findings in relation to the research question or problem. The discussion section may also identify gaps in the literature and suggest areas for further research, as well as discuss the implications of the findings for theory, practice, or policy. Ultimately, the discussion section of a literature review should provide a comprehensive and insightful analysis of the literature reviewed, which contributes to the overall understanding of the research question or problem at hand.

Conclusion: The conclusion section in a literature review summarises the key findings and implications of the reviewed studies. It is the final part of the literature review that brings together all the main points and themes discussed in the previous sections. In this section, the researcher should provide a critical evaluation of the reviewed literature, highlighting the strengths and limitations of the studies, and how they relate to the research question or problem. The conclusion section should also address any gaps or inconsistencies in the existing literature and suggest future research directions. Furthermore, it should provide a clear and concise summary of the main findings and their significance for the field of study.

References: The reference section provides a comprehensive list of all the sources that have been cited in the literature review, including books, journal articles, reports, and other relevant materials. The purpose of the reference section is to give credit to the authors whose work has been used to support the arguments and ideas presented in the paper. Additionally, the reference section allows readers to locate and retrieve the sources that have been cited, which can help them further explore the topic or verify the accuracy of the information presented. The reference section is typically organized in alphabetical order by the last name of the first author of each source, and it includes all of the necessary bibliographic information such as the title of the work, the name of the journal or book, the date of publication, and the page numbers

Download our literature review template

review of literature relevance

Types of literature review in research

Literature reviews in research can be conducted for a variety of reasons, including to gain a comprehensive understanding of a topic, to identify research gaps, or to support the development of research proposals.

Here are the different types of literature reviews in research:

  • Narrative Literature Review: A narrative literature review is an overview of the literature on a specific topic or research question that does not follow a structured or systematic approach. It is a qualitative review that summarizes and synthesizes the findings from different studies.
  • Systematic Literature Review: A systematic literature review is a rigorous and structured approach to reviewing literature that involves a comprehensive search strategy, inclusion/exclusion criteria, and critical appraisal of the quality of evidence. It involves a meta-analysis and quantitative synthesis of data from multiple studies.
  • Meta-analysis: A meta-analysis is a quantitative review of the literature that involves statistical analysis of the data from multiple studies. It combines the results of different studies to produce an overall estimate of the effect size of a particular intervention or treatment.
  • Scoping Review: A scoping review is a type of literature review that aims to map the existing literature on a topic, identify research gaps, and provide an overview of the evidence. It is useful when the research question is broad or unclear.
  • Rapid Review: A rapid review is a type of systematic review that uses streamlined methods to quickly and efficiently review the literature. It is useful when there is a time constraint or when there is a need to update a previous review.
  • Umbrella Review: An umbrella review is a type of systematic review that synthesizes the findings of multiple systematic reviews on a particular topic. It provides a higher level of evidence by combining the findings from multiple studies.
  • Critical Review: A critical review involves the evaluation and analysis of the strengths and weaknesses of the literature on a particular topic. It assesses the quality, credibility, and relevance of the literature and identifies research gaps.

Literature review example:

A literature review can play a crucial role in connecting with qualitative talanoa research. Talanoa is a research approach that emphasises collaboration, dialogue, and relationships within Pacific communities. Conducting a thorough literature review can help researchers to identify existing knowledge and gaps in ta specific field. This can inform the design of Talanoa research that centers on community engagement and dialogue. By reviewing literature that focuses on Pacific cultures, histories, and knowledge systems, researchers can develop a deeper understanding of the context and values of the community they are working with. This can help to build trust and establish meaningful relationships between researchers and community members.

An example of a literature review is our social research on Pacific peoples’ concerns about COVID-19, titled “The $7 cabbage dilemma: Pacific peoples’ experiences and New Zealand’s COVID-19 response.pdf” The objective of our study was to investigate how the COVID-19 pandemic impacted the wellbeing of Pacific peoples in New Zealand. To accomplish this, we conducted a comprehensive literature review of existing research on Pacific peoples’ urban climate change, health, economy, and housing in New Zealand. Through our talanoa-based research, we discovered that many Pacific peoples were worried about the cost of living, access to healthcare, support for parents, and affordable healthy food options, which were all connected to the broader themes of urban climate change, health, economy, and housing that we had identified in our literature review.

