Literature Review Methodology: How to Structure and Write Your Review

The literature review methodology is the section of your dissertation or thesis that explains how you conducted your search and selected sources for review — not just what those sources say. Many students write literature reviews that summarise studies in sequence without justifying how they identified and selected those studies. This is a significant weakness that examiners at postgraduate and doctoral level will flag immediately. A methodologically sound literature review demonstrates that your engagement with the scholarly field was systematic, transparent, and reproducible.

The approach you take to your literature review methodology depends on the type of review you are conducting. A standalone systematic review follows strict protocols (PRISMA, PICO). An embedded dissertation literature review is typically a narrative or integrative review. Both require methodological transparency, but at different levels of rigour.

Types of Literature Reviews

Understanding which type of literature review you are conducting shapes your methodology:

• Narrative review — a broad, discursive review of literature that synthesises key themes and debates without a formal search protocol. Most undergraduate and postgraduate dissertation literature reviews are narrative reviews.
• Systematic review — a highly structured review following explicit, replicable search and selection protocols. Requires a PRISMA flow diagram and often meta-analysis. Standard in health sciences, psychology, and education research.
• Integrative review — combines diverse methodologies (qualitative and quantitative) to develop a holistic understanding. Useful in interdisciplinary fields.
• Scoping review — maps the breadth of a field without the strict quality assessment of a systematic review. Used to identify gaps and future research directions.

For a full breakdown of review types and how to structure your findings, see our companion guide on conducting a systematic literature review.

Developing Your Search Strategy

Your search strategy documents how you located the literature you reviewed. A transparent search strategy allows others to replicate your search and verify your conclusions.

Key components include:

• Databases — list the specific databases searched: Google Scholar, JSTOR, PubMed, CINAHL, PsycINFO, Scopus, Web of Science. Each database covers different disciplines; selecting appropriate databases demonstrates methodological awareness.
• Search terms — document your exact search strings, including Boolean operators (AND, OR, NOT). For example: (“academic writing” AND “graduate students”) OR (“university writing” AND “postgraduate”). If you used truncation (*) or wildcard (?), note this.
• Date range — specify the publication years you searched within (e.g., 2015–2026). Justify the range — are you interested in recent developments only, or does the topic require historical breadth?
• Language restrictions — note if you limited searches to English-language publications and acknowledge any implications of this for generalisability.

Inclusion and Exclusion Criteria

Inclusion and exclusion criteria are the filters that determined which studies you reviewed and which you discarded. They must be defined in advance (not post hoc) and applied consistently across all search results.

Typical inclusion criteria:

• Published in a peer-reviewed journal or academic publisher
• Directly relevant to the research question
• Published within the specified date range
• Available in full text

Typical exclusion criteria:

• Grey literature (government reports, non-peer-reviewed sources) — unless explicitly included
• Studies outside the defined geographic or demographic scope
• Sample sizes below a minimum threshold (for empirical studies)
• Editorials, conference abstracts, or opinion pieces without empirical basis

Present your inclusion/exclusion criteria in a table within your methodology section for clarity. For systematic reviews, a PRISMA flow diagram visualises how many records were identified, screened, and finally included.

Choosing a Synthesis Approach

Once you have your selected literature, you need to decide how to synthesise it. Synthesis is the analytical process of drawing connections across sources — not summarising each source in turn, but identifying agreements, contradictions, gaps, and overarching themes.

• Narrative synthesis — the most common approach in social science dissertations. Organise sources thematically, identify where they converge and diverge, and build a critical argument about the state of the field.
• Meta-analysis — statistically combines quantitative results from multiple studies to produce an aggregate effect size. Requires a sufficient number of methodologically comparable studies.
• Meta-ethnography — synthesises findings from qualitative studies by translating concepts across studies to develop a new interpretive framework.
• Thematic synthesis — combines elements of thematic analysis with literature synthesis; particularly useful when synthesising qualitative findings across studies.

Writing the Methodology Section

The methodology section of your literature review should be written concisely but completely. Aim for 300–600 words for a narrative dissertation review, and 600–1,200 words for a formal systematic review. Structure it as follows:

1. State the type of review conducted and its rationale
2. List databases searched with justification for selection
3. Provide exact search strings or representative examples
4. State inclusion and exclusion criteria (use a table)
5. Report the number of results at each stage of screening
6. Describe the synthesis approach used

Write in past tense (“Searches were conducted…” not “Searches will be conducted…”). Avoid vague language (“some databases,” “relevant articles”) — precision is the mark of methodological rigour.

For guidance on writing your broader methodology chapter, including your philosophical position and research design, see our guide on research methodology. Students at universities in Spain (tesify.es) and France (tesify.fr) face similar requirements for systematic literature methodology sections in their TFG and mémoire dissertations.

Common Literature Review Methodology Errors

• No methodology at all — presenting a literature review without explaining how sources were identified is the most common omission
• Post hoc criteria — defining inclusion/exclusion criteria after selecting sources introduces selection bias
• Opaque search strings — stating “Google Scholar was searched” without specifying what terms were used is insufficient
• No justification for date range — explain why you limited to a specific time period
• Summary not synthesis — a literature review that describes each source separately without analytical connection is not a review, it is an annotated bibliography

Frequently Asked Questions