EVIDENCE CLINIC — WORKSHOP BRIEF
Fictional teaching example

A university reports that students who attended an optional revision workshop achieved higher average marks than students who did not attend.

Students chose whether to attend. The report does not compare their earlier marks, study time or motivation.

Discuss:
1. What can this comparison tell us?
2. What alternative explanations remain?
3. Which next step would most strengthen the claim?

Prepare one recommendation and explain why it would help.

Facilitator note: This is a discussion prompt, not a scored assessment. The vote is a starting point for explaining study design, selection differences and the limits of a comparison.