A psychogalvanometer measures galvanic skin response and is based on the assumption that physiological changes, such as increased perspiration, accompany emotional reactions.

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A psychogalvanometer measures galvanic skin response, which is a change in electrical conductance that is believed to be caused by increased sweat gland activity. This sweat gland activity is associated with emotional reactions, such as anxiety or excitement, making the assumption true.

A Psychogalvanometer Measures Galvanic Skin Response and Is Based on the Assumption