Electrodermal Activity (EDA) refers to the change in electrical conductance of the skin, which is influenced by sweat gland activity. This physiological response occurs when a person experiences emotional arousal, such as stress, excitement, or fear. EDA is often measured using sensors placed on the skin, typically on the fingers or palms. Researchers and clinicians use EDA to study emotional and psychological states, as it provides insights into the autonomic nervous system's response. It is commonly employed in fields like psychology, lie detection, and biofeedback, helping to understand how emotions affect physical responses.