In conclusion, a literature review is an essential component of research as it helps to identify gaps in existing knowledge, provide direction for future research and support or challenge research questions or hypotheses. The purpose of a literature review is to offer a comprehensive overview of the relevant research within a given area, identify key themes and topics, and synthesize information from multiple studies. Researchers need to pay attention to the different types of literature reviews and their unique features when conducting literature reviews to determine which review type would best suit their research question and help them achieve their desired results. A well-structured literature review should include an introduction, search strategy, inclusion and exclusion criteria, methodology and results sections. A well-executed literature review ensures that the research findings are reliable and valid and provides invaluable insights into the current state of research to inform future studies.

           

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Literature Review

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The purpose of a literature review is to collect relevant, timely research on your chosen topic, and synthesize it into a cohesive summary of existing knowledge in the field. This then prepares you for making your own argument on that topic, or for conducting your own original research.

Depending on your field of study, literature reviews can take different forms. Some disciplines require that you synthesize your sources topically, organizing your paragraphs according to how your different sources discuss similar topics. Other disciplines require that you discuss each source in individual paragraphs, covering various aspects in that single article, chapter, or book.

Within your review of a given source, you can cover many different aspects, including (if a research study) the purpose, scope, methods, results, any discussion points, limitations, and implications for future research. Make sure you know which model your professor expects you to follow when writing your own literature reviews.

Tip : Literature reviews may or may not be a graded component of your class or major assignment, but even if it is not, it is a good idea to draft one so that you know the current conversations taking place on your chosen topic. It can better prepare you to write your own, unique argument.

Benefits of Literature Reviews

  • Literature reviews allow you to gain familiarity with the current knowledge in your chosen field, as well as the boundaries and limitations of that field.
  • Literature reviews also help you to gain an understanding of the theory(ies) driving the field, allowing you to place your research question into context.
  • Literature reviews provide an opportunity for you to see and even evaluate successful and unsuccessful assessment and research methods in your field.
  • Literature reviews prevent you from duplicating the same information as others writing in your field, allowing you to find your own, unique approach to your topic.
  • Literature reviews give you familiarity with the knowledge in your field, giving you the chance to analyze the significance of your additional research.

Choosing Your Sources

When selecting your sources to compile your literature review, make sure you follow these guidelines to ensure you are working with the strongest, most appropriate sources possible.

Topically Relevant

Find sources within the scope of your topic

Appropriately Aged

Find sources that are not too old for your assignment

Find sources whose authors have authority on your topic

Appropriately “Published”

Find sources that meet your instructor’s guidelines (academic, professional, print, etc.)

Tip:  Treat your professors and librarians as experts you can turn to for advice on how to locate sources. They are a valuable asset to you, so take advantage of them!

Organizing Your Literature Review

Synthesizing topically.

Some assignments require discussing your sources together, in paragraphs organized according to shared topics between them.

For example, in a literature review covering current conversations on Alison Bechdel’s  Fun Home , authors may discuss various topics including:

  • her graphic style
  • her allusions to various literary texts
  • her story’s implications regarding LGBT experiences in 20 th  century America.

In this case, you would cluster your sources on these three topics. One paragraph would cover how the sources you collected dealt with Bechdel’s graphic style. Another, her allusions. A third, her implications.

Each of these paragraphs would discuss how the sources you found treated these topics in connection to one another. Basically, you compare and contrast how your sources discuss similar issues and points.

To determine these shared topics, examine aspects including:

  • Definition of terms
  • Common ground
  • Issues that divide
  • Rhetorical context

Summarizing Individually

Depending on the assignment, your professor may prefer that you discuss each source in your literature review individually (in their own, separate paragraphs or sections). Your professor may give you specific guidelines as far as what to cover in these paragraphs/sections.

