title: Effects of value and reward magnitude on feedback negativity and P300.
abstract: Feedback negativity is a negative component of the event-related brain potential observed 250-300 ms after feedback stimuli. The present study investigated the effects of value (correct or incorrect) and reward magnitude (no, small or large) on feedback negativity and P300. Feedback negativity was larger after incorrect feedback than after correct feedback, irrespective of reward magnitude. In contrast, P300 amplitude increased with reward magnitude, irrespective of value. The amplitude of feedback negativity was correlated with a trait score of negative affect and not positive affect, whereas P300 amplitude was correlated with positive affect and not negative affect. These results suggest that value and reward magnitude are processed separately in the brain.
authors.affiliation: Department of Psychosomatic Medicine, Graduate School of Medicine, The University of Tokyo, Japan. atsuchan-tky@umin.ac.jp
authors.forename: Atsushi
authors.initials: A
authors.lastname: Sato
authors.forename: Asako
authors.initials: A
authors.lastname: Yasuda
authors.forename: Hideki
authors.initials: H
authors.lastname: Ohira
authors.forename: Kaori
authors.initials: K
authors.lastname: Miyawaki
authors.forename: Masami
authors.initials: M
authors.lastname: Nishikawa
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kumano
authors.forename: Tomifusa
authors.initials: T
authors.lastname: Kuboki
mesh_terms: D000328:Adult; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D030141:Feedback, Psychological / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009042:Motivation; D012201:Reward