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The electrodermal activity (EDA) is a reliable physiological signal for monitoring the sympathetic nervous system.Several studies have demonstrated that EDA can be a source of effective markers for the assessment of emotional states in humans.There are two main methods for measuring EDA: endosomatic (internal electrical source) and exosomatic (external electrical source).Even though the exosomatic approach is the most widely used, differences between alternating current (AC) and direct current (DC) methods and their implication in the emotional assessment field have not yet been deeply investigated.This paper aims at investigating how the admittance contribution of EDA, studied at different frequency sources, affects the EDA statistical power in inferring on the subject’s arousing level (neutral or aroused).To this extent, 40 healthy subjects underwent visual affective elicitations, including neutral and arousing levels, while EDA was gathered through DC and AC sources from 0 to 1 kHz.Results concern the accuracy of an automatic, EDA feature-based arousal recognition system for each frequency source.We show how the frequency of the external electrical source affects the accuracy of arousal recognition.This suggests a role of skin susceptance in the study of affective stimuli through electrodermal response

Skin Admittance Measurement for Emotion Recognition: A Study over Frequency Sweep