How to synthesise findings across multiple studies

Every literature review chapter faces the same problem: fifteen papers, each with its own findings, and a requirement to say what they mean together. Summarising paper by paper (“Smith found X. Jones found Y.”) is the most common reason review chapters lose marks. Synthesis — organising findings into cross-study themes — is what markers and journals actually want.

Summary vs. synthesis

A summary reports each study in turn; a synthesis reorganises the material around ideas. In a synthesis, one paragraph might draw on four studies that converge on the same finding — and note the one that contradicts them. To get there you need a unit of analysis smaller than “the paper”: the code, a short label for one specific finding, backed by a quote. Codes from different studies can then be compared, grouped, and counted — that grouping is your theme structure. See what is thematic analysis for the underlying method.

The process, step by step

  1. 1. Select your studies. 3–20 sources on one question. More than that, batch by sub-topic.
  2. 2. Extract the findings sections. You are synthesising what the studies found — not their methods or introductions.
  3. 3. Code each study. Attach short labels to each distinct finding, with a verbatim quote per code.
  4. 4. Cluster codes across studies. Group related codes from different papers into candidate themes; a theme supported by one study is usually not a theme.
  5. 5. Review and name. Check each theme against its codes, then give it a definition and a name.
  6. 6. Write the narrative. For each theme: which studies support it, how they converge, where they diverge.

Which framework to cite

For coursework and dissertations, Braun and Clarke's reflexive thematic analysis is the safest citation. For a formal systematic review or comprehensive literature review chapter, Thomas and Harden's thematic synthesis is the purpose-built method — its three stages (line-by-line coding, descriptive themes, analytical themes) map directly onto the steps above. Read our complete guide to thematic analysis for a literature review for full breakdown and saturation guidelines. Framework analysis suits health and policy reviews where a charting matrix is expected.

Doing it in minutes instead of weeks

Finish your thematic analysis on time — with total ease, without sacrificing academic rigour. The thematic analysis tool automates line-by-line coding and theme clustering across multiple studies, backed by verbatim quotes ready for your synthesis chapter.