Electrodermal Activity

The variation of electrical conductance in the skin caused by sweat gland activity, which is controlled by the sympathetic nervous system. EDA is used as a physiological measure of emotional arousal and stress, with applications in accessibility research for understanding the experiences of individuals who have difficulty communicating their internal states verbally. EDA consists of two components: phasic skin conductance responses (brief peaks) and tonic skin conductance level (baseline conductivity).