Problems in Measurement of Electrodermal Phenomena—choice of Method and Phenomena—potential, Impedance, Resistance1

The purpose of this study is to summarize earlier work on the galvanic skin response (GSR). Sensitive direct current and alternating current bridge measurement techniques were used. Differences were shown between potential, resistance, and impedance responses. Potential records showed two component waves with apparent sympathetic and non‐sympathetic characteristics. Methods of measurement make a great deal of difference in the type of response obtained and measurement circuits are of great importance. Complex responses from each skin area may summate or may oppose and mask each other. Three different methods are suggested as suitable for different research purposes. Electrodermal Response, GSR, Skin Potential, Skin Resistance, Skin impedance responses. (T. W. Forbes)