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eeg-connectivity · kosmyna-et-al-2025-brain-chatgpt

Revision d1de96c0-4648-452e-9f39-3c7912a0238b · 5/22/2026, 2:47:24 AM UTC
Claim ID
eeg-connectivity
Assertion
In an EEG study of 54 participants across three sessions writing essays with a large language model, with a search engine, or with no tools, the LLM group showed the weakest brain connectivity; an additional fourth session with role reversal involved 18 participants.
Quote
Participants were divided into three groups: LLM, Search Engine, and Brain-only (no tools). Each completed three sessions under the same condition. In a fourth session, LLM users were reassigned to Brain-only group (LLM-to-Brain), and Brain-only users were reassigned to LLM condition (Brain-to-LLM). A total of 54 participants took part in Sessions 1-3, with 18 completing session 4... EEG revealed significant differences in brain connectivity: Brain-only participants exhibited the strongest, most distributed networks; Search Engine users showed moderate engagement; and LLM users displayed the weakest connectivity.
Quote language
en
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