Jun 26, 2025, 12:00 AM
Jun 25, 2025, 3:27 PM

MIT study reveals dangers of long-term chatGPT use on brain function

Highlights
  • Research by MIT indicated negative effects of using a large language model on cognitive functions.
  • Participants who used ChatGPT showed weakened memory retention and neural connectivity compared to those who wrote essays without AI assistance.
  • These findings highlight potential risks associated with prolonged reliance on AI tools in educational settings.
Story

In a study conducted by researchers from the Massachusetts Institute of Technology, it was found that extended use of a large language model (LLM), specifically ChatGPT, can lead to a decline in cognitive abilities among users. The research involved participants writing essays over four months, with one group using ChatGPT, another using a traditional search engine, and a third relying solely on their own cognitive abilities. The results indicated that those using the LLM showed weaker neural connectivity and poorer memory recall compared to those who did not rely on such tools. Notably, in a subsequent session where participants were asked to write essays without any tools, the LLM users struggled significantly more with recalling information than the brain-only group, suggesting that there may be a decrease in learning skills among regular LLM users. The researchers documented a robust difference in neural connectivity patterns across the groups, indicating that reliance on AI tools could lead to fewer cognitive strategies and lower engagement levels in learning tasks. Dr. Harvey Castro, an emergency physician and AI futurist, commented on these findings, calling them a 'neuro-wake-up call,' especially regarding younger populations whose developing brains may be impacted most by such technology. He pointed out that while tools like ChatGPT can enhance writing speed, they come at the cost of mental engagement and memory processing. This is concerning, as it may lead to a phenomenon known as 'failure to encode', where the brain fails to process and store information properly. The researchers advised future studies to include a more diverse participant pool to better understand the effects of LLM usage and encouraged further exploration into whether the findings apply across different contexts and tasks. The implications of this research raise questions about the long-term use of AI tools in educational settings and beyond. Specifically, there is significant concern about the impact on cognitive development, learning enforcement, and information retention among users. In the workplace, for instance, while using AI agents can streamline operations and reduce workload, companies must balance these benefits with potential declines in critical thinking and intrinsic learning capabilities. Thus, this research presents a pivotal cautionary tale regarding our growing dependence on AI technology and the necessity for further investigation into its effects on the human brain over extended use.

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