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EDA - Electrodermal Activity / (GSR Galvanic Skin Response)
Measure emotions through skin conductance for more insights
Electrodermal activity EDA / GSR (Electrodermal Activity) measures the electrical activity of the skin and is often used as a measure of emotional and psychological arousal. Applications of EDA include studying stress and anxiety, monitoring emotional responses to advertising and media, and assessing the effectiveness of therapeutic interventions.
How does it work?
Electrodermal activity-EDA / Galvanic skin response changes in physical or emotional state.
Electrodermal activity EDA / GSR data is collected by two electrodes attached to two separate fingers on one hand. These electrodes detect stimuli in the form of changes in moisture, which increase skin conductance and changes the electric flow between the two electrodes. Therefore, GSR data is dependent on sweat gland activity, which is correlated to participant level of stress (Bakker, Pechenizkiy, & Sidorova, 2011). PPG signals are collected through photodetectors on skin surfaces (usually a finger or ear-lobe) which measure volumetric variations in blood circulation, giving an accurate and non-intrusive method to monitor participant heart rates (Castaneda, Aibhlin, Ghamari, Soltanpur, & Nazeran, 2018). Together, GSR and PPG data produce an accurate depiction of participant level of stress.
GSR-EDA-electrodermal-activity