Distinguish practicing retrieval from simply rereading material.
Limited evidenceSupporting studies exist, but they are few and conditions matter.
Example
Editorial example: recall one workflow step next week before revealing the answer.
Why it works
Roediger and Karpicke compare restudy and recall tests with prose materials. Immediate performance and delayed retention need not rank conditions identically.
On the web
Pair low-stakes questions with answer feedback. Avoid penalties and assess later use on different questions.
When it backfires
These are learning studies, not support for withholding information to force a purchase. Do not test recall of unseen material.
Sources
Compares restudy and recall testing and examines delayed retention.
Roediger, H. L., & Karpicke, J. D. (2006). Test-enhanced learning. Psychological Science, 17, 249–255. Open source