 Electrodermal activity

Changes in the electrical properties of skin associated with sweat gland activity. Recording electrodes can measure tonic levels and event-related changes in skin conductance. Such changes inform psychophysiology but do not uniquely identify an emotion.

Electrodermal activity (EDA), also known as skin conductance, refers to changes in the electrical properties of the skin that occur in response to various stimuli, particularly emotional or physiological arousal. It is measured by assessing the skin's electrical conductivity, which varies with moisture levels. When a person experiences stress, excitement, or other emotional states, the sweat glands are activated, leading to increased moisture on the skin and thus affecting its electrical conductance.