If, for instance, your sources are all primary research studies, here are some aspects to consider covering:

  • Participants
  • Limitations
  • Implications
  • Significance

Each section of your literature review, in this case, will identify all of these elements for each individual article.

You may or may not need to separate your information into multiple paragraphs for each source. If you do, using proper headings in the appropriate citation style (APA, MLA, etc.) will help keep you organized.

If you are writing a literature review as part of a larger assignment, you generally do not need an introduction and/or conclusion, because it is embedded within the context of your larger paper.

If, however, your literature review is a standalone assignment, it is a good idea to include some sort of introduction and conclusion to provide your reader with context regarding your topic, purpose, and any relevant implications or further questions. Make sure you know what your professor is expecting for your literature review’s content.

Typically, a literature review concludes with a full bibliography of your included sources. Make sure you use the style guide required by your professor for this assignment.

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Conducting a Literature Review

Benefits of conducting a literature review.

  • Steps in Conducting a Literature Review
  • Summary of the Process
  • Additional Resources
  • Literature Review Tutorial by American University Library
  • The Literature Review: A Few Tips On Conducting It by University of Toronto
  • Write a Literature Review by UC Santa Cruz University Library

While there might be many reasons for conducting a literature review, following are four key outcomes of doing the review.

Assessment of the current state of research on a topic . This is probably the most obvious value of the literature review. Once a researcher has determined an area to work with for a research project, a search of relevant information sources will help determine what is already known about the topic and how extensively the topic has already been researched.

Identification of the experts on a particular topic . One of the additional benefits derived from doing the literature review is that it will quickly reveal which researchers have written the most on a particular topic and are, therefore, probably the experts on the topic. Someone who has written twenty articles on a topic or on related topics is more than likely more knowledgeable than someone who has written a single article. This same writer will likely turn up as a reference in most of the other articles written on the same topic. From the number of articles written by the author and the number of times the writer has been cited by other authors, a researcher will be able to assume that the particular author is an expert in the area and, thus, a key resource for consultation in the current research to be undertaken.

Identification of key questions about a topic that need further research . In many cases a researcher may discover new angles that need further exploration by reviewing what has already been written on a topic. For example, research may suggest that listening to music while studying might lead to better retention of ideas, but the research might not have assessed whether a particular style of music is more beneficial than another. A researcher who is interested in pursuing this topic would then do well to follow up existing studies with a new study, based on previous research, that tries to identify which styles of music are most beneficial to retention.

Determination of methodologies used in past studies of the same or similar topics.  It is often useful to review the types of studies that previous researchers have launched as a means of determining what approaches might be of most benefit in further developing a topic. By the same token, a review of previously conducted studies might lend itself to researchers determining a new angle for approaching research.

Upon completion of the literature review, a researcher should have a solid foundation of knowledge in the area and a good feel for the direction any new research should take. Should any additional questions arise during the course of the research, the researcher will know which experts to consult in order to quickly clear up those questions.

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  • How to Write a Literature Review | Guide, Examples, & Templates

How to Write a Literature Review | Guide, Examples, & Templates

Published on January 2, 2023 by Shona McCombes . Revised on September 11, 2023.

What is a literature review? A literature review is a survey of scholarly sources on a specific topic. It provides an overview of current knowledge, allowing you to identify relevant theories, methods, and gaps in the existing research that you can later apply to your paper, thesis, or dissertation topic .

There are five key steps to writing a literature review:

  • Search for relevant literature
  • Evaluate sources
  • Identify themes, debates, and gaps
  • Outline the structure
  • Write your literature review

A good literature review doesn’t just summarize sources—it analyzes, synthesizes , and critically evaluates to give a clear picture of the state of knowledge on the subject.

Table of contents

What is the purpose of a literature review, examples of literature reviews, step 1 – search for relevant literature, step 2 – evaluate and select sources, step 3 – identify themes, debates, and gaps, step 4 – outline your literature review’s structure, step 5 – write your literature review, free lecture slides, other interesting articles, frequently asked questions, introduction.

