what are the types of article review

Aims to demonstrate writer has extensively researched literature and critically evaluated its quality. Goes beyond mere description to include degree of analysis and conceptual innovation. Typically results in hypothesis or mode

Seeks to identify most significant items in the field

No formal quality assessment. Attempts to evaluate according to contribution

Typically narrative, perhaps conceptual or chronological

Significant component: seeks to identify conceptual contribution to embody existing or derive new theory

Generic term: published materials that provide examination of recent or current literature. Can cover wide range of subjects at various levels of completeness and comprehensiveness. May include research findings

May or may not include comprehensive searching

May or may not include quality assessment

Typically narrative

Analysis may be chronological, conceptual, thematic, etc.

Map out and categorize existing literature from which to commission further reviews and/or primary research by identifying gaps in research literature

Completeness of searching determined by time/scope constraints

No formal quality assessment

May be graphical and tabular

Characterizes quantity and quality of literature, perhaps by study design and other key features. May identify need for primary or secondary research

Technique that statistically combines the results of quantitative studies to provide a more precise effect of the results

Aims for exhaustive, comprehensive searching. May use funnel plot to assess completeness

Quality assessment may determine inclusion/ exclusion and/or sensitivity analyses

Graphical and tabular with narrative commentary

Numerical analysis of measures of effect assuming absence of heterogeneity

Refers to any combination of methods where one significant component is a literature review (usually systematic). Within a review context it refers to a combination of review approaches for example combining quantitative with qualitative research or outcome with process studies

Requires either very sensitive search to retrieve all studies or separately conceived quantitative and qualitative strategies

Requires either a generic appraisal instrument or separate appraisal processes with corresponding checklists

Typically both components will be presented as narrative and in tables. May also employ graphical means of integrating quantitative and qualitative studies

Analysis may characterise both literatures and look for correlations between characteristics or use gap analysis to identify aspects absent in one literature but missing in the other

Generic term: summary of the [medical] literature that attempts to survey the literature and describe its characteristics

May or may not include comprehensive searching (depends whether systematic overview or not)

May or may not include quality assessment (depends whether systematic overview or not)

Synthesis depends on whether systematic or not. Typically narrative but may include tabular features

Analysis may be chronological, conceptual, thematic, etc.

Method for integrating or comparing the findings from qualitative studies. It looks for ‘themes’ or ‘constructs’ that lie in or across individual qualitative studies

May employ selective or purposive sampling

Quality assessment typically used to mediate messages not for inclusion/exclusion

Qualitative, narrative synthesis

Thematic analysis, may include conceptual models

Assessment of what is already known about a policy or practice issue, by using systematic review methods to search and critically appraise existing research

Completeness of searching determined by time constraints

Time-limited formal quality assessment

Typically narrative and tabular

Quantities of literature and overall quality/direction of effect of literature

Preliminary assessment of potential size and scope of available research literature. Aims to identify nature and extent of research evidence (usually including ongoing research)

Completeness of searching determined by time/scope constraints. May include research in progress

No formal quality assessment

Typically tabular with some narrative commentary

Characterizes quantity and quality of literature, perhaps by study design and other key features. Attempts to specify a viable review

Tend to address more current matters in contrast to other combined retrospective and current approaches. May offer new perspectives

Aims for comprehensive searching of current literature

No formal quality assessment

Typically narrative, may have tabular accompaniment

Current state of knowledge and priorities for future investigation and research

Seeks to systematically search for, appraise and synthesis research evidence, often adhering to guidelines on the conduct of a review

Aims for exhaustive, comprehensive searching

Quality assessment may determine inclusion/exclusion

Typically narrative with tabular accompaniment

What is known; recommendations for practice. What remains unknown; uncertainty around findings, recommendations for future research

Combines strengths of critical review with a comprehensive search process. Typically addresses broad questions to produce ‘best evidence synthesis’

Aims for exhaustive, comprehensive searching

May or may not include quality assessment

Minimal narrative, tabular summary of studies

What is known; recommendations for practice. Limitations

Attempt to include elements of systematic review process while stopping short of systematic review. Typically conducted as postgraduate student assignment

May or may not include comprehensive searching

May or may not include quality assessment

Typically narrative with tabular accompaniment

What is known; uncertainty around findings; limitations of methodology

Specifically refers to review compiling evidence from multiple reviews into one accessible and usable document. Focuses on broad condition or problem for which there are competing interventions and highlights reviews that address these interventions and their results

Identification of component reviews, but no search for primary studies

Quality assessment of studies within component reviews and/or of reviews themselves

Graphical and tabular with narrative commentary

What is known; recommendations for practice. What remains unknown; recommendations for future research

Reproduced from Grant MJ, Booth A. A typology of reviews: an analysis of 14 review types and associated methodologies . Health Info Libr J. 2009 Jun;26(2):91-108. doi: 10.1111/j.1471-1842.2009.00848.x

• Last Updated: Sep 6, 2024 12:39 PM
• URL: https://guides.lib.utexas.edu/systematicreviews

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Evidence Syntheses (Scoping, systematic, & other types of reviews)

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Types of literature reviews.

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This guide focuses on the methodology for systematic reviews (SRs), but an SR may not be the best methodology to use to meet your project's goals. Use the articles listed here or in the Types of Literature Reviews box below for information about additional methodologies that could better fit your project. 

• Haddaway NR, Lotfi T, Mbuagbaw L. Systematic reviews: A glossary for public health . Scand J Public Health. 2022 Feb 9:14034948221074998. doi: 10.1177/14034948221074998. Epub ahead of print. PMID: 35139715.
• Grant MJ, Booth A. A typology of reviews: an analysis of 14 review types and associated methodologies . Health Info Libr J. 2009 Jun;26(2):91-108. Defines 14 types of reviews and provides a helpful summary table on pp. 94-95.
• Sutton A, Clowes M, Preston L, Booth A. Meeting the review family: exploring review types and associated information retrieval requirements . Health Info Libr J . 2019;36(3):202–222. doi:10.1111/hir.12276
• If you're not sure what type of review is right for your quantitative review, use this tool to find the best methodology for your project, What Review is Right for You? https://whatreviewisrightforyou.knowledgetranslation.net

Systematic Reviews

Meta-Analyses

• Comparative Effectiveness
• systematically and transparently searches for a broad range of information to synthesize, in order to find the effect of an intervention.
• uses a protocol 
• has a clear data extraction and management plan.
• Time-intensive and often take months to a year or more to complete, even with a multi-person team. 

NOTE: The term "systematic review" is also used incorrectly as a blanket term for other types of reviews.

Methodological Guidance

• Finding What Works in Health Care: Standards for Systematic Reviews. 2011. Institute of Medicine. http://books.nap.edu/openbook.php?record_id=13059
• Cochrane Handbook of Systematic Reviews of Interventions, v. 6. 2019. https://training.cochrane.org/handbook
• The Joanna Briggs Reviewers Manual. 2024. https://jbi-global-wiki.refined.site/space/MANUAL
• The Community Guide/Methods/Systematic Review Methods. 2014. The Community Preventive Services Task Force. http://www.thecommunityguide.org/about/methods.html

For issues in systematic reviews, especially in social science or other qualitative research: 

• Some Potential "Pitfalls" in the Construction of Educational Systematic Reviews. https://doi.org/10.1007/s40596-017-0675-7
• Lescoat, A., Murphy, S. L., Roofeh, D., et al. (2021). Considerations for a combined index for limited cutaneous systemic sclerosis to support drug development and improve outcomes. https://doi.org/10.1177/2397198320961967
• DeLong, M. R., Tandon, V. J., Bertrand, A. A. (2021). Review of Outcomes in Prepectoral Prosthetic Breast Reconstruction with and without Surgical Mesh Assistance.  https://pubmed.ncbi.nlm.nih.gov/33177453/
• Carey, M. R., Vaughn, V. M., Mann, J. (2020). Is Non-Steroidal Anti-Inflammatory Therapy Non-Inferior to Antibiotic Therapy in Uncomplicated Urinary Tract Infections: a Systematic Review.  https://pubmed.ncbi.nlm.nih.gov/32270403/
• Statistical technique for combining the findings from disparate  quantitative studies.
• Uses statistical methods to objectively evaluate, synthesize, and summarize results.
• May be conducted independently or as part of a systematic review.
• Cochrane Handbook, Ch 10: Analysing data and undertaking meta-analyses https://training.cochrane.org/handbook/current/chapter-10
• Bauer, M. E., Toledano, R. D., Houle, T., et al. (2020). Lumbar neuraxial procedures in thrombocytopenic patients across populations: A systematic review and meta-analysis. https://pubmed.ncbi.nlm.nih.gov/31810860/ 6
• Mailoa J, Lin GH, Khoshkam V, MacEachern M, et al. Long-Term Effect of Four Surgical Periodontal Therapies and One Non-Surgical Therapy: A Systematic Review and Meta-Analysis. https://pubmed.ncbi.nlm.nih.gov/26110453/

