Literature matrix: map the field systematically and find the gaps

A literature matrix turns an unmanageable pile of papers into a map. It's the difference between reading the literature and commanding it.

Build the matrix by dimensions

Put the papers in rows and your analytical dimensions in columns: research question, theory, method, sample, context, main finding and limitations. Filling it in systematically reveals patterns you'd never see paper by paper — which methods dominate, which contexts are missing, where findings diverge.

From matrix to synthesis

The matrix is the tool; the synthesis is the point. Read across the columns and write themes: what the field agrees on, where it disagrees, and which questions remain unanswered. That synthesis is the backbone of your theory chapter and the justification for your own project.

Keep the matrix living. Add papers as you read and update the gap analysis. A matrix from month one is out of date by month six.

Use tools, but own the thinking

Reference tools like Zotero and searches in Oria and disciplinary databases make collection efficient, but the judgement itself — what is strong, weak or transferable to a Norwegian context — is yours to make. That's where the scholarly value lies.

Common pitfalls

• Collecting papers without a consistent structure to compare them in.
• Stopping at the matrix without writing the synthesis.
• Letting the matrix go stale during the project.

Ready to move on when…

• Papers are organised by fixed dimensions.
• You've written a synthesis across the literature.
• The gaps are clearly identified.