title: Behavioral approach and reward processing: results on feedback-related negativity and P3 component.
abstract: This study examined the FRN, the P3, and individual differences in trait-BAS and trait-BIS in the context of reward expectation mismatch. A more negative FRN was predicted for higher vs. lower trait-BAS individuals and for higher vs. lower trait-BIS individuals. In the extinction-learning task, participants (N=102) chose between two response buttons to earn a maximum of points. In the acquisition phase, button 1 was continuously rewarded and button 2 was partially rewarded. In the extinction phase, one button was unexpectedly no longer rewarded. The FRN amplitude was more negative for higher vs. lower trait-BAS individuals and for lower vs. higher trait-BIS individuals within the extinction phase. The P3 was more positive in the extinction compared to the acquisition phase. Our results suggest that higher trait-BAS individuals have a more pronounced reward expectation mismatch.
authors.affiliation: University of Bonn, Institute of Psychology, Kaiser-Karl-Ring 9, 53111 Bonn, Germany. sebastian.lange@uni-bonn.de
authors.forename: Sebastian
authors.initials: S
authors.lastname: Lange
authors.forename: Anja
authors.initials: A
authors.lastname: Leue
authors.forename: André
authors.initials: A
authors.lastname: Beauducel
mesh_terms: D000328:Adult; D000339:Affect / Q000502:physiology; D002540:Cerebral Cortex / Q000502:physiology*; D002755:Choice Behavior / Q000502:physiology*; D004569:Electroencephalography; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D030141:Feedback, Psychological / Q000502:physiology*; D005260:Female; D006801:Humans; D007858:Learning / Q000502:physiology; D008297:Male; D012201:Reward