Umbrella Reviews

• Reviews other systematic reviews on a topic. 
• Often defines a broader question than is typical of a traditional systematic review.
• Most useful when there are competing interventions to consider.
• Ioannidis JP. Integration of evidence from multiple meta-analyses: a primer on umbrella reviews, treatment networks and multiple treatments meta-analyses .  https://pubmed.ncbi.nlm.nih.gov/35081993
• Aromataris, E., Fernandez, R., Godfrey, C. M., Holly, C., Khalil, H., & Tungpunkom, P.  2015 Methodology for JBI Umbrella Reviews. https://ro.uow.edu.au/cgi/viewcontent.cgi?articl.
• Gastaldon, C., Solmi, M., Correll, C. U., et al. (2022). Risk factors of postpartum depression and depressive symptoms: umbrella review of current evidence from systematic reviews and meta-analyses of observational studies. https://pubmed.ncbi.nlm.nih.gov/35081993/
• Blodgett, T. J., & Blodgett, N. P. (2021). Melatonin and melatonin-receptor agonists to prevent delirium in hospitalized older adults: An umbrella review.   https://pubmed.ncbi.nlm.nih.gov/34749057/

Comparative effectiveness 

• Systematic reviews of existing research on the effectiveness, comparative effectiveness, and comparative harms of different health care interventions.
•  Intended to provide relevant evidence to inform real-world health care decisions for patients, providers, and policymakers.
• “Methods Guide for Effectiveness and Comparative Effectiveness Reviews.” Methods Guide for Effectiveness and Comparative Effectiveness Reviews https://effectivehealthcare.ahrq.gov/products/collections/cer-methods-guide
• Main document of above guide :  https://effectivehealthcare.ahrq.gov/sites/default/files/pdf/cer-methods-guide_overview.pdf .
• Tanni KA, Truong CB, Johnson BS, Qian J. Comparative effectiveness and safety of eribulin in advanced or metastatic breast cancer: a systematic review and meta-analysis. Crit Rev Oncol Hematol. 2021 Jul;163:103375. doi: 10.1016/j.critrevonc.2021.103375. Epub 2021 Jun 2. PMID: 34087344.
• Rice D, Corace K, Wolfe D, Esmaeilisaraji L, Michaud A, Grima A, Austin B, Douma R, Barbeau P, Butler C, Willows M, Poulin PA, Sproule BA, Porath A, Garber G, Taha S, Garner G, Skidmore B, Moher D, Thavorn K, Hutton B. Evaluating comparative effectiveness of psychosocial interventions adjunctive to opioid agonist therapy for opioid use disorder: A systematic review with network meta-analyses. PLoS One. 2020 Dec 28;15(12):e0244401. doi: 10.1371/journal.pone.0244401. PMID: 33370393; PMCID: PMC7769275.

​ Scoping Review or Evidence Map

Systematically and transparently collect and  categorize  existing evidence on a broad question of  policy or management importance.

Seeks to identify research gaps and opportunities for evidence synthesis rather than searching for the effect of an intervention. 

May critically evaluate existing evidence, but does not attempt to synthesize the results in the way a systematic review would. (see  EE Journal  and  CIFOR )

May take longer than a systematic review.

• For useful guidance on whether to conduct a scoping review or not, see Figure 1 in this article. Pollock, D , Davies, EL , Peters, MDJ , et al. Undertaking a scoping review: A practical guide for nursing and midwifery students, clinicians, researchers, and academics . J Adv Nurs . 2021 ; 77 : 2102 – 2113 . https://doi.org/10.1111/jan.14743For a helpful

Hilary Arksey & Lisa O'Malley (2005) Scoping studies: towards a methodological framework http://10.1080/1364557032000119616

Aromataris E, Munn Z, eds. (2020) . JBI Manual for Evidence Synthesis.  JBI. Chapter 11: Scoping Reviews. https://wiki.jbi.global/display/MANUAL/Chapter+11%3A+Scoping+reviews

Munn Z, Peters MD, Stern C, Tet al. (2018)  Systematic review or scoping review? Guidance for authors when choosing between a systematic or scoping review approach. https://pubmed.ncbi.nlm.nih.gov/30453902/

Tricco AC, Lillie E, Zarin W, et al.. PRISMA Extension for Scoping Reviews (PRISMA-ScR): Checklist and Explanation. Ann Intern Med. 2018 Oct 2;169(7):467-473. doi: 10.7326/M18-0850. Epub 2018 Sep 4. PMID: 30178033.  https://www.acpjournals.org/doi/epdf/10.7326/M18-0850

Bouldin E, Patel SR, Tey CS, et al. Bullying and Children who are Deaf or Hard-of-hearing: A Scoping Review. https://pubmed.ncbi.nlm.nih.gov/33438758

Finn M, Gilmore B, Sheaf G, Vallières F. What do we mean by individual capacity strengthening for primary health care in low- and middle-income countries? A systematic scoping review to improve conceptual clarity. https://pubmed.ncbi.nlm.nih.gov/33407554/

Hirt J, Nordhausen T, Meichlinger J, Braun V, Zeller A, Meyer G. Educational interventions to improve literature searching skills in the health sciences: a scoping review.  https://pubmed.ncbi.nlm.nih.gov/33013210/

​ Rapid Review

Useful for addressing issues needing timely decisions, such as developing policy recommendations. 

Applies systematic review methodology within a time-constrained setting.

Employs intentional, methodological "shortcuts" (limiting search terms for example) at the risk of introducing bias.

Defining characteristic is the transparency of team methodological choices.

Garritty, Chantelle, Gerald Gartlehner, Barbara Nussbaumer-Streit, Valerie J. King, Candyce Hamel, Chris Kamel, Lisa Affengruber, and Adrienne Stevens. “Cochrane Rapid Reviews Methods Group Offers Evidence-Informed Guidance to Conduct Rapid Reviews.” Journal of Clinical Epidemiology 130 (February 2021): 13–22. https://doi.org/10.1016/j.jclinepi.2020.10.007 .

Klerings I , Robalino S , Booth A , et al. Rapid reviews methods series: Guidance on literature search. BMJ Evidence-Based Medicine. 19 April 2023. https:// 10.1136/bmjebm-2022-112079

WHO. “WHO | Rapid Reviews to Strengthen Health Policy and Systems: A Practical Guide.” World Health Organization. Accessed February 11, 2022. https://iris.who.int/handle/10665/258698 .

Dobbins, Maureen. “Steps for Conducting a Rapid Review,” 2017, 25.  https://www.nccmt.ca/uploads/media/media/0001/01/a816af720e4d587e13da6bb307df8c907a5dff9a.pdf

Norris HC, Richardson HM, Benoit MC, et al. (2021) Utilization Impact of Cost-Sharing Elimination for Preventive Care Services: A Rapid Review.   https://pubmed.ncbi.nlm.nih.gov/34157906/

Marcus N, Stergiopoulos V. Re-examining mental health crisis intervention: A rapid review comparing outcomes across police, co-responder and non-police models. Health Soc Care Community. 2022 Feb 1. doi: 10.1111/hsc.13731. Epub ahead of print. PMID: 35103364.

Narrative ( Literature ) Review

A broad term referring to reviews with a wide scope and non-standardized methodology.

See Baethge 2019 below for a method to provide quality assessment,

Search strategies, comprehensiveness, and time range covered will vary and do not follow an established protocol.

It provides insight into a particular topic by critically examining sources, generally over a particular period of time.

