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Retrieval enhanced learning: Does it matter what topic is to be learned?
Ian Scott1, Timothy Frewin2, Queenie Hui3
1Department of Family Practice, Centre for Health Education Scholarship, University of British Columbia, Vancouver, BC, Canada.
Advances in Health Sciences Education : Theory and Practice
|August 13, 2026
Summary
Testing, or retrieving information from memory, generally enhances learning and retention. However, its effectiveness varies by subject matter, with gastrointestinal topics showing no benefit in this study.
Area of Science:
- Cognitive Psychology
- Medical Education
- Educational Psychology
Background:
- Retrieval practice (testing) is a known method to improve learning retention.
- The magnitude of testing's benefits can vary, with unclear reasons for these differences.
- The influence of subject matter on test-enhanced learning is not well understood.
Purpose of the Study:
- To investigate how the topic of study affects the pedagogical benefits of testing.
- To compare knowledge retention after testing versus extended study across different subjects.
- To explore factors influencing retrieval-enhanced learning.
Main Methods:
- Three experiments compared knowledge retention over one week for testing vs. extended study.
- Participants included first-year medical students and undergraduate biology students.
- Materials covered renal, gastrointestinal, and rheumatological topics, with variations in content integration.
Main Results:
- Test-enhanced learning effects were observed across most conditions.
- A notable exception was the lack of benefit when studying gastrointestinal materials.
- Exploratory analyses did not fully explain why topic influenced the magnitude of the testing effect.
Conclusions:
- Testing is generally a beneficial pedagogical tool for enhancing learning and retention.
- The effectiveness of testing may be topic-dependent, requiring further investigation.
- Continued use of testing is justified, but more research is needed to optimize its application.
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