a measure of changes in emotional arousal recorded by attaching electrodes to any part of the skin and recording changes in moment-to-moment perspiration and related autonomic nervous system activity. SYN: galvanic skin reaction, galvanic skin reflex, psychogalvanic reaction, psychogalvanic skin reaction, psychogalvanic reflex, psychogalvanic skin reflex, psychogalvanic response, psychogalvanic skin response.