AI impacts the brain activity of users, according to MIT

Publié le 2 October 2025 à 09h16
modifié le 2 October 2025 à 09h17

The impact of AI technologies on brain activity raises an urgent inquiry. Recent findings from MIT reveal a troubling phenomenon: the use of smart assistants not only reduces immediate cognitive effort but also alters future capabilities. When users rely on artificial intelligence tools, the degradation of mental skills becomes evident, thus threatening the very essence of critical thinking. The implications of these findings demand deep reflection and particular attention to education and autonomous learning.

The impact of AI on brain activity

A study conducted by the Massachusetts Institute of Technology (MIT) highlighted the notable consequences of using AI language models on users’ brain activity. Researchers found that the human brain exerts less cognitive effort when using AI tools such as ChatGPT. The negative effects on mental activity extend even into future tasks.

Methodology of the study

Scientists based their analysis on a small sample of participants, conducting essay writing trials on various topics. Three groups were formed: one group using AI, another using Google search, and a third relying solely on their intellectual capacities without any technological aid. Researchers employed electroencephalography (EEG) to monitor brain activity and assess the cognitive engagement of participants.

Observed results

The results revealed by the study showed varying levels of neural connectivity. The intensity of brain activity was highest in the group without technology, followed by the one that used Google. The group using ChatGPT exhibited the least neural activity. The link between greater technological assistance and a decrease in brain effort is noteworthy. Subjects using AI produced “statistically homogeneous” essays with fewer variations compared to the other groups.

Concept of ownership

The study also examined authors’ ability to cite their own writings and summarize their work. Participants using AI were significantly less able to do so. This decrease in content ownership reflects a depletion of cognitive engagement, making users dependent on AI to produce content.

Long-term effects of AI users

After several writing cycles, new groups were formed. Participants initially unassisted by technology were allowed to use AI, while those who had previously used AI were required to produce essays without its assistance. The results revealed weakened neural connectivity among users who were initially dependent on AI. Conversely, those who utilized their brains first demonstrated higher recall abilities, accompanied by reactivation of various brain areas.

Repercussions on learning skills

Researchers point out a potential risk of diminished learning skills mastered by future generations as AI becomes even more embedded in educational systems. The trend of using ChatGPT at the expense of human cognitive processes could compromise the ability to think, analyze, and synthesize information effectively.

Limits of the study and future research

The results of this study should be interpreted with caution due to the limited sample size. The authors state that it is necessary to include a larger number of participants with varied backgrounds to validate their conclusions. With the rise of AI in daily life and educational institutions, further investigation of the long-term effects of AI on the human brain is essential.

A reasoned use of technology

The implications of this research encourage a reconsideration of the use of AI tools. The effect on human cognition suggests a reevaluation of traditional teaching methods in light of new technologies. A cautious integration of artificial intelligence tools could enhance learning capabilities without replacing innate cognitive abilities.

Complementary studies allow for exploring the relationship between AI and human cognition, clarifying how these technologies can coexist in the educational landscape. In parallel, other research explores how AI models influence memory and learning, sparking discussions about their place in modern society.

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Help section

What is the impact of using LLMs on users’ brain activity?
The use of LLMs, such as ChatGPT, diminishes users’ brain activity, as revealed by a study from MIT. Results show that LLM users appear less mentally engaged compared to other groups that did not use technological assistance.

How does AI usage influence the ability to retain and cite information?
Participants who used an LLM showed a reduced ability to cite their own writings, indicating a decline in “ownership” or intellectual property compared to those who worked without assistance.

What groups were compared in the MIT study regarding the impact of LLMs on cognition?
The study compared three groups: those using an LLM, those using a search engine, and those using no technology to produce their work. Each showed different levels of brain activity and neural connectivity.

What long-term effects could LLM usage have on cognitive skills?
In the long term, excessive dependence on LLMs could hinder the development of cognitive skills, particularly critical thinking and the ability to process information autonomously.

What recommendations arise from the study for using AI in the learning process?
It is suggested that users fully explore their ideas without AI first, then use an LLM to enhance or add context after engaging their own thinking.

How does the difference in brain activity manifest between AI users and those writing without technological support?
AI users exhibit less activity in the gray matter compared to unsupervised groups, indicating a decrease in cognitive effort when tools like LLMs are used from the outset.

What is the role of EEG in the study on the impact of AI on brain activity?
Electroencephalography (EEG) was used to measure participants’ brain activity, allowing researchers to assess the level of cognitive engagement and mental load during writing sessions.

Why is it crucial to conduct further studies on the impact of AI on the human brain?
Additional research is needed to better understand the long-term effects of AI on cognitive abilities before considering the widespread use of LLMs as beneficial for human learning.

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