Rate of improvement in addition practice shows negative acceleration, with the first half of practice the more productive¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 1914 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Gross gain per unit of time declines over the course of practice; the first half of the practice is the more productive. → H. H. Hahn and E. L. Thorndike 1914

Evidence¶

H. H. Hahn and E. L. Thorndike 1914¶

H. H. Hahn and E. L. Thorndike. (1914). Some Results of Practice in Addition Under School Conditions. The Journal of Educational Psychology, Volume V, Number 2. https://www.google.com/search?q=Hahn+Thorndike+1914+Some+Results+of+Practice+in+Addition+Under+School+Conditions

q2 · i? · causal · r2

Analysis of practice-curve records for all groups, shown in Figs. 1-10 and combined for grades 6 and 7 in Fig. 9 and grades 4 and 5 in Fig. 10, with scores expressed as percentages of initial score in Figs. 11 and 12. The curves show "The first half of the practice is the more productive."

"There are notable changes in the rate of improvement, this being defined as the gross gain in score per unit of time. The first half of the practice is the more productive."

Discussion¶

Related Claims¶

• Note-level singing correctness rises with practice repetition in a negatively accelerated curve, gaining about 7 percentage points over 30 repetitions — a narrower finding that bears on this claim
• Within-year (fall-to-spring) achievement gains decelerate linearly as students move through school, at roughly 1.4 to 4 RIT per year depending on subject and centering grade — related