Galvanic Skin Response (GSR) Analysis
GSR is a simple and reproducible method of capturing the autonomic nerve response as a parameter of the sweat gland function. Physically GSR is a change in the electrical properties of the skin in response to different kinds of stimuli. Any stimulus capable of an arousal effect can evoke the response and the amplitude is more dependent on the surprise effect of the stimulus than on the stimulus intensity. Normally reproduced GSRs have common features in their waveshapes, and response amplitudes tend to habituate.
We have developed an advanced method for analyzing the patterning of successive GSRs. The proposed method is based on principla component analysis (PCA) and on regression methods. The method can be used to discriminate GSR sets of different degrees of waveshape similarity.