Retrieval practice (testing to learn)

Quiz yourself to learn, not just to check what you already know.

Why it works

Pulling information out of memory strengthens it far more than putting it back in by rereading, because retrieval reconsolidates and reinforces the memory trace and makes it easier to access later. Each successful effortful recall is itself a powerful learning event, not merely a measurement. This is why testing should be a study tool, not only an assessment.

How to do it

1. After studying, close the material and write down everything you can recall.
2. Use flashcards or practice questions that force production, not recognition.
3. Test before you feel ready; the difficulty is where the benefit comes from.

Evidence

The testing effect is one of the most replicated findings in cognitive psychology: across many controlled experiments and meta-analyses, retrieval practice produces substantially better long-term retention than restudying the same material. A meta-analysis of 118 practice-testing studies (Adesope et al., 2017) confirms a robust medium-to-large benefit that holds across formats, subjects, and learner populations. (rct)

Retrieval helps most when it is effortful but mostly successful; with material that is far too hard, some initial study or hints are needed before testing pays off.

Sources

• Roediger & Karpicke (2006), "Test-Enhanced Learning", Psychological Science
• Roediger, H. L., & Karpicke, J. D. (2006). Test-enhanced learning: Taking memory tests improves long-term retention. Psychological Science, 17(3), 249–255.
• Karpicke, J. D., & Blunt, J. R. (2011). Retrieval practice produces more learning than elaborative studying with concept mapping. Science, 331(6018), 772–775.
• Roediger, H. L., & Butler, A. C. (2011). The critical role of retrieval practice in long-term retention. Trends in Cognitive Sciences, 15(1), 20–27.
• Adesope, O. O., Trevisan, D. A., & Sundararajan, N. (2017). Rethinking the use of tests: A meta-analysis of practice testing. Review of Educational Research, 87(3), 659–701.

Common mistake

Rereading and highlighting because it produces a comforting sense of fluency, then mistaking that recognition for the ability to recall the material when it counts.