Mastery learning effects are larger for lower-aptitude students, narrowing the spread of achievement in a class¶

Claim · All claims
Evidence · 1 study · quant-synthesis r? · q4 · i2 medium · n=13 studies
Currency · newest study 1990 · checked against its sources 2026-10-16 (automated, 1 of 1 entry) · not reviewed by a person

Who gains most from mastery learning programs: effects by prior aptitude, and on the spread of final examination scores.

Subclaims¶

q4 i2 In 13 studies reporting effects by aptitude, low-aptitude students gained 0.61 SD and high-aptitude students 0.40 SD (difference not significant); in 37 of 52 studies the spread of final scores was smaller in mastery classes, 77% of the control group's variation on average. → Kulik et al. 1990

Evidence¶

Kulik et al. 1990¶

Kulik, C.-L. C., Kulik, J. A., & Bangert-Drowns, R. L. (1990). Effectiveness of Mastery Learning Programs: A Meta-Analysis. Review of Educational Research, 60(2), 265–299. doi:10.3102/00346543060002265

q4 · meta-analysis (13 studies reporting effects by aptitude) · i2 · medium effect, ES = 0.61 SD low-aptitude vs 0.40 SD high-aptitude · n=13 studies · quant-synthesis · r?

Thirteen evaluations reported examination effects separately for students of different aptitude. In 9 of them the effect was stronger for less able students; on average low-aptitude students gained 0.61 SD and high-aptitude students 0.40 SD, a difference the authors report as not significant. Separately, in 37 of the 52 studies reporting score spread, final examination scores varied less in mastery classes (on average 77% of the control group's variation), and the correlation between aptitude and achievement was lower.

"The average effect size in all 13 studies was also higher for the less able students (M = 0.61) than for the more able ones (M = 0.40). The difference, however, is not significant (t = 1.23, p > .10)."

Studies bearing on this claim¶

For whom: does it help weaker and stronger students, and at which ages and in which subjects? This table gathers the studies behind this claim and the 3 narrower claims that bear on it: 3 distinct studies (2 quant-synthesis, 1 causal), q2–q4, 2 of 3 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¶

Both groups gain, so mastery gating does not trade the stronger students' learning for the weaker students'. The aptitude difference itself is not significant in 13 studies, so the narrowing of score spread is the firmer of the two results.

Learner Variables¶

• General Cognitive Ability — moderator: an instructional effect differs with it

Related Claims¶

• In the few studies that split by ability, learning techniques helped low-ability students and not high-ability students — the general claim this finding bears on, with the studies behind it

• Mastery Learning Improves Outcomes — the same synthesis, overall effect

• Group-based mastery learning programs yield positive achievement effects in every included study, but effect sizes vary so widely that an average was deemed inappropriate — related
• Achievement effects of group-based mastery learning are larger for elementary students than for high school or college students — related
• Female students show stronger academic self-confidence, more positive attitudes, higher achievement, and fewer absences, but this advantage diminishes almost completely under mastery learning — related