Study finds AI tools improve homework scores but lower exam performance among students

Aug 21, 2026

AI Summary

Research involving 27,000 students in China indicates that while the use of AI tools improved homework scores by 18%, it led to a 20% decline in exam performance compared to peers who did not use AI. This study highlights the potential drawbacks of relying on AI in educational settings.

A study tracked 27,000 students aged 12 to 18 in China regarding their use of AI tools for homework and exams.
Approximately 80% of students reported using AI models, while 20% formed a control group without AI assistance.
Students using AI saw an 18% increase in average homework scores over six months.
In contrast, these students scored 20% lower on exams taken without AI compared to their non-AI-using peers.
The study reflects a growing trend of AI adoption in education, with similar findings reported in other research.
Concerns have been raised about students potentially relying on AI-generated answers rather than engaging with the material.
A separate study at the University of Pennsylvania found that while AI tools improved short-term practice performance, the benefits did not extend to closed-book tests.
Experts caution that while AI can enhance learning, overreliance may hinder the development of critical cognitive and social skills.
The full study from Stockholm University and the University of Hong Kong has not yet been independently verified.

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Study finds AI tools improve homework scores but lower exam performance among students

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