  • Quick Run-through
  • Step 1 & 2

When you write a thesis , dissertation , or research paper , you will likely have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:

  • Demonstrate your familiarity with the topic and its scholarly context
  • Develop a theoretical framework and methodology for your research
  • Position your work in relation to other researchers and theorists
  • Show how your research addresses a gap or contributes to a debate
  • Evaluate the current state of research and demonstrate your knowledge of the scholarly debates around your topic.

Writing literature reviews is a particularly important skill if you want to apply for graduate school or pursue a career in research. We’ve written a step-by-step guide that you can follow below.

Literature review guide

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Writing literature reviews can be quite challenging! A good starting point could be to look at some examples, depending on what kind of literature review you’d like to write.

  • Example literature review #1: “Why Do People Migrate? A Review of the Theoretical Literature” ( Theoretical literature review about the development of economic migration theory from the 1950s to today.)
  • Example literature review #2: “Literature review as a research methodology: An overview and guidelines” ( Methodological literature review about interdisciplinary knowledge acquisition and production.)
  • Example literature review #3: “The Use of Technology in English Language Learning: A Literature Review” ( Thematic literature review about the effects of technology on language acquisition.)
  • Example literature review #4: “Learners’ Listening Comprehension Difficulties in English Language Learning: A Literature Review” ( Chronological literature review about how the concept of listening skills has changed over time.)

You can also check out our templates with literature review examples and sample outlines at the links below.

Download Word doc Download Google doc

Before you begin searching for literature, you need a clearly defined topic .

If you are writing the literature review section of a dissertation or research paper, you will search for literature related to your research problem and questions .

Make a list of keywords

Start by creating a list of keywords related to your research question. Include each of the key concepts or variables you’re interested in, and list any synonyms and related terms. You can add to this list as you discover new keywords in the process of your literature search.

  • Social media, Facebook, Instagram, Twitter, Snapchat, TikTok
  • Body image, self-perception, self-esteem, mental health
  • Generation Z, teenagers, adolescents, youth

Search for relevant sources

Use your keywords to begin searching for sources. Some useful databases to search for journals and articles include:

  • Your university’s library catalogue
  • Google Scholar
  • Project Muse (humanities and social sciences)
  • Medline (life sciences and biomedicine)
  • EconLit (economics)
  • Inspec (physics, engineering and computer science)

You can also use boolean operators to help narrow down your search.

Make sure to read the abstract to find out whether an article is relevant to your question. When you find a useful book or article, you can check the bibliography to find other relevant sources.

You likely won’t be able to read absolutely everything that has been written on your topic, so it will be necessary to evaluate which sources are most relevant to your research question.

For each publication, ask yourself:

  • What question or problem is the author addressing?
  • What are the key concepts and how are they defined?
  • What are the key theories, models, and methods?
  • Does the research use established frameworks or take an innovative approach?
  • What are the results and conclusions of the study?
  • How does the publication relate to other literature in the field? Does it confirm, add to, or challenge established knowledge?
  • What are the strengths and weaknesses of the research?

Make sure the sources you use are credible , and make sure you read any landmark studies and major theories in your field of research.

You can use our template to summarize and evaluate sources you’re thinking about using. Click on either button below to download.

Take notes and cite your sources

As you read, you should also begin the writing process. Take notes that you can later incorporate into the text of your literature review.

It is important to keep track of your sources with citations to avoid plagiarism . It can be helpful to make an annotated bibliography , where you compile full citation information and write a paragraph of summary and analysis for each source. This helps you remember what you read and saves time later in the process.

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To begin organizing your literature review’s argument and structure, be sure you understand the connections and relationships between the sources you’ve read. Based on your reading and notes, you can look for:

  • Trends and patterns (in theory, method or results): do certain approaches become more or less popular over time?
  • Themes: what questions or concepts recur across the literature?
  • Debates, conflicts and contradictions: where do sources disagree?
  • Pivotal publications: are there any influential theories or studies that changed the direction of the field?
  • Gaps: what is missing from the literature? Are there weaknesses that need to be addressed?

