how to write an literature review

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How to write a literature review

Are you writing a literature review as part of a final year project, dissertation, or thesis, or as a standalone piece of work? This page will work through a process of organising and synthesising your sources and then writing a clear and critical final review.

What is a literature review?

A literature review is an account of the current thinking in a specific area of study. Its purpose is to introduce the reader to what has gone before and often to provide you with a foundation that you can build on with your own research. This traditional form of review is sometimes also referred to as a narrative review.

A literature review will often form a section or chapter of a larger piece of research work, such as a dissertation, thesis, or final year project.  It can also be a standalone piece of work.  

A literature review will usually do some or all of the following:

• Introduce the reader to a specific area of interest.
• Organise relevant sources thematically, starting with the more general, broader themes and narrowing towards the most specific themes.
• Introduce key theories relevant to the area of study.
• Define your understanding of important terms or language used in the research.
• Include only the most relevant, important or influential sources, carefully selected. It is about quality not quantity!
• Identify gaps or limitations in existing research.

Considering a body of scholarship as a whole (or in relation to each of your themes) will allow you to 'synthesise' multiple sources and produce an overall summary.

Developing a literature review will help you to develop a level of expertise in your chosen area. By consulting and including a unique combination of sources, you will be able to formulate an informed and original perspective.  Where relevant, this can drive forward your ongoing research.

Writing a Literature Review workshop: book here

A systematic review is a research methodology, often following a standardised and replicable search method and reporting structure that is specific to your discipline. Visit our guidance on systematic reviews for more information.

Organising your sources

As you encounter more and more relevant sources, you will face an ever-expanding amount of reading for yourself. It would take years to read through all of the literature in a specific field from start to finish.

Academic reading, and particularly the process of 'reading around' a topic, is about selective, or targeted reading. Visit our Reading and understanding information Hub to explore approaches to reading for different purposes.

Creating a Literature Matrix can help you to identify the key things that you want to take away from each source. A literature matrix is a simple spreadsheet where you select column titles to suit the aims of your literature review. Are you interested in the research methodology, the scale of the research, the main conclusions, or something else entirely?

Once you have scanned through a source and pulled out the points you are interested in, you can move onto the next source. Organising your reading in this way will also allow you to identify key themes that are emerging in your reading, which you will be able to use later on to plan your review.

You may want to use a reference management tool to help organise and produce your bibliography. Visit the University of Sheffield Library Reference Management pages here .

Make a copy of our Literature matrix template (Google Sheet) and add/delete columns based on the information you want to collect during your search.  Using a spreadsheet means that you can filter and sort your sources, for example, into chronological order, or alphabetically by author.

This downloadable example literature matrix shows how you can lay out your columns.

Synthesising your sources

Once you have a number of sources to work with, you will start to identify key themes emerging. At this point you can start to organise your sources systematically to develop and explore those themes. Can you organise your themes from the broadest to the narrowest and most specific?

A synthesis matrix will help you to identify a thematic structure for your literature review and to understand how the sources that you have found relate to one another. A synthesis matrix is a further spreadsheet that organises your sources by theme and includes a synthesis column, where you can begin to draw out comparisons between the sources. 

Once you have identified a number of sources for each theme in your matrix, you should be able to identify the following:

• Do the sources build on or develop one another? This may be a chronological process.
• Do the sources challenge or contradict one another? Do they reveal a debate within the field?
• Do the sources identify an area of particular interest or a gap in the field?
• Do the sources help to fill in gaps or complete a bigger picture?

Your synthesis column provides an opportunity for you to comment on multiple sources considered as a whole. It is a space for your critical voice and interpretation, which is a key part of writing a successful literature review.

Make a copy of our synthesis matrix (Google Sheet) to organise your themes and plan how the relevant sources can be synthesised.

Download a completed example synthesis matrix from NC State University (PDF, 34Kb)

Visit our Producing a literature review interactive tutorial - for further guidance.

View tutorial as a DOCX (349 KB)

Writing your review

Once you have done the background reading and organised your sources using a synthesis matrix, the job of writing your review is simply about adding flesh to the bones. You will need to write your review as a narrative account, but you can use your matrix as a framework to help you do so.

A literature review will usually follow a simple structure:

• Introduction: what is the overall topic area and how have you broken your review down into themes?
• Theme 1: the broadest, most top-level area (perhaps including some background theory that may have influenced your thinking).
• Theme 2, theme 3, theme 4, etc. Your themes should get progressively more specific and closer to the focus of your research.
• Conclusion: how has this informed your thinking and (if the review is part of a bigger project) what are your research aims and objectives? 

