Brain potentials associated with expected and unexpected good and bad outcomes
Brain potentials associated with expected and unexpected good and bad outcomes
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DOI：
10.1111/j.1469-8986.2005.00278.x
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发表时间：
2005-03-01
期刊：
影响因子：
3.7
通讯作者：
Simons, RF
中科院分区：
文献类型：
--
作者：
Hajcak, G;Holroyd, CB;Simons, RF
错误相关负波（error-related negativity，ERN）是一种事件相关的脑电位，当受试者收到指示错误或金钱损失的反馈时观察到。有证据表明，ERN是更大的意想不到的负面反馈。P300也被证明是增强意外的反馈，但似乎并不敏感的反馈价。本研究评估的作用，期望ERN和P300在两个实验中操纵的概率负反馈（25%，50%，或75%）在一个试验的基础上，在实验1，并通过改变频率的正反馈和负反馈的试验在实验2。在这两个实验中，P300振幅较大的意外反馈，然而，ERN是同样大的预期和意外的负反馈。这些结果进行了讨论的潜在作用的期望在处理错误和负反馈。
The error-related negativity (ERN) is an event-related brain potential observed when subjects receive feedback indicating errors or monetary losses. Evidence suggests that the ERN is larger for unexpected negative feedback. The P300 has also been shown to be enhanced for unexpected feedback, but does not appear to be sensitive to feedback valence. The present study evaluated the role of expectations on the ERN and P300 in two experiments that manipulated the probability of negative feedback (25%, 50%, or 75%) on a trial-by-trial basis in experiment 1, and by varying the frequency of positive and negative feedback across blocks of trials in experiment 2. In both experiments, P300 amplitude was larger for unexpected feedback; however, the ERN was equally large for expected and unexpected negative feedback. These results are discussed in terms of the potential role of expectations in processing errors and negative feedback.