Dissertation Guidance

How to Build a Literature Review That Synthesises Research

Move beyond one-study-at-a-time summaries: define your scope, create a synthesis matrix, compare findings and build a clear rationale for your research.

By Academic Solution Editorial Team2026-10-153 min read

DissertationLiterature reviewResearch methodsCritical analysis

How to Build a Literature Review That Synthesises Research

A literature review is not a reading diary. Its purpose is to establish what is known about a research question, show where interpretations agree or differ, and explain what your project can reasonably contribute. That requires choosing a scope, evaluating evidence and connecting sources to one another.

Start with a focused review question

Before collecting papers, write down the population, context, concept or phenomenon you are investigating. For example, “What factors affect students' use of retrieval practice in first-year university courses?” is easier to review systematically than “How do students learn?” Agree the scope with your supervisor: the time period, types of studies, disciplines and any geographic boundaries may all matter.

Search in a reproducible way

Choose relevant scholarly databases available through your institution, create combinations of keywords and synonyms, and record the search date. Document why you include or exclude sources. This does not make every dissertation review a formal systematic review; it makes your selection process clearer and easier to defend. Follow any specific methodology required by your programme.

Assess quality, not just relevance

For each paper, record the research question, methods, sample or material, main findings and important limitations. A large sample does not automatically make a study appropriate for your question; methods, context and uncertainty matter. Watch for claims that exceed the evidence presented. Distinguish empirical studies from theoretical arguments and commentaries.

Create a synthesis matrix

A synthesis matrix is a working table with studies down the rows and themes across the columns. Useful themes might include definitions, theoretical approaches, methods, findings and limitations. As you fill it in, patterns become visible: several studies may support a conclusion, use different measures, or reach different findings in different settings.

Structure by ideas rather than by authors

A weak review often follows the pattern “Smith found this; Jones found that; Lee found something else.” A stronger review groups work by a question or theme, then explains relationships. For example: “Several quantitative studies report an association between X and Y, while qualitative research suggests the relationship depends on context.” After that claim, discuss the relevant studies and their limitations. The objective is not to make all findings agree; it is to represent the evidence fairly.

Identify a defensible gap

A gap is not simply a topic you found few papers about. It may concern a population that has not been studied, inconsistent definitions, a method that cannot answer a particular question, or conflicting findings that require further investigation. Explain why filling the gap would matter and whether your project is capable of addressing it. Avoid exaggerated claims such as “no researcher has ever studied this” unless your search genuinely supports them.

Close the loop with your own project

End the review by showing how the body of evidence leads to your aims, research questions and methodological choices. Check that the claims in your introduction align with the methods you will actually use. Where a point rests on another author's work, cite it correctly. APA's official style resources provide helpful guidance on acknowledging others' ideas in scholarly writing.

Before submitting the chapter

Each section is organised around a theme or issue, not a list of names.
Important claims acknowledge conflicting or limited evidence.
The scope, search approach and selection rationale are clear.
The identified research gap leads logically to the research question.
All borrowed ideas are cited and the review follows the university's guidelines.