How to Make a Synthesis Matrix for Research
Make a synthesis matrix by placing sources on one axis and shared questions or themes on the other.

Keep a source log by creating one retrievable record per source when you first consult it.
Identify the conclusion, list the reasons offered for it, and check both those reasons and the connection between them. Make any added assumption explicit.
Thinking ToolsTo evaluate source credibility, first state the exact claim and its stakes. Identify the creator, publisher, source type, date, purpose, and relevant access.
Make a synthesis matrix by placing sources on one axis and shared questions or themes on the other.
An observation records what was directly noticed, measured, or documented under stated conditions.
A primary source provides original evidence or a firsthand record relevant to your research question.