Greenhalgh, T., Thorne, S., & Malterud, K. (2018). Time to challenge the spurious hierarchy of systematic over narrative reviews?. https://pubmed.ncbi.nlm.nih.gov/29578574/

• Baethge, C., Goldbeck-Wood, S. & Mertens, S. (2019). SANRA—a scale for the quality assessment of narrative review articles. https://doi.org/10.1186/ s41073-019-0064-8   https:// researchintegrityjournal. biomedcentral.com/articles/10. 1186/s41073-019-0064-8
• Czypionka, T., Greenhalgh, T., Bassler, D., & Bryant, M. B. (2021). Masks and Face Coverings for the Lay Public : A Narrative Update. https://pubmed.ncbi.nlm.nih.gov/33370173/
• Gardiner, F. W., Nwose, E. U., Bwititi, P. T., et al.. (2017). Services aimed at achieving desirable clinical outcomes in patients with chronic kidney disease and diabetes mellitus: A narrative review. https://pubmed.ncbi.nlm.nih.gov/29201367/
•  Dickerson, S. S., Connors, L. M., Fayad, A., & Dean, G. E. (2014). Sleep-wake disturbances in cancer patients: narrative review of literature focusing on improving quality of life outcomes.  https://pubmed.ncbi.nlm.nih.gov/25050080/

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How to write a review article?

In the medical sciences, the importance of review articles is rising. When clinicians want to update their knowledge and generate guidelines about a topic, they frequently use reviews as a starting point. The value of a review is associated with what has been done, what has been found and how these findings are presented. Before asking ‘how,’ the question of ‘why’ is more important when starting to write a review. The main and fundamental purpose of writing a review is to create a readable synthesis of the best resources available in the literature for an important research question or a current area of research. Although the idea of writing a review is attractive, it is important to spend time identifying the important questions. Good review methods are critical because they provide an unbiased point of view for the reader regarding the current literature. There is a consensus that a review should be written in a systematic fashion, a notion that is usually followed. In a systematic review with a focused question, the research methods must be clearly described. A ‘methodological filter’ is the best method for identifying the best working style for a research question, and this method reduces the workload when surveying the literature. An essential part of the review process is differentiating good research from bad and leaning on the results of the better studies. The ideal way to synthesize studies is to perform a meta-analysis. In conclusion, when writing a review, it is best to clearly focus on fixed ideas, to use a procedural and critical approach to the literature and to express your findings in an attractive way.

The importance of review articles in health sciences is increasing day by day. Clinicians frequently benefit from review articles to update their knowledge in their field of specialization, and use these articles as a starting point for formulating guidelines. [ 1 , 2 ] The institutions which provide financial support for further investigations resort to these reviews to reveal the need for these researches. [ 3 ] As is the case with all other researches, the value of a review article is related to what is achieved, what is found, and the way of communicating this information. A few studies have evaluated the quality of review articles. Murlow evaluated 50 review articles published in 1985, and 1986, and revealed that none of them had complied with clear-cut scientific criteria. [ 4 ] In 1996 an international group that analyzed articles, demonstrated the aspects of review articles, and meta-analyses that had not complied with scientific criteria, and elaborated QUOROM (QUality Of Reporting Of Meta-analyses) statement which focused on meta-analyses of randomized controlled studies. [ 5 ] Later on this guideline was updated, and named as PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses). [ 6 ]

Review articles are divided into 2 categories as narrative, and systematic reviews. Narrative reviews are written in an easily readable format, and allow consideration of the subject matter within a large spectrum. However in a systematic review, a very detailed, and comprehensive literature surveying is performed on the selected topic. [ 7 , 8 ] Since it is a result of a more detailed literature surveying with relatively lesser involvement of author’s bias, systematic reviews are considered as gold standard articles. Systematic reviews can be diivded into qualitative, and quantitative reviews. In both of them detailed literature surveying is performed. However in quantitative reviews, study data are collected, and statistically evaluated (ie. meta-analysis). [ 8 ]

Before inquring for the method of preparation of a review article, it is more logical to investigate the motivation behind writing the review article in question. The fundamental rationale of writing a review article is to make a readable synthesis of the best literature sources on an important research inquiry or a topic. This simple definition of a review article contains the following key elements:

• The question(s) to be dealt with
• Methods used to find out, and select the best quality researches so as to respond to these questions.
• To synthetize available, but quite different researches

For the specification of important questions to be answered, number of literature references to be consulted should be more or less determined. Discussions should be conducted with colleagues in the same area of interest, and time should be reserved for the solution of the problem(s). Though starting to write the review article promptly seems to be very alluring, the time you spend for the determination of important issues won’t be a waste of time. [ 9 ]

The PRISMA statement [ 6 ] elaborated to write a well-designed review articles contains a 27-item checklist ( Table 1 ). It will be reasonable to fulfill the requirements of these items during preparation of a review article or a meta-analysis. Thus preparation of a comprehensible article with a high-quality scientific content can be feasible.

PRISMA statement: A 27-item checklist

Contents and format

Important differences exist between systematic, and non-systematic reviews which especially arise from methodologies used in the description of the literature sources. A non-systematic review means use of articles collected for years with the recommendations of your colleagues, while systematic review is based on struggles to search for, and find the best possible researches which will respond to the questions predetermined at the start of the review.

Though a consensus has been reached about the systematic design of the review articles, studies revealed that most of them had not been written in a systematic format. McAlister et al. analyzed review articles in 6 medical journals, and disclosed that in less than one fourth of the review articles, methods of description, evaluation or synthesis of evidence had been provided, one third of them had focused on a clinical topic, and only half of them had provided quantitative data about the extend of the potential benefits. [ 10 ]

Use of proper methodologies in review articles is important in that readers assume an objective attitude towards updated information. We can confront two problems while we are using data from researches in order to answer certain questions. Firstly, we can be prejudiced during selection of research articles or these articles might be biased. To minimize this risk, methodologies used in our reviews should allow us to define, and use researches with minimal degree of bias. The second problem is that, most of the researches have been performed with small sample sizes. In statistical methods in meta-analyses, available researches are combined to increase the statistical power of the study. The problematic aspect of a non-systematic review is that our tendency to give biased responses to the questions, in other words we apt to select the studies with known or favourite results, rather than the best quality investigations among them.

As is the case with many research articles, general format of a systematic review on a single subject includes sections of Introduction, Methods, Results, and Discussion ( Table 2 ).

Structure of a systematic review

Preparation of the review article

Steps, and targets of constructing a good review article are listed in Table 3 . To write a good review article the items in Table 3 should be implemented step by step. [ 11 – 13 ]

Steps of a systematic review

The research question

It might be helpful to divide the research question into components. The most prevalently used format for questions related to the treatment is PICO (P - Patient, Problem or Population; I-Intervention; C-appropriate Comparisons, and O-Outcome measures) procedure. For example In female patients (P) with stress urinary incontinence, comparisons (C) between transobturator, and retropubic midurethral tension-free band surgery (I) as for patients’ satisfaction (O).

Finding Studies

In a systematic review on a focused question, methods of investigation used should be clearly specified.

Ideally, research methods, investigated databases, and key words should be described in the final report. Different databases are used dependent on the topic analyzed. In most of the clinical topics, Medline should be surveyed. However searching through Embase and CINAHL can be also appropriate.

While determining appropriate terms for surveying, PICO elements of the issue to be sought may guide the process. Since in general we are interested in more than one outcome, P, and I can be key elements. In this case we should think about synonyms of P, and I elements, and combine them with a conjunction AND.

One method which might alleviate the workload of surveying process is “methodological filter” which aims to find the best investigation method for each research question. A good example of this method can be found in PubMed interface of Medline. The Clinical Queries tool offers empirically developed filters for five different inquiries as guidelines for etiology, diagnosis, treatment, prognosis or clinical prediction.

Evaluation of the Quality of the Study

As an indispensable component of the review process is to discriminate good, and bad quality researches from each other, and the outcomes should be based on better qualified researches, as far as possible. To achieve this goal you should know the best possible evidence for each type of question The first component of the quality is its general planning/design of the study. General planning/design of a cohort study, a case series or normal study demonstrates variations.

A hierarchy of evidence for different research questions is presented in Table 4 . However this hierarchy is only a first step. After you find good quality research articles, you won’t need to read all the rest of other articles which saves you tons of time. [ 14 ]

Determination of levels of evidence based on the type of the research question

Formulating a Synthesis

Rarely all researches arrive at the same conclusion. In this case a solution should be found. However it is risky to make a decision based on the votes of absolute majority. Indeed, a well-performed large scale study, and a weakly designed one are weighed on the same scale. Therefore, ideally a meta-analysis should be performed to solve apparent differences. Ideally, first of all, one should be focused on the largest, and higher quality study, then other studies should be compared with this basic study.

Conclusions

In conclusion, during writing process of a review article, the procedures to be achieved can be indicated as follows: 1) Get rid of fixed ideas, and obsessions from your head, and view the subject from a large perspective. 2) Research articles in the literature should be approached with a methodological, and critical attitude and 3) finally data should be explained in an attractive way.

