Neuroscientists behind the project called it “BrainNet”, a “multi-person non-invasive direct brain-to-brain interface for collaborative problem solving”.
In layman’s terms, researchers from the University of Washington and Carnegie Mellon University figured out a way to connect three brains (still attached to their human hosts!) and have the owners of said brains make collective choices together without speaking.
And they tested it by playing Tetris. Because of course they did.
The team used “electroencephalograms” (EEGs) to record electric impulses from two human brains and “transcranial magnetic stimulation” (TMS) to deliver information to a third brain. The end result: an interface that allowed three human subjects to collaborate and solve Tetris problems using brain-to-brain communication.
In the test, two “senders” were connected to EEG sensors and communicated to a third person, the “receiver” via a TMS helmet with the ability to send flashes directly to the brain.