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The Event-Related Potentials Responding to Outcome Valence and Expectancy Violation during Feedback Processing
Cerebral Cortex ( IF 3.7 ) Pub Date : 2020-09-30 , DOI: 10.1093/cercor/bhaa274
Yan Gu 1 , Tianliang Liu 1 , Xuemeng Zhang 1 , Quanshan Long 1 , Na Hu 1 , Yi Zhang 2 , Antao Chen 1
Affiliation  

Feedback-related negativity (FRN) is believed to encode reward prediction error (RPE), a term describing whether the outcome is better or worse than expected. However, some studies suggest that it may reflect unsigned prediction error (UPE) instead. Some disagreement remains as to whether FRN is sensitive to the interaction of outcome valence and prediction error (PE) or merely responsive to the absolute size of PE. Moreover, few studies have compared FRN in appetitive and aversive domains to clarify the valence effect or examine PE’s quantitative modulation. To investigate the impact of valence and parametrical PE on FRN, we varied the prediction and feedback magnitudes within a probabilistic learning task in valence (gain and loss domains, Experiment 1) and non-valence contexts (pure digits, Experiment 2). Experiment 3 was identical to Experiment 1 except that some blocks emphasized outcome valence, while others highlighted predictive accuracy. Experiments 1 and 2 revealed a UPE encoder; Experiment 3 found an RPE encoder when valence was emphasized and a UPE encoder when predictive accuracy was highlighted. In this investigation, we demonstrate that FRN is sensitive to outcome valence and expectancy violation, exhibiting a preferential response depending on the dimension that is emphasized.

中文翻译:

反馈处理过程中响应结果效价和期望违反的事件相关电位

反馈相关的消极性 (FRN) 被认为是对奖励预测误差 (RPE) 的编码,这是一个描述结果是比预期好还是差的术语。然而,一些研究表明它可能反映了无符号预测误差 (UPE)。关于 FRN 是否对结果效价和预测误差 (PE) 的相互作用敏感或仅对 PE 的绝对大小敏感,仍然存在一些分歧。此外,很少有研究比较 FRN 在食欲和厌恶领域以阐明价效应或检查 PE 的定量调制。为了研究价和参数 PE 对 FRN 的影响,我们在价(增益和损失域,实验 1)和非价上下文(纯数字,实验 2)中改变概率学习任务中的预测和反馈幅度。
更新日期:2020-09-30
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