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Types of Literature Review — A Guide for Researchers

Table of Contents

Researchers often face challenges when choosing the appropriate type of literature review for their study. Regardless of the type of research design and the topic of a research problem , they encounter numerous queries, including:

What is the right type of literature review my study demands?

• How do we gather the data?
• How to conduct one?
• How reliable are the review findings?
• How do we employ them in our research? And the list goes on.

If you’re also dealing with such a hefty questionnaire, this article is of help. Read through this piece of guide to get an exhaustive understanding of the different types of literature reviews and their step-by-step methodologies along with a dash of pros and cons discussed.

Heading from scratch!

What is a Literature Review?

A literature review provides a comprehensive overview of existing knowledge on a particular topic, which is quintessential to any research project. Researchers employ various literature reviews based on their research goals and methodologies. The review process involves assembling, critically evaluating, and synthesizing existing scientific publications relevant to the research question at hand. It serves multiple purposes, including identifying gaps in existing literature, providing theoretical background, and supporting the rationale for a research study.

What is the importance of a Literature review in research?

Literature review in research serves several key purposes, including:

• Background of the study: Provides proper context for the research. It helps researchers understand the historical development, theoretical perspectives, and key debates related to their research topic.
• Identification of research gaps: By reviewing existing literature, researchers can identify gaps or inconsistencies in knowledge, paving the way for new research questions and hypotheses relevant to their study.
• Theoretical framework development: Facilitates the development of theoretical frameworks by cultivating diverse perspectives and empirical findings. It helps researchers refine their conceptualizations and theoretical models.
• Methodological guidance: Offers methodological guidance by highlighting the documented research methods and techniques used in previous studies. It assists researchers in selecting appropriate research designs, data collection methods, and analytical tools.
• Quality assurance and upholding academic integrity: Conducting a thorough literature review demonstrates the rigor and scholarly integrity of the research. It ensures that researchers are aware of relevant studies and can accurately attribute ideas and findings to their original sources.

Types of Literature Review

Literature review plays a crucial role in guiding the research process , from providing the background of the study to research dissemination and contributing to the synthesis of the latest theoretical literature review findings in academia.

However, not all types of literature reviews are the same; they vary in terms of methodology, approach, and purpose. Let's have a look at the various types of literature reviews to gain a deeper understanding of their applications.

1. Narrative Literature Review

A narrative literature review, also known as a traditional literature review, involves analyzing and summarizing existing literature without adhering to a structured methodology. It typically provides a descriptive overview of key concepts, theories, and relevant findings of the research topic.

Unlike other types of literature reviews, narrative reviews reinforce a more traditional approach, emphasizing the interpretation and discussion of the research findings rather than strict adherence to methodological review criteria. It helps researchers explore diverse perspectives and insights based on the research topic and acts as preliminary work for further investigation.

Steps to Conduct a Narrative Literature Review

Source:- https://www.researchgate.net/figure/Steps-of-writing-a-narrative-review_fig1_354466408

Define the research question or topic:

The first step in conducting a narrative literature review is to clearly define the research question or topic of interest. Defining the scope and purpose of the review includes — What specific aspect of the topic do you want to explore? What are the main objectives of the research? Refine your research question based on the specific area you want to explore.

Conduct a thorough literature search

Once the research question is defined, you can conduct a comprehensive literature search. Explore and use relevant databases and search engines like SciSpace Discover to identify credible and pertinent, scholarly articles and publications.

Select relevant studies

Before choosing the right set of studies, it’s vital to determine inclusion (studies that should possess the required factors) and exclusion criteria for the literature and then carefully select papers. For example — Which studies or sources will be included based on relevance, quality, and publication date?

*Important (applies to all the reviews): Inclusion criteria are the factors a study must include (For example: Include only peer-reviewed articles published between 2022-2023, etc.). Exclusion criteria are the factors that wouldn’t be required for your search strategy (Example: exclude irrelevant papers, preprints, written in non-English, etc.)

Critically analyze the literature

Once the relevant studies are shortlisted, evaluate the methodology, findings, and limitations of each source and jot down key themes, patterns, and contradictions. You can use efficient AI tools to conduct a thorough literature review and analyze all the required information.

Synthesize and integrate the findings

Now, you can weave together the reviewed studies, underscoring significant findings such that new frameworks, contrasting viewpoints, and identifying knowledge gaps.

Discussion and conclusion

This is an important step before crafting a narrative review — summarize the main findings of the review and discuss their implications in the relevant field. For example — What are the practical implications for practitioners? What are the directions for future research for them?

Write a cohesive narrative review

Organize the review into coherent sections and structure your review logically, guiding the reader through the research landscape and offering valuable insights. Use clear and concise language to convey key points effectively.

Structure of Narrative Literature Review

A well-structured, narrative analysis or literature review typically includes the following components:

• Introduction: Provides an overview of the topic, objectives of the study, and rationale for the review.
• Background: Highlights relevant background information and establish the context for the review.
• Main Body: Indexes the literature into thematic sections or categories, discussing key findings, methodologies, and theoretical frameworks.
• Discussion: Analyze and synthesize the findings of the reviewed studies, stressing similarities, differences, and any gaps in the literature.
• Conclusion: Summarizes the main findings of the review, identifies implications for future research, and offers concluding remarks.

Pros and Cons of Narrative Literature Review

• Flexibility in methodology and doesn’t necessarily rely on structured methodologies
• Follows traditional approach and provides valuable and contextualized insights
• Suitable for exploring complex or interdisciplinary topics. For example — Climate change and human health, Cybersecurity and privacy in the digital age, and more
• Subjectivity in data selection and interpretation
• Potential for bias in the review process
• Lack of rigor compared to systematic reviews

Example of Well-Executed Narrative Literature Reviews

Paper title:  Examining Moral Injury in Clinical Practice: A Narrative Literature Review

Source: SciSpace

You can also chat with the papers using SciSpace ChatPDF to get a thorough understanding of the research papers.

While narrative reviews offer flexibility, academic integrity remains paramount. So, ensure proper citation of all sources and maintain a transparent and factual approach throughout your critical narrative review, itself.

2. Systematic Review

A systematic literature review is one of the comprehensive types of literature review that follows a structured approach to assembling, analyzing, and synthesizing existing research relevant to a particular topic or question. It involves clearly defined criteria for exploring and choosing studies, as well as rigorous methods for evaluating the quality of relevant studies.

It plays a prominent role in evidence-based practice and decision-making across various domains, including healthcare, social sciences, education, health sciences, and more. By systematically investigating available literature, researchers can identify gaps in knowledge, evaluate the strength of evidence, and report future research directions.

Steps to Conduct Systematic Reviews

Source:- https://www.researchgate.net/figure/Steps-of-Systematic-Literature-Review_fig1_321422320

Here are the key steps involved in conducting a systematic literature review

Formulate a clear and focused research question

Clearly define the research question or objective of the review. It helps to centralize the literature search strategy and determine inclusion criteria for relevant studies.

Develop a thorough literature search strategy

Design a comprehensive search strategy to identify relevant studies. It involves scrutinizing scientific databases and all relevant articles in journals. Plus, seek suggestions from domain experts and review reference lists of relevant review articles.

Screening and selecting studies

Employ predefined inclusion and exclusion criteria to systematically screen the identified studies. This screening process also typically involves multiple reviewers independently assessing the eligibility of each study.

Data extraction

Extract key information from selected studies using standardized forms or protocols. It includes study characteristics, methods, results, and conclusions.

Critical appraisal

Evaluate the methodological quality and potential biases of included studies. Various tools (BMC medical research methodology) and criteria can be implemented for critical evaluation depending on the study design and research quetions .

Data synthesis

Analyze and synthesize review findings from individual studies to draw encompassing conclusions or identify overarching patterns and explore heterogeneity among studies.

Interpretation and conclusion

Interpret the findings about the research question, considering the strengths and limitations of the research evidence. Draw conclusions and implications for further research.

The final step — Report writing

Craft a detailed report of the systematic literature review adhering to the established guidelines of PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses). This ensures transparency and reproducibility of the review process.

By following these steps, a systematic literature review aims to provide a comprehensive and unbiased summary of existing evidence, help make informed decisions, and advance knowledge in the respective domain or field.

