On randomly assigned proctored retention items, odds of correct response on AI-susceptible items decline 25.0% cumulatively after ChatGPT's release¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 2026 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Logistic item and quarter fixed-effects models estimate a 2.61% per-quarter decline in log-odds of correct response on AI-susceptible items in proctored conditions, cumulating to a 25.0% odds reduction (odds-ratio multiplier 0.75). → Rismanchian 2026

Evidence¶

Rismanchian 2026¶

Rismanchian, S., Uzun, H., Matayoshi, J., Cosyn, E., & Kurd-Misto, E. (2026). Faster Completion, Less Learning: Generative AI Reduced Study Time on Math Problems and the Knowledge They Build. arXiv preprint. https://arxiv.org/abs/2605.21629 doi:10.48550/arxiv.2605.21629

q2 · i? · causal · r2

Logistic fixed-effects model on 6,698 randomly assigned extra retention item observations across 66 topics and 22 quarters, proctored conditions. Estimate "β=− 0.0260, p= 0.037"; randomization inference within difficulty quartiles gave p= 0.027.

"a 2.61% per-quarter decline in the log-odds of correctly answering AI-susceptible items relative to AI-resistant items in proctored conditions ( β=− 0.0260, p= 0.037), accumulating to a 25.0% cumulative reduction in the odds of correct response"

Discussion¶

Related Claims¶

• The post-ChatGPT learning-time decline follows an age gradient: largest in high school (31.3% cumulative), small in middle school (9.0%), and undetectable in Grade 5 — related
• College students' learning time on AI-susceptible word problems declines 2.80% per quarter relative to graph-based problems after ChatGPT's release, cumulating to 26.9% over eleven quarters — related
• The same retention estimator applied to non-proctored assessment yields an opposite-signed 85% increase in odds of correct response on AI-susceptible items — related
• The post-ChatGPT response-time divergence on AI-susceptible items vanishes entirely under proctored assessment — related