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A long-term study involving 26,000 Chinese middle and high school students found that after students independently used AI, homework performance improved by 18%, but closed-book exam scores dropped by 20% within six months. Zhongkao and Gaokao scores dropped by 24% and 18% respectively, and 81% of students used AI to complete their homework.
A study analyzing 3.2 million ALEKS math learning records found that after ChatGPT became available, students finished AI-friendly word problems faster but learned less, showing a 25% drop in retention. The research highlights that using AI to bypass mental effort undermines knowledge building.