Researchers at MIT have found that using ChatGPT for writing tasks significantly reduces brain activity. In a study of 54 students writing essays, those who used the AI chatbot showed up to 55% less brain activation compared to those who wrote without technology. The findings add to growing concerns about "cognitive offloading" to AI.

The study split students into three groups: ChatGPT users, Google search users, and a control group with no technology. While the control group showed widespread brain activity described as "on fire" by researcher Nataliya Kosmyna, ChatGPT users showed minimal activation in areas related to creativity and information processing. Students who used AI couldn't quote from their own essays and reported feeling no ownership over their work.

Four months later, researchers tested the same students without AI assistance. Those who had originally used ChatGPT still showed lower neural connectivity than peers in the other groups. The concern now is that as LLMs handle more cognitive tasks, the long-term effects on memory and problem-solving could be severe. A small subset of participants who used AI as a data-gathering tool while doing their own analysis showed stronger brain activation and more accurate results.