Mind Games
Ollie Bland
Few video games are more basic than Pong, but Charles Moyes
and Mengxiang Jiang’s version is incredibly complex. The two Cornell
University students built a custom electroencephalography (EEG) device
so they could control the game’s onscreen paddle with their minds.
The alpha waves that EEG machines read are faint electrical signals;
Moyes and Jiang ran the EEG readings through an amplification circuit to
filter and boost the signals. The amplified readings are then digitized
and sent over USB to a computer running the game.
Spiking alpha waves produced during relaxation move a player’s paddle
up, and smaller waves, indicating concentration, move it down. The size
of the waves determines how much the paddle moves.
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