Your review may be broken down by section headings or be a continuous flow with themes clearly separated in a paragraph structure. Each section or paragraph will describe that theme and finish by summarising your overview of a theme (the synthesis part of the matrix above, which includes your critical analysis). 

Our web page How to structure a paragrap h has further guidance to ensure your paragraphs are clear and contain your synthesis and critical analysis.

For advice and feedback on your own review, including referencing, synthesis and academic arguments, please book a writing advisory service appointment.

Make an appointment (student login required)

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How To Write A Literature Review For A Research Paper | A Comprehensive Guide

Published by Ellie Cross at October 28th, 2024 , Revised On October 29, 2024

A literature review for a research paper or project is a vital part of undergraduate and graduate school. It sets a foundation for your research and showcases your expertise by identifying gaps in the already existing literature and provides an excellent opportunity for researchers and philosophers to examine your evaluations of the studies.

Many confusions exist between literature reviews and other forms of academic papers such as essays, research papers, bibliographies and reports often due to misunderstandings about their meaning and purpose. A literature review is a part of a research paper that examines pieces of information that have already been written about your topic but does not answer any questions, prove points or develop theories. In this blog, we shall develop an understanding of what the purpose of a literature review is, how many parts are of a literature review and some tips on how to write a literature review for a research paper.

What Is A Literature Review?

When writing literature review for research paper, it is necessary to define any previous research conducted on the topic or subject chosen by you. This establishes your credibility and validity as a researcher and author. For instance, if you are crafting a research paper on the effect of creatine intake as a performance enhancer for sports athletes, then you will need to mention prior research studies or papers on the topic and compare how your work adds to the ongoing conversation. This is known as a literature review.

Purpose Of A Literature Review For A Research Paper

It is not only crucial to know how to write a literature review for a research paper but also the purpose behind it. Writing a literature for a research paper requires extensive research of existing literature or sources that align with your topic, defining similar themes, and identifying gaps within the existing work. However, the primary purpose of the literature review is:

• To justify the significance of your study by addressing any contradictions or untouched areas in the previous research that have the potential to break new ground and offer fresh perspectives. This helps shape your research question, which is answered within the research paper.
• To ensure that researchers avoid duplicating previous work, and provide a solid foundation as to how their research builds on already existing scholarly discourse.

How Long Is A Literature Review For A Research Paper

If you are writing a research paper or dissertation, then you must be aware of the length of your section that covers your literature review. There are several factors that determine the length of your literature review for a research paper, some of which are:

• The overall length of your research paper
• The complexity of your topic or subject.
• The specified guidelines or instructions provided by your instructor or journal studies.

Additionally, your literature review should comprise 20 to 30% of your research paper, enough to provide a comprehensive analysis of the existing research on your topic but not overshadow your original research paper and work.

How To Write A Good Literature Review

Before you write, it is necessary to understand how to write a literature review for a research paper and the steps needed to conduct a literature search. It is important to follow these steps to write a good literature review for a research paper:

Step 1: Conduct A Literature Search

The most imperative part of a literature review is defining the topic and subject for your research project and paper. This also involves stating your research question so that relevant studies that address the research questions can be sought for analysis and comparison. Moreover, it is also important to mention the timeframe of your research paper so that readers and researchers can understand if your focus is on historical research work or recent developments.

After defining your research question and scope of work, start finding sources and knowledge that support your work by using online databases, and primary and secondary sources of information. This means conducting a research literature review from internet to paper and going through reliable sources such as library catalogues, articles, published research papers, journals, Google Scholar, JSTOR and EBSCO by using keywords that align with your work.

Step 2: Select Sources

Then comes the second most important part of your literature review. Analysing the relevance and quality of your academic sources is necessary so that irrelevant pieces of information can be discarded. To select the best sources, start by organising similar papers, articles and research projects with themes and keywords that are related to your research question and topic.

Then proceed to compare every source to establish its relevance and credibility. Here are some questions to consider while evaluating each source:

• What are the key findings of this research?
• What are the primary concepts being discussed?
• What are the theories and methods of data collection ?
• What arguments arise from conflicting perspectives?
• How has the researcher addressed the limitations of his research?
• What are the strengths and weaknesses of this research work?
• How does this work relate and differ from other literature in this field?

After selecting credible sources that best align with your research question, take notes for your writing process and do not forget to add citations to avoid plagiarism.

Step 3: Identify Themes & Gaps

A literature review for a research paper must have a clearly defined outline that discusses recurring themes, patterns, core concepts, the methodological approaches used in research and any disagreements and areas lacking research.

