Beyond valence and magnitude: A flexible evaluative coding system in the brain

NEUROPSYCHOLOGIA

卷:49

Article

Gu, Ruolei^1,2  Lei, Zhihui¹  Broster, Lucas²  Wu, Tingting¹  Jiang, Yang²  Luo, Yue-jia^1,3 

[1] Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China

[2] Univ Kentucky, Coll Med, Dept Behav Sci, Lexington, KY 40536 USA

[3] Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China

关键词: Decision-making;    Outcome evaluation;    Outcome valence;    Outcome magnitude;    Event-related potential (ERP);    Feedback-related negativity (FRN);    P3;   

DOI  :  10.1016/j.neuropsychologia.2011.10.006

来源: Elsevier

【 摘 要 】

Outcome evaluation is a cognitive process that plays an important role in our daily lives. In most paradigms utilized in the field of experimental psychology, outcome valence and outcome magnitude are the two major features investigated. The classical independent coding model suggests that outcome valence and outcome magnitude are evaluated by separate neural mechanisms that may be mapped onto discrete event-related potential (ERP) components: feedback-related negativity (FRN) and the P3, respectively. To examine this model, we presented outcome valence and magnitude sequentially rather than simultaneously. The results reveal that when only outcome valence or magnitude is known, both the FRN and the P3 encode that outcome feature; when both aspects of outcome are known, the cognitive functions of the two components dissociate: the FRN responds to the information available in the current context, while the P3 pattern depends on outcome presentation sequence. The current study indicates that the human evaluative system, indexed in part by the FRN and the P3, is more flexible than previous theories suggested. (C) 2011 Elsevier Ltd. All rights reserved.

【 授权许可】

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