SEATTLE — According to a study published in Nature, BrainNet is the first brain to brain interface to link three people and allow two way communication using only their mind.<br /><br />Two senders and a receiver cooperate in a Tetris-like game, using EEG and transcranial magnetic stimulation.<br /><br />According to the study, each of the senders is provided with a monitor that displays the game, and two LED lights flashing at different frequencies.<br /><br />The senders give a binary yes or no signal to the receiver by looking at one light or the other, which indicates whether the Tetris block should be rotated to win the game.<br /><br />When one sender says yes, a transcranial stimulator informs the blindfolded receiver by stimulating the visual cortex, causing the receiver to see a spot or ring of light.<br /><br />A no response did not engage the stimulator and the receiver did not visualize a light spot or ring.<br /><br />The senders can check the receiver's decision and send corrections via BrainNet if they disagree.<br /><br />The results showed that three people were better than one in playing the game.<br /><br />When researchers flipped the responses of a sender deliberately, the receiver learned to disregard bad information, showing BrainNet can overcome interference or an unreliable player.
