Quizzing outperforms no/filler activity, fewer-question testing and restudying, with a larger advantage over no/filler activity (low reexposure) than over restudying (high reexposure); against other elaborative strategies its advantage is small and not significant.¶

Claim · All claims
Evidence · 1 study · quant-synthesis r? · q4 · i2 medium
Currency · newest study 2021 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

q4 i2 In classroom studies, testing beats no/filler activity (g = 0.610), testing with fewer questions (g = 0.465) and restudying (g = 0.330); the advantage over no/filler activity is significantly larger than over restudying (p < .001), which the authors read as consistent with the additional-exposure account. Against other elaborative strategies the advantage is small and not significant (g = 0.095, 95% CI -0.005 to 0.194, p = .062). → Yang 2020

Evidence¶

Yang 2020¶

Yang, C., Luo, L., Vadillo, M. A., Yu, R., & Shanks, D. R. (2021). Testing (Quizzing) Boosts Classroom Learning: A Systematic and Meta-Analytic Review. Psychological Bulletin. https://doi.org/10.1037/bul0000309

q4 · i2 · quant-synthesis · r?

Meta-analytic moderator analysis of control-condition strategy across classroom studies. Control strategy significantly moderated the effect (p < .001): g = 0.610 against no/filler activity (k = 345), 0.465 against fewer questions (k = 25), 0.330 against restudying (k = 162), all p < .001, and 0.095 against other elaborative strategies (k = 41, 95% CI -0.005 to 0.194, p = .062), which the authors call modest and describe as testing being "numerically" superior. Quizzing gained more against no/filler activity (low reexposure) than against restudying (high reexposure), p < .001.

"By comparison with no/filler activity ( g = 0.610), testing with fewer questions ( g = 0.465), restudying ( g = 0.330), and other elaborative strategies ( g = 0.095), testing is overall a more powerful method to enhance classroom learning."

Studies bearing on this claim¶

Is time spent elaborating on material better spent than the same time retrieving it? This table gathers the studies behind this claim and the 1 narrower claims that bear on it: 2 distinct studies (1 quant-synthesis, 1 review), q2–q4, 1 of 2 with an effect size coded. One row per study, codes as each entry records them; no effect is averaged and no verdict is drawn. Built by scripts/synthesize_claim.py from eval/synthesis/; a row that looks wrong is fixed on the claim it comes from.

Discussion¶

Related Claims¶

• Classroom testing (quizzing) significantly boosts student academic achievement to a medium extent (g = 0.499). — related
• Rereading Is A Low Utility Study Strategy — related
• A review chapter (Karpicke 2017) reports, second-hand, experiments in which retrieval practice produced more learning than concept mapping (Karpicke & Blunt 2011) and than imagery strategies such as the keyword mnemonic (Karpicke & Smith 2012) — related
• Retrieval practice improves long-term retention — related
• Retrieval Failure Reduces Benefit — related
• Practice testing yields transferrable learning relative to a nontesting reexposure control condition (d = 0.40) — related
• Summarization, highlighting, the keyword mnemonic, imagery for text, and rereading receive low utility assessments — related
• Offering a monetary incentive in both test and study conditions strengthens the case that testing has a true learning advantage over motivated restudy — a narrower finding that bears on this claim
• Retrieval practice produces better retention than restudying, with meta-analytic reviews reporting people 2.5 times as likely to remember tested information and medium-to-large classroom effects — related
• A systematic review of 50 classroom experiments found retrieval practice yields medium-to-large benefits in most cases, but only 6% were conducted in non-WEIRD countries — related
• Exposure to a video model improves trainee teachers’ skill in using questioning for retrieval by 0.80 SD relative to restudying the evidence summary — a narrower finding that bears on this claim
• The classroom testing effect increases with the number of test repetitions on the same content. — related
• Non-interactive teaching yields higher immediate scientific knowledge than restudy in secondary physics classrooms — a narrower finding that bears on this claim