Study of 26,811 Chinese Students: AI Boosts Homework Scores 18% but Cuts Exam Results 20%
soumitrashukla9 · x · 2026-09-08
A paper by Strombergy, Leiz and Wu followed 26,811 students in grades 7-12 across nine schools in one Chinese county, with up to 30 months of data.
Key findings:
- After six months of AI use, homework scores rose 18%, and homework time fell from 64 to 45 minutes
- But closed-book exam scores dropped 20%
The contrast is striking: AI dramatically improves assisted performance while eroding unassisted mastery, a cautionary data point on AI dependence in education.
Related event: Study: AI Boosts Homework Scores 18% but Exam Scores Fall 20%(4 posts)→
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