Structure of a systematic literature review

A well-structured systematic literature review typically consists of the following sections:

• Introduction: Provides background information on the research topic, outlines the review objectives, and enunciates the scope of the study.
• Methodology: Describes the literature search strategy, selection criteria, data extraction process, and other methods used for data synthesis, extraction, or other data analysis..
• Results: Presents the review findings, including a summary of the incorporated studies and their key findings.
• Discussion: Interprets the findings in light of the review objectives, discusses their implications, and identifies limitations or promising areas for future research.
• Conclusion: Summarizes the main review findings and provides suggestions based on the evidence presented in depth meta analysis.

*Important (applies to all the reviews): Remember, the specific structure of your literature review may vary depending on your topic, research question, and intended audience. However, adhering to a clear and logical hierarchy ensures your review effectively analyses and synthesizes knowledge and contributes valuable insights for readers.

Pros and Cons of Systematic Literature Review

• Adopts rigorous and transparent methodology
• Minimizes bias and enhances the reliability of the study
• Provides evidence-based insights
• Time and resource-intensive
• High dependency on the quality of available literature (literature research strategy should be accurate)
• Potential for publication bias

Example of Well-Executed Systematic Literature Review

Paper title: Systematic Reviews: Understanding the Best Evidence For Clinical Decision-making in Health Care: Pros and Cons.

Read this detailed article on how to use AI tools to conduct a systematic review for your research!

3. Scoping Literature Review

A scoping literature review is a methodological review type of literature review that adopts an iterative approach to systematically map the existing literature on a particular topic or research area. It involves identifying, selecting, and synthesizing relevant papers to provide an overview of the size and scope of available evidence. Scoping reviews are broader in scope and include a diverse range of study designs and methodologies especially focused on health services research.

The main purpose of a scoping literature review is to examine the extent, range, and nature of existing studies on a topic, thereby identifying gaps in research, inconsistencies, and areas for further investigation. Additionally, scoping reviews can help researchers identify suitable methodologies and formulate clinical recommendations. They also act as the frameworks for future systematic reviews or primary research studies.

Scoping reviews are primarily focused on —

• Emerging or evolving topics — where the research landscape is still growing or budding. Example — Whole Systems Approaches to Diet and Healthy Weight: A Scoping Review of Reviews .
• Broad and complex topics : With a vast amount of existing literature.
• Scenarios where a systematic review is not feasible: Due to limited resources or time constraints.

Steps to Conduct a Scoping Literature Review

While Scoping reviews are not as rigorous as systematic reviews, however, they still follow a structured approach. Here are the steps:

Identify the research question: Define the broad topic you want to explore.

Identify Relevant Studies: Conduct a comprehensive search of relevant literature using appropriate databases, keywords, and search strategies.

Select studies to be included in the review: Based on the inclusion and exclusion criteria, determine the appropriate studies to be included in the review.

Data extraction and charting : Extract relevant information from selected studies, such as year, author, main results, study characteristics, key findings, and methodological approaches.  However, it varies depending on the research question.

Collate, summarize, and report the results: Analyze and summarize the extracted data to identify key themes and trends. Then, present the findings of the scoping review in a clear and structured manner, following established guidelines and frameworks .

Structure of a Scoping Literature Review

A scoping literature review typically follows a structured format similar to a systematic review. It includes the following sections:

• Introduction: Introduce the research topic and objectives of the review, providing the historical context, and rationale for the study.
• Methods : Describe the methods used to conduct the review, including search strategies, study selection criteria, and data extraction procedures.
• Results: Present the findings of the review, including key themes, concepts, and patterns identified in the literature review.
• Discussion: Examine the implications of the findings, including strengths, limitations, and areas for further examination.
• Conclusion: Recapitulate the main findings of the review and their implications for future research, policy, or practice.

Pros and Cons of Scoping Literature Review

• Provides a comprehensive overview of existing literature
• Helps to identify gaps and areas for further research
• Suitable for exploring broad or complex research questions
• Doesn’t provide the depth of analysis offered by systematic reviews
• Subject to researcher bias in study selection and data extraction
• Requires careful consideration of literature search strategies and inclusion criteria to ensure comprehensiveness and validity.

In short, a scoping review helps map the literature on developing or emerging topics and identifying gaps. It might be considered as a step before conducting another type of review, such as a systematic review. Basically, acts as a precursor for other literature reviews.

Example of a Well-Executed Scoping Literature Review

Paper title: Health Chatbots in Africa Literature: A Scoping Review

Check out the key differences between Systematic and Scoping reviews — Evaluating literature review: systematic vs. scoping reviews

4. Integrative Literature Review

Integrative Literature Review (ILR) is a type of literature review that proposes a distinctive way to analyze and synthesize existing literature on a specific topic, providing a thorough understanding of research and identifying potential gaps for future research.

Unlike a systematic review, which emphasizes quantitative studies and follows strict inclusion criteria, an ILR embraces a more pliable approach. It works beyond simply summarizing findings — it critically analyzes, integrates, and interprets research from various methodologies (qualitative, quantitative, mixed methods) to provide a deeper understanding of the research landscape. ILRs provide a holistic and systematic overview of existing research, integrating findings from various methodologies. ILRs are ideal for exploring intricate research issues, examining manifold perspectives, and developing new research questions.

Steps to Conduct an Integrative Literature Review

• Identify the research question: Clearly define the research question or topic of interest as formulating a clear and focused research question is critical to leading the entire review process.
• Literature search strategy: Employ systematic search techniques to locate relevant literature across various databases and sources.
• Evaluate the quality of the included studies : Critically assess the methodology, rigor, and validity of each study by applying inclusion and exclusion criteria to filter and select studies aligned with the research objectives.
• Data Extraction: Extract relevant data from selected studies using a structured approach.
• Synthesize the findings : Thoroughly analyze the selected literature, identify key themes, and synthesize findings to derive noteworthy insights.
• Critical appraisal: Critically evaluate the quality and validity of qualitative research and included studies by using BMC medical research methodology.
• Interpret and present your findings: Discuss the purpose and implications of your analysis, spotlighting key insights and limitations. Organize and present the findings coherently and systematically.

Structure of an Integrative Literature Review

• Introduction : Provide an overview of the research topic and the purpose of the integrative review.
• Methods: Describe the opted literature search strategy, selection criteria, and data extraction process.
• Results: Present the synthesized findings, including key themes, patterns, and contradictions.
• Discussion: Interpret the findings about the research question, emphasizing implications for theory, practice, and prospective research.
• Conclusion: Summarize the main findings, limitations, and contributions of the integrative review.

Pros and Cons of Integrative Literature Review

• Informs evidence-based practice and policy to the relevant stakeholders of the research.
• Contributes to theory development and methodological advancement, especially in the healthcare arena.
• Integrates diverse perspectives and findings
• Time-consuming process due to the extensive literature search and synthesis
• Requires advanced analytical and critical thinking skills
• Potential for bias in study selection and interpretation
• The quality of included studies may vary, affecting the validity of the review

Example of Integrative Literature Reviews

Paper Title: An Integrative Literature Review: The Dual Impact of Technological Tools on Health and Technostress Among Older Workers

5. Rapid Literature Review

A Rapid Literature Review (RLR) is the fastest type of literature review which makes use of a streamlined approach for synthesizing literature summaries, offering a quicker and more focused alternative to traditional systematic reviews. Despite employing identical research methods, it often simplifies or omits specific steps to expedite the process. It allows researchers to gain valuable insights into current research trends and identify key findings within a shorter timeframe, often ranging from a few days to a few weeks — unlike traditional literature reviews, which may take months or even years to complete.

When to Consider a Rapid Literature Review?

• When time impediments demand a swift summary of existing research
• For emerging topics where the latest literature requires quick evaluation
• To report pilot studies or preliminary research before embarking on a comprehensive systematic review

Steps to Conduct a Rapid Literature Review

• Define the research question or topic of interest. A well-defined question guides the search process and helps researchers focus on relevant studies.
• Determine key databases and sources of relevant literature to ensure comprehensive coverage.
• Develop literature search strategies using appropriate keywords and filters to fetch a pool of potential scientific articles.
• Screen search results based on predefined inclusion and exclusion criteria.
• Extract and summarize relevant information from the above-preferred studies.
• Synthesize findings to identify key themes, patterns, or gaps in the literature.
• Prepare a concise report or a summary of the RLR findings.

