Overview ‹ Your Brain on ChatGPT — MIT Media Lab

This MIT Media Lab study examined the cognitive costs of using Large Language Models (LLMs) like ChatGPT for essay writing by tracking 54 participants across four sessions using EEG brain imaging, linguistic analysis, and teacher scoring. The research found that LLM users exhibited significantly weaker neural connectivity patterns, lower essay ownership, and poorer ability to recall their own writing compared to search engine and brain-only control groups, with these cognitive deficits persisting even after switching to unaided writing. The study suggests that while LLMs offer initial convenience benefits, their prolonged use may impair learning-related cognitive skills and neural engagement across neural, linguistic, and performance metrics.

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