By discussing these, you can establish the need for new research that is being addressed by your work, and any influential theories that can change the direction of the research in the field.

Step 4: Write Your Literature Review

Then comes the main part of your literature review and that is the format of literature review for research paper. Like any other academic writing, it comprises three major parts that synthesise and analyse the collected information accordingly. Let’s discuss how a literature review is written:

Introduction

The introduction sets the stage for your literature review and critically highlights the main topic or research question to be addressed. An opening statement briefs the readers about the purpose, objective and scope of your literature review.

An organisational framework of how you found the sources, how they will be included in your work and why your work is important to the field of research is also a vital part of your introductory paragraph. Last, conclude your paragraph with a thesis statement that outlines the main argument to be addressed in the research paper.

The body provides a thorough understanding and analysis of existing literature, the relevant themes, concepts and the methodologies used for research. Start by discussing the recurring trends and patterns in the literature, the common themes that are addressed, and the areas of research that have been left untouched.

Instead of paraphrasing other researchers, try to add your own opinions and interpretations. Additionally, evaluate the strengths and weaknesses of the prior research and how to overcome the challenges for future researchers. You can also discuss how your review contributes to filling the gaps. Moreover, use transition sentences and phrases to create a smooth transition and flow between paragraphs.

The final part of writing a literature review concludes your evaluation by mentioning the key findings and results from the literature and its relevance to the broader academic field. Also, a good conclusion in a literature review explores the implications or discrepancies of the findings to future research and discusses potential directions and tips for research in the field.

Step 5: Editing and Proofreading

After you have written your first draft, proofread and edit your content to ensure that it is error-free, factually correct, grammatically coherent and well-cited. You may revise it as needed and make any changes. It many be helpful to get feedback from peers, instructors and researchers from your field for a more critical analysis.

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Difference Between A Literature Review And A Research Paper

A literature review sets the foundation for new research by evaluating and analysing already existing knowledge, but on the other hand, a research paper provides new knowledge by conducting original research. Moreover, they differ from each other in various aspects, which are as follows:

Example Of Literature Review Research Paper

Here is a literature review sample in the research paper that serves as an excellent example for your understanding:

The impact of AI-based tools on student creativity.

Literature Review

Artificial Intelligence has emerged as a marvellous tool in the educational and academic landscape. Through its innovative nature, it has helped students and researchers with learning, getting tasks done effectively and extracting better academic content. However, its integration into education has raised concerns all over the world as the creativity skills of students have been put at risk.

According to Brown et al. (2020), AI-driven tools have stifled the originality of students and eroded their critical thinking skills by offering automated essays and content generation.

Similarly, Johnson (2020) observed an over-reliance on AI tools for repetitive tasks such as user-generated content. Moreover, with the increase in their usage, students plagiarise most of the content in their academic essay writings, which blurs the lines between human-written and AI-produced content. This has raised ethical concerns over academic integrity as it creates a false sense of achievement in the minds of students.

Despite these findings, there are significant gaps in their research. These studies primarily focused on AI’s impact on student creativity in isolation without considering broader themes of educational curriculum and teacher guidance. Moreover, little to no research has been explored as to how different AI tools effect the innovative capabilities of students. By evaluating prior research, we aim to provide a comprehensive understanding of the implications and benefits of the role of AI within the context of proper teacher guidance and well-defined educational curriculums.

Frequently Asked Questions 

How many literature reviews in research papers exist.

There are three types of literature reviews for a research paper or dissertation: 

• Chronological Literature Review 
• Thematic Literature Review 
• Methodological Literature Review 
• Theoretical Literature Review 
• Systematic Literature Review Research Paper 

Is the information in a literature review synthesised or summarised?

In a literature review, information from previous research is synthesised which means that it is re-organised, re-shuffled and re-interpreted for the purpose of creating new knowledge or addressing research gaps. Remember, summarising is just mentioning the important or key ideas of information which is not part of a literature review. 

What is the express method of writing a literature review for a research paper?

An express method of writing a literature review is used when the scope of the research is narrow or a researcher has limited time. It involves synthesising and organising key points and concepts of existing research. It is important to know that it does not provide an in-depth analysis as compared to the traditional manner of writing a literature review. 

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The numerical information and data gathered by using statistical, computational and mathematical techniques is known as quantitative research.

Primary research deals with research that is objective and accurate by collecting first-hand data & information on a specific subject.

Qualitative research uses surveys, interviews, observations, and case studies to gather and analyse data to create meaningful conclusions.

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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.