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In the latest experiment, the researchers implanted a multi-electrode array sensor into the monkey's brain, which can directly read the signals from the brain area that controls the movement of the hand and arm required to move the mouse. The algorithm developed by the researchers can interpret the above brain signals and move the cursor on the virtual keyboard and select letter keys. Researchers train monkeys to use this technique to copy what they see through the concept of “spacerâ€. The results showed that the monkey could enter the New York Times article or the passage of Shakespeare's famous book Hamlet as fast as 12 words per minute.
Earlier versions of this technology were tested on humans, but the typing speed was slow and the content was not accurate. The latest monkey experiment uses an upgraded version, which has greatly improved the speed and accuracy of typing.
Researchers believe that the latest brain-computer interaction technology they tested is fully available to humans, and the speed of typing that can be achieved is sufficient for humans to engage in meaningful conversations. Especially for those who are physically disabled and unable to communicate effectively, this new technology can translate what they think into words.
There are already some ways to help disabled people to input words, mainly by tracking eye movements or facial muscle activity. However, these methods have limitations and may require a degree of muscle control, which is difficult for some people to do.
Researchers at Stanford University say that direct reading of brain signals can overcome the limitations of the above techniques. However, compared to the monkeys in the experiment, the human input speed may be slower when using this brain sensor technology, mainly because humans also have to think about the content of the exchange, how the words are spelled, and so on, and may be in a state of distracted attention. . But even if the input speed is lower than 12 words per minute, this is a big step forward for disabled people who cannot communicate effectively.
Researchers are also continuing to improve this technology, including the possibility of eventually introducing many of the automated spelling techniques already included in smartphones to speed up input.
(Original title: New technology for brain sensing can speed up “spaced†typing)
[China Instrument Network Instrument Development] The researchers at Stanford University in the United States have recently developed a new brain sensing technology that can drive the cursor to move on the virtual keyboard by reading brain signals, thus realizing text input. Animal experiments have shown that the new technology can increase the typing speed of monkeys to 12 words per minute compared to earlier versions of these technologies.