The P300 and reward valence, magnitude, and expectancy in outcome   evaluation

doi:10.1016/j.brainres.2009.06.032

CORC > 北京大学 > 心理与认知科学学院

	The P300 and reward valence, magnitude, and expectancy in outcome evaluation
	Wu, Yan ; Zhou, Xiaolin
刊名	脑研究
	2009
关键词	ERP P300 FRN Outcome evaluation Reward valence Magnitude expectancy Reward magnitude FEEDBACK-RELATED NEGATIVITY MEDIAL FRONTAL-CORTEX BRAIN POTENTIALS GAMBLING TASK ELECTROPHYSIOLOGICAL RESPONSES BAD OUTCOMES PREDICTION DISCRIMINATION INFORMATION DECISIONS
DOI	10.1016/j.brainres.2009.06.032
英文摘要	The P300 in event-related potentials (ERPs) has been implicated in outcome evaluation and reward processing, but it is controversial as to what aspects of reward processing it is sensitive. This study manipulated orthogonally reward valence, reward magnitude, and expectancy towards reward magnitude in a monetary gambling task and observed both the valence and the magnitude effects on the P300, but only when the amount of reward was expected on the basis of a previous cue. The FRN (feedback-related negativity), defined as the mean amplitudes of ERP responses to the loss or the gain outcome in the 250-350 ms time window post-onset of feedback, was found to be sensitive not only to reward valence, but also to expectancy towards reward magnitude and reward magnitude, with the violation of expectancy and the small magnitude eliciting more negative-going FRN. These findings demonstrate that while the FRN may function as a general mechanism that evaluates whether the outcome is consistent or inconsistent with expectation, the P300 is sensitive to a later, top-down controlled process of outcome evaluation, into which factors related to the allocation of attentional resources, including reward valence, reward magnitude, and magnitude expectancy, come to play. (C) 2009 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000269378000014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Neurosciences; SCI(E); SSCI; 171; ARTICLE; 114-122; 1286
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/245908]
专题	心理与认知科学学院
推荐引用方式 GB/T 7714	Wu, Yan,Zhou, Xiaolin. The P300 and reward valence, magnitude, and expectancy in outcome evaluation[J]. 脑研究,2009.
APA	Wu, Yan,&Zhou, Xiaolin.(2009).The P300 and reward valence, magnitude, and expectancy in outcome evaluation.脑研究.
MLA	Wu, Yan,et al."The P300 and reward valence, magnitude, and expectancy in outcome evaluation".脑研究 (2009).