Drill effect is greatest on the poorest portion of the class and decreases class variability¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 1915 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? The effect of drill seems greatest on the poorest portion of the class and decreases the variability of a given class. → Brown 1915

Evidence¶

Brown 1915¶

Brown, J. C. (1915). An Investigation on the Value of Drill Work in the Fundamental Operations of Arithmetic. Part II. The Journal of Educational Psychology. https://psycnet.apa.org/journals/edu/

q2 · i? · causal · r1

Author's interpretation of the paired comparisons of the best and poorest 19 pupils in drill and non-drill sections. The statement is hedged ("seems to be greatest") and is offered as consistent with the first study; no effect size or test statistic is printed.

"The effect of the drill here, as was the case in the first study, seems to be greatest on the poorest portion of the class. Jt decreases the variability of a given class."

Discussion¶

Related Claims¶

• Best and poorest drill pupils both gained more than their non-drill counterparts, narrowing the within-class gap — possibly the same claim (merge candidate)
• Mindfulness training improves EFs most in 7–9 year-olds with initially poorer EFs, and yoga improves EFs where physical training alone does not — related
• Drill classes improved from two to three times as much as non-drill classes in arithmetic fundamentals — a broader claim this one bears on