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Other BioSensors

Galvanic skin response is a technology that has been available to the general public for decades; best known for its use in the classic “lie detector”. Often confused with EEG, galvanic skin response can be used to approximate a narrow range of mental states through measuring the electrical resistance of skin. Skin conductivity changes based on hormones the brain produces when in a state of emotional arousal. Galvanic skin response cannot distinguish between different forms of arousal ie. anger, fear, startle response, and sexual arousal.

It is important to note that galvanic skin response does not directly measure states of mind directly, but rather their effects on the body. Neurosky devices measure local field potentials, aka brain waves, which are directly caused by neural activity - No NeuroSky device has ever used galvanic skin response.