AI BriefingStudy Finds Brain Activity Drops Up to 55% When Using AI
Key point
An MIT study found that using generative AI reduces brain activity by 55% compared to regular search, revealing a phenomenon called 'cognitive debt.'
Details
According to a study conducted by MIT researchers in June 2025, human brain activity was found to be significantly lower when using generative AI.
The research team divided 54 adults aged 18-39 into three groups and conducted a text-writing experiment:
- Neurons only group
- Google search group
- ChatGPT (generative AI) group
The results showed that brain activity decreased by 34% when using a search engine, while it decreased by as much as 55% when using generative AI.
The researchers named this phenomenon 'cognitive debt' and warned that it could lead to reduced learning ability and hindered development of critical thinking. Concerns have particularly been raised about the negative impact this could have on children and adolescents, who are at a stage of cognitive development.
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