# UC Irvine study finds ChatGPT use linked to 25% drop in exam scores

Digest AI · Research · published 2026-10-01T08:23:00Z

Canonical: https://digestai.news/story/uc-irvine-study-finds-chatgpt-use-linked-to-25-drop-in-exam-scores

## Summary

A research team at the University of California, Irvine, analyzed 10 years of data from McGraw Hill’s Aleks math platform to assess the impact of ChatGPT on student learning. By comparing student behavior before and after the model’s late-2022 launch, the study found that while AI use increased homework speed and immediate correctness, it correlated with a significant decline in long-term understanding. Specifically, students were 25% less likely to answer word problems correctly on proctored exams without AI access compared to pre-ChatGPT cohorts. Performance on visual graphing tasks, which are harder to copy into chatbots, remained stable.

The findings suggest that passive reliance on AI may weaken critical thinking skills by allowing students to offload step-by-step reasoning. A separate multi-institutional experiment cited in the study indicated that adults who relied heavily on AI for logic problems became more likely to abandon challenging questions. However, a July study from Middlebury College offers a counterpoint: students who used AI as a tutor rather than a drafting tool achieved higher test scores and essay quality. The research highlights a distinction between using AI to bypass cognitive effort and using it to support learning.

## Key points

- UC Irvine study of 10 years of Aleks data links ChatGPT use to a 25% drop in exam accuracy.
- Students showed faster homework completion and higher immediate correctness but weaker long-term understanding.
- Middlebury College research found students using AI as a tutor outperformed those using it to draft essays.

## Why it matters

The findings challenge the assumption that AI tools always enhance learning, suggesting that passive use may erode fundamental cognitive skills. This has implications for educational policy and how students and professionals integrate AI into their workflows to maintain critical thinking abilities.

## Sources

1. [Is ChatGPT Dulling Your Brain? New Studies Raise Alarming Questions.](https://entrepreneur.com/business-news/is-chatgpt-dulling-your-brain-new-studies-raise-alarming-questions) (entrepreneur.com, 2026-10-01)

## Cite

Digest AI, "UC Irvine study finds ChatGPT use linked to 25% drop in exam scores", 1 October 2026, https://digestai.news/story/uc-irvine-study-finds-chatgpt-use-linked-to-25-drop-in-exam-scores

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