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An EDA Primer for Polygraph Examiners
Polygraph
  • Mark Handler, American Association of Police Polygraphists
  • Raymond Nelson, Lafayette Instrument Company
  • Donald Krapohl, American Polygraph Association
  • Charles R. Honts, Boise State University
Document Type
Article
Publication Date
4-1-2010
Abstract
Of all the signals collected and analyzed during psychophysiological detection of deception (PDD) or polygraph testing, the electrodermal response (EDR) is the most robust and informative. The EDR is easily collected and is simple to measure and interpret (Blalock, Cushman, & Nelson, 2009). Several studies indicate the electrodermal component provides the greatest contribution to diagnostic accuracy in the comparison question test (Blalock, Cushman, & Nelson, 2009; Capps & Ansley, 1992; Harris & Olsen, 1994; Kircher & Raskin, 1988; Krapol & Handler, 2006; Krapohl & McManus, 1999; Nelson, Krapohl, & Handler, 2008; Raskin, Kircher, Honts, & Horowitz, 1988). The basic premise underlying the interpretations of EDRs is that the magnitude of response is commensurate with the degree of psychological importance that the examinee imparts to each stimulus question during testing. Peterson (1907), a student of the famous psychologist Carl Jung wrote: "It is like fishing in a sea of the unconscious, and the fish that likes the bait best jumps to the hook...Every stimulus accompanied by an emotion produced a deviation of the galvanometer to a degree of direct proportion to the liveliness and actuality of the emotion aroused" (p. 805).
Citation Information
Mark Handler, Raymond Nelson, Donald Krapohl and Charles R. Honts. "An EDA Primer for Polygraph Examiners" Polygraph (2010)
Available at: http://works.bepress.com/charles_honts/12/