Brain research Machines can read the thoughts of trained people better
Humans can learn to share their thoughts with machines. In a new study, researchers at the University of Geneva have shown that so-called brain-machine interfaces can read the thoughts of specially trained people better than those of untrained people.
24.03.2025, 14:18
SDA
The researchers hope that this will enable a new form of communication for people who are no longer able to speak after a stroke, for example, as the University of Geneva announced on Monday.
For the study, the researchers attached electrodes to the scalp of 15 volunteers in order to detect and record voltage fluctuations in the brain. Wired up in this way, the volunteers had to imagine the syllables "fo" and "gi", i.e. only pronounce them internally.
The brain activity was analyzed in real time. The participants received visual feedback on a screen that showed how well the system had understood the syllables. The clearer their perception, the more a display filled up. They trained in this way for five days.
Importance of training underestimated
Despite individual differences in learning progress, the volunteers became significantly better at communicating the two syllables with the machine, as the researchers showed in the study published in the journal "Communications Biology". In contrast, a control group with irregular visual feedback showed no comparable progress.
According to the university, this research underlines the previously underestimated importance of training when using brain-machine interfaces (BMIs).
