title: P300 amplitude at Pz and N200/N300 latency at F3 differ between participants simulating suspect versus witness roles in a mock crime.
abstract: Based on the autonomic nervous system (ANS) study by klein Selle, Verschuere, Kindt, Meijer, & Ben Shakhar (2016), 15 participants pretended to perform a crime shown on a video, which 16 other participants pretended to witness. Both groups then experienced a P300-based Concealed Information Test (CIT) protocol called the complex trial protocol. Both groups showed CIT effects, with a larger probe than irrelevant P300s at Pz. However, this effect was significantly larger in the suspect group. In contrast, only the suspect group showed delayed N200/N300 responses at F3-putative inhibitory signs. This supports the klein Selle et al. (2016) ANS study in that the suspect versus witness role-playing manipulation differentially affected inhibitory (vs. orienting) aspects of the CIT situation. Our results are also consistent with Ambach, Stark, Peper, & Vaitl (2008), who saw the same autonomic response fractionation as klein Selle et al., but using Furedy's differentiation of deception method (Furedy, Davis, & Gurevich, 1988). These similarities are discussed.
authors.affiliation: Psychology Department, Northwestern University, Evanston, Illinois, USA.
authors.forename: J Peter
authors.initials: JP
authors.lastname: Rosenfeld
authors.affiliation: Psychology Department, Northwestern University, Evanston, Illinois, USA.
authors.forename: Ilayda
authors.initials: I
authors.lastname: Ozsan
authors.affiliation: Psychology Department, Northwestern University, Evanston, Illinois, USA.
authors.forename: Anne C
authors.initials: AC
authors.lastname: Ward
mesh_terms: D002540:Cerebral Cortex / Q000502:physiology*; D008192:Deception; D004569:Electroencephalography; D018913:Event-Related Potentials, P300; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D007092:Imagination; D008297:Male
keywords: Arousal inhibition (AI); Complex trial protocol; Concealed Information Test (CIT); N200; N300; Orienting response (OR); P300