title: Skin evaporative water loss (SE) and skin conductance (SC) under various psychophysiological conditions.
abstract: A procedure for measuring tonic and phasic reaction components of skin evaporative water loss (SE) on the basis of a capacitive measurement principle is developed and used in a psychophysiological study employing various stimulus conditions. SE and skin conductance (SC) are registered continuously to obtain comparative data of both biosignals for research concerning the underlying mechanisms of EDA. Results indicate that correlations of some phasic parameters of SC and SE prove to be rather high (up to 0.88), tonic parameters (the levels SCL and SEL), however, show less covariance (0.44). The intersituational discriminative efficiency of SC-parameters appears generally better than those of SE. SCL, as well as SEL, show the highest percentage of person variance. A rather high redundancy of the two biosignals, both taken from neighbouring areas of the right palm, has been found. An unexplicable residual may, however, lend some support to the notion of a partial independence of EDA from sweating.
mesh_terms: D000328:Adult; D001143:Arousal / Q000502:physiology*; D005712:Galvanic Skin Response / Q000502:physiology*; D006801:Humans; D008297:Male; D011603:Psychophysiology; D011930:Reaction Time / Q000502:physiology; D013546:Sweating; D014870:Water Loss, Insensible