Brain Diver

Design, implementation and testing of a brain-computer interface (BCI) game

Together with two fellow students, I built a BCI-controlled 2D treasure hunt game. Steady-state visual evoked potentials (SSVEP) are used for game control. Players can steer the character in four directions (up, down, left, right) by focusing on a light, located at the respective position. The lights are flashing with different frequencies, which can be read out from the occipital areas of the brain (channel Oz).

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We successfully tested the game with four participants and evaluated it compared to the same game with key controls. The SSVEP-controlled version resulted in a more positive game experience compared to the traditional key-control version. We encountered  known problems with SSVEP, such as relatively low feeling of control and higher tiredness after playing the game compared to traditional key controls. However, in comparison to traditional key-control, the SSVEP-controlled game was generally rated more positive and had higher scores for immersion, flow and challenge.