{"id":104783,"date":"2026-07-14T01:30:08","date_gmt":"2026-07-14T01:30:08","guid":{"rendered":"https:\/\/www.europesays.com\/ai\/104783\/"},"modified":"2026-07-14T01:30:08","modified_gmt":"2026-07-14T01:30:08","slug":"ai-homework-tools-cut-exam-scores-by-20-study-of-26000-chinese-students-finds","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ai\/104783\/","title":{"rendered":"AI homework tools cut exam scores by 20%, study of 26,000 Chinese students finds"},"content":{"rendered":"

Artificial intelligence<\/a> boosts homework scores but cuts exam results by 20 per cent, and this \u201cbrain drain\u201d effect takes two years to fully emerge, a new study has found.<\/p>\n

Generative AI is rapidly transforming classrooms as much as workplaces, with students increasingly turning to chatbots to draft essays and solve problem sets. But is the technology a personalised tutor or a slow-acting cognitive poison?<\/p>\n

Research by scholars from Stockholm University and the University of Hong Kong, who tracked the academic performance of more than 26,000 middle school and high school students across a county in central China over 30 months, offers a quantified answer.<\/p>\n

What is the gaokao, China\u2019s most important exam?<\/p>\n

From September 2022 to June 2025, the team tracked homework grades, completion times, monthly test scores and entrance-exam results. By comparing AI users with non-users, they found a clear gap: AI boosted short-term efficiency but harmed long-term learning.<\/p>\n

Around 80 per cent of the students reported using generative AI, with Doubao, DeepSeek<\/a>, ChatGLM, Ernie Bot and Qwen<\/a> emerging as the most popular tools.<\/p>\n

Qwen is developed by the cloud computing arm of Alibaba, which also owns the South China Morning Post.<\/p>\n

AI use boosted homework scores by 18 per cent and cut homework time from 64 to 45 minutes \u2013 a clear productivity leap.<\/p>\n

But within six months, the same students\u2019 monthly exam scores had dropped by 20 per cent, and after two years their high-stakes entrance exam results fell sharply, with a 24 per cent drop in the zhongkao high school entrance exam and an 18 per cent drop in the gaokao, or National Higher Education Entrance Examination.<\/p>\n","protected":false},"excerpt":{"rendered":"Artificial intelligence boosts homework scores but cuts exam results by 20 per cent, and this \u201cbrain drain\u201d effect…\n","protected":false},"author":2,"featured_media":104784,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[24,25,2699,54311,387,26774,14328,19687,54313,54312,8496,54308,54310,37240,54309],"class_list":["post-104783","post","type-post","status-publish","format-standard","has-post-thumbnail","category-ai","tag-ai","tag-artificial-intelligence","tag-beijing","tag-chatglm","tag-china","tag-doubao","tag-english","tag-ernie-bot","tag-gaokao","tag-institute-of-psychology-of-the-chinese-academy-of-sciences","tag-qwen","tag-social-science-research-network","tag-stockholm-university","tag-university-of-hong-kong","tag-zhongkao"],"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/posts\/104783","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/comments?post=104783"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/posts\/104783\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/media\/104784"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/media?parent=104783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/categories?post=104783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/tags?post=104783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}