This step will help you work out the structure of your literature review and (if applicable) show how your own research will contribute to existing knowledge.

  • Most research has focused on young women.
  • There is an increasing interest in the visual aspects of social media.
  • But there is still a lack of robust research on highly visual platforms like Instagram and Snapchat—this is a gap that you could address in your own research.

There are various approaches to organizing the body of a literature review. Depending on the length of your literature review, you can combine several of these strategies (for example, your overall structure might be thematic, but each theme is discussed chronologically).

Chronological

The simplest approach is to trace the development of the topic over time. However, if you choose this strategy, be careful to avoid simply listing and summarizing sources in order.

Try to analyze patterns, turning points and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred.

If you have found some recurring central themes, you can organize your literature review into subsections that address different aspects of the topic.

For example, if you are reviewing literature about inequalities in migrant health outcomes, key themes might include healthcare policy, language barriers, cultural attitudes, legal status, and economic access.

Methodological

If you draw your sources from different disciplines or fields that use a variety of research methods , you might want to compare the results and conclusions that emerge from different approaches. For example:

  • Look at what results have emerged in qualitative versus quantitative research
  • Discuss how the topic has been approached by empirical versus theoretical scholarship
  • Divide the literature into sociological, historical, and cultural sources

Theoretical

A literature review is often the foundation for a theoretical framework . You can use it to discuss various theories, models, and definitions of key concepts.

You might argue for the relevance of a specific theoretical approach, or combine various theoretical concepts to create a framework for your research.

Like any other academic text , your literature review should have an introduction , a main body, and a conclusion . What you include in each depends on the objective of your literature review.

The introduction should clearly establish the focus and purpose of the literature review.

Depending on the length of your literature review, you might want to divide the body into subsections. You can use a subheading for each theme, time period, or methodological approach.

As you write, you can follow these tips:

  • 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 sentences to draw connections, comparisons and contrasts

In the conclusion, you should summarize the key findings you have taken from the literature and emphasize their significance.

When you’ve finished writing and revising your literature review, don’t forget to proofread thoroughly before submitting. Not a language expert? Check out Scribbr’s professional proofreading services !

This article has been adapted into lecture slides that you can use to teach your students about writing a literature review.

Scribbr slides are free to use, customize, and distribute for educational purposes.

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If you want to know more about the research process , methodology , research bias , or statistics , make sure to check out some of our other articles with explanations and examples.

  • Sampling methods
  • Simple random sampling
  • Stratified sampling
  • Cluster sampling
  • Likert scales
  • Reproducibility

 Statistics

  • Null hypothesis
  • Statistical power
  • Probability distribution
  • Effect size
  • Poisson distribution

Research bias

  • Optimism bias
  • Cognitive bias
  • Implicit bias
  • Hawthorne effect
  • Anchoring bias
  • Explicit bias

A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .

It is often written as part of a thesis, dissertation , or research paper , in order to situate your work in relation to existing knowledge.

There are several reasons to conduct a literature review at the beginning of a research project:

  • To familiarize yourself with the current state of knowledge on your topic
  • To ensure that you’re not just repeating what others have already done
  • To identify gaps in knowledge and unresolved problems that your research can address
  • To develop your theoretical framework and methodology
  • To provide an overview of the key findings and debates on the topic

Writing the literature review shows your reader how your work relates to existing research and what new insights it will contribute.

The literature review usually comes near the beginning of your thesis or dissertation . After the introduction , it grounds your research in a scholarly field and leads directly to your theoretical framework or methodology .

A literature review is a survey of credible sources on a topic, often used in dissertations , theses, and research papers . Literature reviews give an overview of knowledge on a subject, helping you identify relevant theories and methods, as well as gaps in existing research. Literature reviews are set up similarly to other  academic texts , with an introduction , a main body, and a conclusion .

An  annotated bibliography is a list of  source references that has a short description (called an annotation ) for each of the sources. It is often assigned as part of the research process for a  paper .  

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