Both preclass (g = 0.186) and postclass (g = 0.536) quizzes enhance learning, with postclass quizzes more effective; benefits increase with treatment duration.¶

Claim · All claims
Evidence · 1 study (2 entries) · quant-synthesis r3 · q4 · i0–i1
Currency · newest study 2021 · checked against its sources 2026-10-19 (automated, 2 of 2 entries) · not reviewed by a person

Subclaims¶

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q4 i0 Preclass quizzes significantly enhance learning but with a small printed effect (g = 0.186), smaller than postclass quizzes (g = 0.536). → Yang 2020 q4 i1 Testing benefits increase systematically with treatment duration, from single class treatment (g = 0.385) to treatment lasting longer than a semester (g = 0.624). → Yang 2020 (2)

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 · i0 · quant-synthesis · r?

Meta-analytic moderator analysis of quiz administration timepoint; the review reports both timepoints enhance learning but "postclass quizzes are more effective", with printed effect sizes g = 0.186 preclass and g = 0.536 postclass.

"Both pre- ( g = 0.186) and postclass ( g = 0.536) quizzes significantly enhance learning, but postclass quizzes are more effective."

Yang 2020 (2)¶

q4 · i1 · quant-synthesis · r3

Meta-analytic moderator analysis of treatment duration; the review reports benefits "systematically increase" across duration bands with printed effect sizes g = 0.385, g = 0.521, g = 0.547, and g = 0.624, and a significantly positive relationship with the total number of class meetings.

"Testing benefits systematically increase from single class treatment ( g = 0.385), treatment lasting less than a semester ( g = 0.521), treatment lasting a whole semester ( g = 0.547), to that lasting longer than a semester ( g = 0.624)."

Discussion¶

Classroom testing (quizzing) significantly boosts student academic achievement to a medium extent (g = 0.499). — the general claim this finding bears on, with the studies behind it
Spaced Retrieval Improves Retention — the general claim this finding bears on, with the studies behind it
Offering corrective feedback after class quizzes significantly increases learning gains over withholding feedback (g = 0.537 vs. g = 0.374). — related
Implementation quality, shorter program duration, and community-based delivery are associated with lower dropout among treated students — related
The classroom testing effect increases with the number of test repetitions on the same content. — related
Test-enhanced learning generalizes across education levels, from elementary school (g = 0.328) through university/college (g = 0.486). — related

Page metadata

Field	Value
`type`	`claim`
`id`	`postclass-quizzes-and-longer-duration-larger-gains`
`title`	`Both preclass (g = 0.186) and postclass (g = 0.536) quizzes enhance learning, with postclass quizzes more effective; benefits increase with treatment duration.`
`description`	`Both preclass (g = 0.186) and postclass (g = 0.536) quizzes enhance learning, with postclass quizzes more effective; benefits increase with treatment duration.`
`status`	`review`
`evidence_strength`	`moderate`
`newest_evidence`	`2021`
`source_checked`	`2026-10-19`
`generated`	by `process:wiki-ingest` on `2026-10-13`
`trust`	unverified — no one has confirmed this page's content
`sources`	2 — `yang-2020`, `yang-2020-2`

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