Structure of a Rapid Literature Review

An effective structure of an RLR typically includes the following sections:

• Introduction: Briefly introduce the research topic and objectives of the RLR.
• Methodology: Describe the search strategy, inclusion and exclusion criteria, and data extraction process.
• Results: Present a summary of the findings, including key themes or patterns identified.
• Discussion: Interpret the findings, discuss implications, and highlight any limitations or areas for further research
• Conclusion: Summarize the key findings and their implications for practice or future research

Pros and Cons of Rapid Literature Review

• RLRs can be completed quickly, authorizing timely decision-making
• RLRs are a cost-effective approach since they require fewer resources compared to traditional literature reviews
• Offers great accessibility as RLRs provide prompt access to synthesized evidence for stakeholders
• RLRs are flexible as they can be easily adapted for various research contexts and objectives
• RLR reports are limited and restricted, not as in-depth as systematic reviews, and do not provide comprehensive coverage of the literature compared to traditional reviews.
• Susceptible to bias because of the expedited nature of RLRs. It would increase the chance of overlooking relevant studies or biases in the selection process.
• Due to time constraints, RLR findings might not be robust enough as compared to systematic reviews.

Example of a Well-Executed Rapid Literature Review

Paper Title: What Is the Impact of ChatGPT on Education? A Rapid Review of the Literature

A Summary of Literature Review Types

Tools and Resources for Conducting Different Types of Literature Reviews

Online scientific databases.

Platforms such as SciSpace , PubMed , Scopus , Elsevier , and Web of Science provide access to a vast array of scholarly literature, facilitating the search and data retrieval process.

Reference management software

Tools like SciSpace Citation Generator , EndNote, Zotero , and Mendeley assist researchers in organizing, annotating, and citing relevant literature, streamlining the review process altogether.

Automate Literature Review with AI tools

Automate the literature review process by using tools like SciSpace literature review which helps you compare and contrast multiple papers all on one screen in an easy-to-read matrix format. You can effortlessly analyze and interpret the review findings tailored to your study. It also supports the review in 75+ languages, making it more manageable even for non-English speakers.

Goes without saying — literature review plays a pivotal role in academic research to identify the current trends and provide insights to pave the way for future research endeavors. Different types of literature review has their own strengths and limitations, making them suitable for different research designs and contexts. Whether conducting a narrative review, systematic review, scoping review, integrative review, or rapid literature review, researchers must cautiously consider the objectives, resources, and the nature of the research topic.

If you’re currently working on a literature review and still adopting a manual and traditional approach, switch to the automated AI literature review workspace and transform your traditional literature review into a rapid one by extracting all the latest and relevant data for your research!

There you go!

Frequently Asked Questions

Narrative reviews give a general overview of a topic based on the author's knowledge. They may lack clear criteria and can be biased. On the other hand, systematic reviews aim to answer specific research questions by following strict methods. They're thorough but time-consuming.

A systematic review collects and analyzes existing research to provide an overview of a topic, while a meta-analysis statistically combines data from multiple studies to draw conclusions about the overall effect of an intervention or relationship between variables.

A systematic review thoroughly analyzes existing research on a specific topic using strict methods. In contrast, a scoping review offers a broader overview of the literature without evaluating individual studies in depth.

A systematic review thoroughly examines existing research using a rigorous process, while a rapid review provides a quicker summary of evidence, often by simplifying some of the systematic review steps to meet shorter timelines.

A systematic review carefully examines many studies on a single topic using specific guidelines. Conversely, an integrative review blends various types of research to provide a more comprehensive understanding of the topic.

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What is a review article?

Learn how to write a review article.

What is a review article? A review article can also be called a literature review, or a review of literature. It is a survey of previously published research on a topic. It should give an overview of current thinking on the topic. And, unlike an original research article, it will not present new experimental results.

Writing a review of literature is to provide a critical evaluation of the data available from existing studies. Review articles can identify potential research areas to explore next, and sometimes they will draw new conclusions from the existing data.

Why write a review article?

To provide a comprehensive foundation on a topic.

To explain the current state of knowledge.

To identify gaps in existing studies for potential future research.

To highlight the main methodologies and research techniques.

Did you know? 

There are some journals that only publish review articles, and others that do not accept them.

Make sure you check the  aims and scope  of the journal you’d like to publish in to find out if it’s the right place for your review article.

How to write a review article

Below are 8 key items to consider when you begin writing your review article.

Check the journal’s aims and scope

Make sure you have read the aims and scope for the journal you are submitting to and follow them closely. Different journals accept different types of articles and not all will accept review articles, so it’s important to check this before you start writing.

Define your scope

Define the scope of your review article and the research question you’ll be answering, making sure your article contributes something new to the field. 

As award-winning author Angus Crake told us, you’ll also need to “define the scope of your review so that it is manageable, not too large or small; it may be necessary to focus on recent advances if the field is well established.” 

Finding sources to evaluate

When finding sources to evaluate, Angus Crake says it’s critical that you “use multiple search engines/databases so you don’t miss any important ones.” 

For finding studies for a systematic review in medical sciences,  read advice from NCBI . 

Writing your title, abstract and keywords

Spend time writing an effective title, abstract and keywords. This will help maximize the visibility of your article online, making sure the right readers find your research. Your title and abstract should be clear, concise, accurate, and informative. 

For more information and guidance on getting these right, read our guide to writing a good abstract and title  and our  researcher’s guide to search engine optimization . 

Introduce the topic

Does a literature review need an introduction? Yes, always start with an overview of the topic and give some context, explaining why a review of the topic is necessary. Gather research to inform your introduction and make it broad enough to reach out to a large audience of non-specialists. This will help maximize its wider relevance and impact. 

Don’t make your introduction too long. Divide the review into sections of a suitable length to allow key points to be identified more easily.

Include critical discussion

Make sure you present a critical discussion, not just a descriptive summary of the topic. If there is contradictory research in your area of focus, make sure to include an element of debate and present both sides of the argument. You can also use your review paper to resolve conflict between contradictory studies.

What researchers say

Angus Crake, researcher

As part of your conclusion, include making suggestions for future research on the topic. Focus on the goal to communicate what you understood and what unknowns still remains.

Use a critical friend

Always perform a final spell and grammar check of your article before submission. 

You may want to ask a critical friend or colleague to give their feedback before you submit. If English is not your first language, think about using a language-polishing service.

Find out more about how  Taylor & Francis Editing Services can help improve your manuscript before you submit.

What is the difference between a research article and a review article?

Before you submit your review article…

Complete this checklist before you submit your review article:

Have you checked the journal’s aims and scope?

Have you defined the scope of your article?

Did you use multiple search engines to find sources to evaluate?

Have you written a descriptive title and abstract using keywords?

Did you start with an overview of the topic?

Have you presented a critical discussion?

Have you included future suggestions for research in your conclusion?

Have you asked a friend to do a final spell and grammar check?

Expert help for your manuscript

Taylor & Francis Editing Services  offers a full range of pre-submission manuscript preparation services to help you improve the quality of your manuscript and submit with confidence.

Related resources

How to edit your paper

Writing a scientific literature review

Types of Reviews

In this guide.

• Common Types of Reviews
• Narrative Reviews
• Scoping Reviews
• Systematic Reviews
• Rapid Reviews
• Umbrella Reviews

Clinical Practice Guidelines

• Full Infographic Series

PDF Version of Infographic

• Six Common Types of Reviews Infographic Download a PDF copy of the full infographic including an overview of six common types of reviews and a breakdown of each review type.

Narrative Review

• AKA Literature Reviews
• Looks at literature across a specific topic
• Synthesizes what you have learned
• Can involve one specific database, or across multiple databases

Don't need to be a subject expert, but should have a pretty good concept of the topic once completed

Scoping Review

• Knowledge synthesis that follows a systematic approach
• Maps evidence on a topic
• Identifies main concepts, theories, sources, and knowledge gaps

Systematic Review

• Uses explicit methods to collect all evidence that fits pre-specified eligibility criteria
• Answers a specific research question
• Methodology aims to reduce bias
• Meta-analysis may be used to combine the data from appropriate systematic reviews

Rapid Review

• Knowledge synthesis that accelerates the process of conducting a traditional systematic review
• Streamlines or omits specific steps to produce evidence for stakeholders in a resource-efficient manner

Umbrella Review

• Review of reviews
• Synthesizes evidence from other published systematic reviews and/or meta-analyses on a broad topic
• Includes recommendations intended to optimize patient care
• Often informed by multiple systematic reviews aimed at each point made in a CPG
• Assesses the benefits and harms of alternative care options

Does your research request not fit into these categories?

