How to Build a Literature Synthesis Matrix
A synthesis matrix helps you compare studies before writing a literature review. Its purpose is to reveal relationships, disagreements and limits in the evidence, rather than to collect disconnected summaries.
Start with a focused question
Write the population or context, the main concept and the type of evidence you need. For example: how do workplace norms relate to employees’ energy-saving intentions? This is an illustrative planning question, not a finding.
Create useful columns
| Column | What to record |
|---|---|
| Source | Author, year, title, identifier and the page supporting your note. |
| Context | Location, population, setting and relevant boundaries. |
| Method | Study design, data source, measures and analytical approach. |
| Finding | The result relevant to your review question, including uncertainty. |
| Limitations | Constraints identified by the authors and your justified appraisal. |
| Theme | The concept or debate to which the source contributes. |
Turn notes into synthesis
- Group sources by question or theme, not only by publication year.
- Compare whether studies examined similar populations and used comparable measures.
- Identify agreement, disagreement and plausible methodological reasons for differences.
- Write a theme-level conclusion that reflects the strength and boundaries of the evidence.
- Check every claim against the original source before drafting.
A worked planning example
Suppose one source uses interviews about organisational culture while another uses a survey of reported intentions. They may address the same theme, but they do not measure the same outcome. Your synthesis should explain that difference instead of treating their results as interchangeable.
Use the matrix to evaluate a research gap
An empty cell is not automatically a research gap. Check whether the issue matters, whether relevant evidence exists outside your initial search and whether your proposed method can answer the question. Record the search boundaries that support your assessment.
Common mistakes
- Copying abstracts without recording methods or limitations.
- Treating self-reported intentions as observed behaviour.
- Using publication recency as a substitute for relevance.
- Making stronger causal claims than the study design permits.
For document structure examples, explore our watermarked research samples. For feedback on your organisation and critical synthesis, see literature review support. Samples are for learning and reference; your final chapter must reflect your own work and properly attributed evidence.
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