title: A continuous measure of phasic electrodermal activity.
abstract: Electrodermal activity is characterized by the superposition of what appear to be single distinct skin conductance responses (SCRs). Classic trough-to-peak analysis of these responses is impeded by their apparent superposition. A deconvolution approach is proposed, which separates SC data into continuous signals of tonic and phasic activity. The resulting phasic activity shows a zero baseline, and overlapping SCRs are represented by predominantly distinct, compact impulses showing an average duration of less than 2 s. A time integration of the continuous measure of phasic activity is proposed as a straightforward indicator of event-related sympathetic activity. The quality and benefit of the proposed measure is demonstrated in an experiment with short interstimulus intervals as well as by means of a simulation study. The advances compared to previous decomposition methods are discussed.
authors.affiliation: Department of Psychology, University of Graz, Austria. mathias.benedek@uni-graz.at
authors.forename: Mathias
authors.initials: M
authors.lastname: Benedek
authors.forename: Christian
authors.initials: C
authors.lastname: Kaernbach
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D005260:Female; D005712:Galvanic Skin Response; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000379:methods*; D010507:Periodicity; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors; D055815:Young Adult
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