Lane Medical Librarians are still able to help! We can also help with book chapters, theses, background literature reviews, etc. Submit a request through our Literature Search Service to get started.

A complete list of references for this infographic series is available.

• Next: Narrative Reviews >>
• Last Updated: Oct 4, 2023 4:22 PM
• URL: https://laneguides.stanford.edu/types-of-reviews

How to Write a Review Article

• Types of Review Articles
• Before Writing a Review Article
• Determining Where to Publish
• Searching the Literature
• Citation Management
• Reading a Review Article

Descriptions of Types of Reviews

Reproduced from: Grant MJ, Booth A. A typology of reviews: an analysis of 14 review types and associated methodologies .  Health Info Libr J . 2009 Jun;26(2):91-108. doi: 10.1111/j.1471-1842.2009.00848.x. Review. PubMed PMID: 19490148.

Further Reading

Sutton A, Clowes M, Preston L, Booth A. Meeting the review family: exploring review types and associated information retrieval requirements . Health Info Libr J. 2019;36(3):202-222. doi: 10.1111/hir.12276.

• << Previous: What is a Review Article?
• Next: Before Writing a Review Article >>
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Writing a good review article

• 3 minute read
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Table of Contents

As a young researcher, you might wonder how to start writing your first review article, and the extent of the information that it should contain. A review article is a comprehensive summary of the current understanding of a specific research topic and is based on previously published research. Unlike research papers, it does not contain new results, but can propose new inferences based on the combined findings of previous research.

Types of review articles

Review articles are typically of three types: literature reviews, systematic reviews, and meta-analyses.

A literature review is a general survey of the research topic and aims to provide a reliable and unbiased account of the current understanding of the topic.

A systematic review , in contrast, is more specific and attempts to address a highly focused research question. Its presentation is more detailed, with information on the search strategy used, the eligibility criteria for inclusion of studies, the methods utilized to review the collected information, and more.

A meta-analysis is similar to a systematic review in that both are systematically conducted with a properly defined research question. However, unlike the latter, a meta-analysis compares and evaluates a defined number of similar studies. It is quantitative in nature and can help assess contrasting study findings.

Tips for writing a good review article

Here are a few practices that can make the time-consuming process of writing a review article easier:

• Define your question: Take your time to identify the research question and carefully articulate the topic of your review paper. A good review should also add something new to the field in terms of a hypothesis, inference, or conclusion. A carefully defined scientific question will give you more clarity in determining the novelty of your inferences.
• Identify credible sources: Identify relevant as well as credible studies that you can base your review on, with the help of multiple databases or search engines. It is also a good idea to conduct another search once you have finished your article to avoid missing relevant studies published during the course of your writing.
• Take notes: A literature search involves extensive reading, which can make it difficult to recall relevant information subsequently. Therefore, make notes while conducting the literature search and note down the source references. This will ensure that you have sufficient information to start with when you finally get to writing.
• Describe the title, abstract, and introduction: A good starting point to begin structuring your review is by drafting the title, abstract, and introduction. Explicitly writing down what your review aims to address in the field will help shape the rest of your article.
• Be unbiased and critical: Evaluate every piece of evidence in a critical but unbiased manner. This will help you present a proper assessment and a critical discussion in your article.
• Include a good summary: End by stating the take-home message and identify the limitations of existing studies that need to be addressed through future studies.
• Ask for feedback: Ask a colleague to provide feedback on both the content and the language or tone of your article before you submit it.
• Check your journal’s guidelines: Some journals only publish reviews, while some only publish research articles. Further, all journals clearly indicate their aims and scope. Therefore, make sure to check the appropriateness of a journal before submitting your article.

Writing review articles, especially systematic reviews or meta-analyses, can seem like a daunting task. However, Elsevier Author Services can guide you by providing useful tips on how to write an impressive review article that stands out and gets published!

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Types of Review Articles: The Complete List

by  Antony W

June 24, 2024

There are a lot of different types of reviews. In this article, we are going to provide you with the 10 major types of reviews.

They include umbrella, scoping, critical, literature, realistic, integrative, mapping, rapid, and quantitative systematic review. We have discussed them below.

1. Umbrella Review

An umbrella review is the master review. The review takes evidence from already existing reviews to provide a high-level summary.

We use the umbrella review when we have several competitive interventions. The review is of great importance because it turns evidence into practice.

Apart from just determining what is known on a topic, the review also determines what remains unknown and recommendations.

These recommendations will be used to further carry out an investigation. Information on an umbrella review is most of the time presented using tables.

People who are much involved with this type of review are librarians. You could therefore approach a librarian if you need help with the umbrella review.

2. Scoping Reviews

A scoping review is also known as a scooping project. The review is used to categorize existing literature. The literature is grouped according to features, volume, and nature.

Most people confuse this review with the mapping review. The mapping review is more of questions while the scooping review is more based on topics.

The main reason we have scooping reviews is to identify nature through research. The review is best for realizing opportunities in existing literature, explaining functional definitions, and labeling the body of a research/literature.

A lot of time is used when preparing a scoping review. Also, instead of single structured research, you will need multiple structural pieces of research. The research is not as easy as other reviews.

3. Critical Reviews

A critical review will summarize and evaluate ideas and summarize reports on an article. Writers use this review to express what they already know about the subject.

Before expressing their view they need to think carefully and consider both weaknesses and strengths in what they are reviewing.

The best way to do critical reviews is by scanning the research to be informed and effectively reviewing the literature as you question the information provided in the text.

Look at the texts from various angles to be able to evaluate the theories, frameworks, and approaches in the text.

The elements of a critical review include the introduction, summary, critique (the main body), conclusion, and references.

4. Literature Reviews

Literature reviews are writings that academically showcase knowledge and understanding of the literature on a given topic placed in a given setting.

Unlike a literature report, a literature review will evaluate essential materials. Apart from the critic’s evaluation, a literature review should also include a brief synopsis.

Although the review forms part of a research project, it can still be treated as an independent piece of work.

The purpose of having literature reviews is to establish familiarity and get to understand research on a given field before conducting a new investigation.

A literature review is the best way to summarize and analyze a theory or investigation, identify gaps that exist in research, and identify areas of controversy.

5. Realist Reviews

A realistic review can also be called a realistic synthesis. Realistic reviews are used to study interventions that are so complex to perceive the limitations of conventional methodology. It also highlights mechanisms, context, and outcomes to explain the intended or unintended differences.

Realistic reviews are crucial because they are used to unpack the impact of complex interventions as they strive to answer questions such as “under what circumstance do a given thing work” and “to who does the thing in discussion work for”.

6. Integrative Reviews

An integrative review will summarize theatrical research to give a better understanding of a given situation.

The integrative review methodology can build upon informing research, policy initiation, and nursing science.

This review accepts the inclusion of various approaches. The integrative review approach is appropriate when research is more focused on the occurrence of interest and when research supports a vast variety of inquiries.

7. Mapping Reviews

A mapping review will classify trends/themes, categorize trends/themes and characterize patterns in evidence production.

A mapping review is supposed to make you thematically understand research on a provided topic. That way, it is possible to assess gaps that could be conveyed by future research. The review is appropriate when there are lots of foregoing literature.

8. Rapid Reviews

A rapid review is a variation of structured review. The structured review can balance constraints even when considerations are corrupt.

Rapid reviews are conducted by a lot of institutions in the world. Rapid reviews can examine reports, articles, and books to compare reviews using Scoping reviews.

9. Mixed Study Review

Researchers use the mixed study review to gather and analyze qualitative and quantitative information under the same topic of study.

The mixed study review features various methods of designs that include embedded, explanatory, exploratory, and parallel designs.

The review provides answers to questions quantitative and qualitative methods cannot answer.

Mixed study reviews can also enrich the researchers’ experience by illuminating issues of study.

10. Quantitative Systematic Reviews

Quantitative Systematic Review is of much use in nursing research. To reduce biases and make the review more trustworthy, reviews based on protocol should be used.

That way, reproducibility, and transparency shall be enhanced. Developing quantitative systematic reviews is not hard, the only thing that limits it is inadequate resources.

A quantitative systematic review aims to guide researchers as they develop systematic review protocols.  

Apart from helping researchers develop review protocol, this review also helps them enhance trustworthiness and realize the importance of completing quantitative systematic findings.

Since this review is useful in clinical practices, it is important to base it on the planned protocol. That way trustworthiness will also be enhanced.

Everything that appears on the quantitative systematic review should be outlined in detail processes used to undertake the review.

