Detailed written answer keys at checkpoints significantly improved momentum post-test scores over brief answers, but not kinetic energy scores¶

Claim · All claims
Evidence · 1 study · causal r2 · q2 · i1 small
Currency · newest study 2011 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

q2 i? Replacing brief written checkpoint answers with detailed answer keys including reasoning (Style 2) increased post-test scores on both topics, but statistical significance was reached only for the momentum questions (p = 0.42 for kinetic energy, p < 0.05 for momentum). → Slezak 2011

Evidence¶

Slezak 2011¶

Slezak, C., Koenig, K. M., Endorf, R. J., & Braun, G. A. (2011). Investigating the Effectiveness of the Tutorials in Introductory Physics in Multiple Instructional Settings. https://arxiv.org/abs/1110.0050 doi:10.48550/arxiv.1110.0050

q2 · i1 · causal · r2

Comparison of Style 2 (N=45, detailed written answer keys, no verbal TA interaction) against the prior study's cooperative-groups-with-brief-answers style (N=58). Post-test means were 22% and 32% for kinetic energy and momentum.

"Although Style 2 demonstrated increases in student post-test scores for both the kinetic energy and momentum questions, statistical significance was only found for the momentum questions ( p = 0 .42 and p < 0.05 respectively)."

Discussion¶

Related Claims¶

• Feedback Enhances Retrieval Practice — the general claim this finding bears on, with the studies behind it
• The computer-based implementation showed no significant difference from individual paper-based work with brief written answers — related
• For material students have prior knowledge of (work-energy theorem), tutorial effectiveness depends significantly on teaching quality, with the ideal Socratic implementation best — related
• For novel material (impulse-momentum theorem), no statistical difference emerges among group-based styles with verbal TA interaction; the tutorial material itself dominates — related
• Socratic dialogue by a skilled but inefficient teaching assistant underperformed: lengthy, unsummarized checkpoints may leave students without clear understanding — related