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

Beyond valence and magnitude: a flexible evaluative coding system in the brain.
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超越价和量:大脑中灵活的评估编码系统

DOI:
10.1016/j.neuropsychologia.2011.10.006
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发表时间:
2011-12
期刊:
影响因子:
2.6
通讯作者:
Luo YJ
Luo YJ
中科院分区:
心理学3区
文献类型:
--
作者:
Gu R;Lei Z;Broster L;Wu T;Jiang Y;Luo YJ

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结果评价是一种认知过程,在我们的日常生活中扮演着重要的角色。在实验心理学领域使用的大多数范式中,结果效价和结果大小是研究的两个主要特征。经典的独立编码模型认为,结果效价和结果大小是通过独立的神经机制来评估的,这些神经机制可以映射到离散的事件相关电位(ERP)成分:反馈相关负波(FRN)和P3。为了检验这一模型,我们按顺序而不是同时给出了结果效价和大小。结果表明,当只有结果价或大小已知时,FRN和P3都编码了结果特征;当结果的两个方面都已知时,两个成分的认知功能分离:FRN对当前语境中可获得的信息做出反应,而P3模式取决于结果呈现顺序。目前的研究表明,部分由FRN和P3索引的人类评估系统比以前的理论所建议的更灵活。
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” suggest 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.
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