Some of these details include inclusion, exclusion criteria, and main focus search terms. The method used for data extraction, data analysis, and critical appraisal should also be included to make sure there is transparency.

About the author 

Antony W is a professional writer and coach at Help for Assessment. He spends countless hours every day researching and writing great content filled with expert advice on how to write engaging essays, research papers, and assignments.

• About Covidence and systematic reviews

What are the different types of review?

Systematic literature reviews (slrs).

SLR’s attempt to collate all empirical evidence that fit pre-specified eligibility criteria in order to answer a specific clearly-formulated research question.  A SLR uses explicit and reproducible systematic methods that are selected with a view to minimizing bias, thus providing more reliable findings from which conclusions can be drawn and decisions made.

The process starts with a research question and a protocol or research plan. A review team searches for studies to answer the question using a highly sensitive search strategy. The retrieved studies are then screened for eligibility using pre-specified inclusion and exclusion criteria (this is done by at least two people working independently). Next, the reviewers extract the relevant data and assess the quality of the included studies. Finally, the review team synthesizes the extracted study data and presents the results. 

A SLR may contain meta-analyses (statistical analysis). A SLR which is continually updated, incorporating relevant new evidence as it becomes available is often known as a living SLR.

Rapid reviews

Rapid reviews aim to produce a rigorous synthesis quickly (due to time constraints/urgency), based on a pre-defined research question. The review process for rapid reviews is the same as for a more traditional systematic review: the emphasis is on a replicable pre-specified search, and screening methods that minimize the risk of bias, although potentially isn’t as stringent as a formal systematic review.

The process operates within pre-specified limits (for example, by restricting searches to articles published during a specific timeframe) and is usually run by a multidisciplinary team with expertise in systematic review methods.

Umbrella reviews or Overview of reviews

An umbrella review is a review of multiple systematic reviews. The process uses explicit and systematic methods to search for, and identify, systematic reviews on related research questions in the same topic area. The purpose of an umbrella review is to synthesize the results of the systematic reviews across important outcomes. 

Scoping reviews

Scoping reviews are exploratory and they typically address a broad question, compared to a systematic review that typically has a more targeted question. 

Researchers conduct scoping reviews to assess the extent of the available evidence, to organize it into groups and to highlight gaps. If a scoping review finds no studies, this might help researchers to decide that a systematic review is likely to be of limited value and that resources could be better directed elsewhere.

Literature reviews or narrative reviews

Literature, or narrative, reviews provide an overview of what is known about a particular topic. They evaluate the material, rather than simply restating it, but the methods used to do this are not usually prespecified and they are not described in detail in the review. The search might be comprehensive but it does not aim to be exhaustive. Literature reviews are often topic based  and can take the form of a discussion. Literature reviews lack precision and replicability and can  present their findings in the context of what has come before. Often, this sort of synthesis does not attempt to control for the author’s own bias. The results or conclusion of a literature review is likely to be presented in a narrative format rather than statistical methods.

Take a look at the articles about the different types of review on the Covidence blog:

• Systematic review types: meet the family
• The difference between a systematic review and a literature review
• The difference between a systematic review and a meta-analysis

• SpringerLink shop

Types of journal articles

It is helpful to familiarise yourself with the different types of articles published by journals. Although it may appear there are a large number of types of articles published due to the wide variety of names they are published under, most articles published are one of the following types; Original Research, Review Articles, Short reports or Letters, Case Studies, Methodologies.

Original Research:

This is the most common type of journal manuscript used to publish full reports of data from research. It may be called an  Original Article, Research Article, Research, or just  Article, depending on the journal. The Original Research format is suitable for many different fields and different types of studies. It includes full Introduction, Methods, Results, and Discussion sections.

Short reports or Letters:

These papers communicate brief reports of data from original research that editors believe will be interesting to many researchers, and that will likely stimulate further research in the field. As they are relatively short the format is useful for scientists with results that are time sensitive (for example, those in highly competitive or quickly-changing disciplines). This format often has strict length limits, so some experimental details may not be published until the authors write a full Original Research manuscript. These papers are also sometimes called Brief communications .

Review Articles:

Review Articles provide a comprehensive summary of research on a certain topic, and a perspective on the state of the field and where it is heading. They are often written by leaders in a particular discipline after invitation from the editors of a journal. Reviews are often widely read (for example, by researchers looking for a full introduction to a field) and highly cited. Reviews commonly cite approximately 100 primary research articles.

TIP: If you would like to write a Review but have not been invited by a journal, be sure to check the journal website as some journals to not consider unsolicited Reviews. If the website does not mention whether Reviews are commissioned it is wise to send a pre-submission enquiry letter to the journal editor to propose your Review manuscript before you spend time writing it.  

Case Studies:

These articles report specific instances of interesting phenomena. A goal of Case Studies is to make other researchers aware of the possibility that a specific phenomenon might occur. This type of study is often used in medicine to report the occurrence of previously unknown or emerging pathologies.

Methodologies or Methods

These articles present a new experimental method, test or procedure. The method described may either be completely new, or may offer a better version of an existing method. The article should describe a demonstrable advance on what is currently available.

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Rich Homie Quan, the Atlanta rapper known for trap jams like ‘Type of Way,’ dies at 33

FILE - Rich Homie Quan attends the arrivals at VH1’s Hip Hop Honors at David Geffen Hall at Lincoln Center on Monday, July 11, 2016, in New York. (Photo by Brad Barket/Invision/AP, File)

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LOS ANGELES (AP) — Rich Homie Quan, the Atlanta rapper who gained mainstream fame through the trap singles “Type of Way” and “Flex (Ooh, Ooh, Ooh),” has died. He was 33.

Quan, whose legal name is Dequantes Devontay Lamar, died at an Atlanta hospital, the Fulton County Medical Examiner confirmed to The Associated Press. The medical examiner was informed of his death Thursday, said Jimmy Sadler, senior medical examiner investigator. The cause of death was not immediately available, with an autopsy scheduled for Friday.

Quan was one of the biggest names in hip-hop in the mid-2010s. He released a slew of mixtapes before he broke through in 2013 with the infectious “Type of Way.” The song became such a success that several other rappers jumped on the remix, including Jeezy and Meek Mill. He maintained his momentum, appearing on a YG track with Jeezy and releasing the London on da Track-produced song “Lifestyle” through his Rich Gang rap collective that included Young Thug and Birdman.

From AP’s archives: Rich Homie Quan spoke with AP in 2022 about his 2013-2016 run of hip-hop hitmaking that included “Type of Way,” “Flex (Ohh, Ohh, Ohh),” “Walk Thru” and “Lifestyle.” The Atlanta rapper has died at 33.

Quan followed up with “Flex (Ooh, Ooh, Ooh),” a song produced by DJ Spinz and Nitti Beatz. It became his highest charting solo single at No. 26 on the Billboard Hot 100 chart. He also featured on Lil Dicky’s viral “$ave Dat Money.”

In 2018, Quan debuted his first and only studio album “Rich as in Spirit,” which mostly went without any features — except for “Think About It,” a single with Rick Ross.

Quavo, Lil Boosie and Playboi Carti are some of the music artists who paid tribute to Quan on social media.

“Rest in Peace my brother Rich Homie Quan,” said singer Jacquees, who also called him a “legend” on X. “I love you for Life.”

Quan spoke with The Associated Press in 2022 about returning to music after an abrupt hiatus. At the time, the rapper said he was going through litigation with independent label T.I.G. (Think It’s a Game Record), but was prepared to make a comeback.

During that time, Quan ended up in a feud with his old collaborator Young Thug — who along with rapper Gunna — were among a group indicted on charges of conspiracy to violate Georgia’s RICO Act and also accused of participation in a criminal street gang.

Quan said there was no beef between him Young Thug and was open to having a conversation with him if the opportunity presented itself. He said he hated to see Young Thug locked up, adding that rappers were being targeted by law enforcement.

“I wouldn’t say unfairly targeted because at the same time, some of these rappers are putting guns in videos and, you know, it’s like social media — it goes back to the social media thing,” he said.

“I think we showing too much, I think they’re showing too much, you know what I mean. Like that’s the difference in my music, I’ma tell a story but I ain’t going to tell you how I did it,” he added. “It’s still Black art, but we’re definitely being targeted. So that’s why I’m mindful of what I say in my music.”

Landrum and Dalton reported from Los Angeles. Associated Press writer Gary Gerard Hamilton contributed to this report from New York. ___

This story has been updated to correct Quan’s age to 33 based on information from the medical examiner.