Rapid electrophysiological brain responses are influenced by both valence and magnitude of monetary rewards.
Rapid electrophysiological brain responses are influenced by both valence and magnitude of monetary rewards.
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DOI：
10.1162/jocn.2008.20134
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发表时间：
2008-11
影响因子：
3.2
通讯作者：
Huettel SA
中科院分区：
文献类型：
--
作者：
Goyer JP;Woldorff MG;Huettel SA
负面结果，无论是自我识别的还是反馈产生的，都会导致内侧额叶电极部位的事件相关电位 (ERP) 波形出现短延迟负偏转。这种大脑反应被认为是一种“与错误相关的消极性”，代表着对表现的粗略评估；在金钱赌博任务中，它被认为表示所选结果的效价。然而，在这种反馈情况下，除了经验效价之外的其他信息可能对于行为的适应性控制至关重要。在这里，我们使用了一项赌博任务，其中受试者在两个选项之间进行选择，这两个选项的结果效价（收益或损失）和结果大小（更大或更小）都可能有所不同。我们测量了与结果呈现相关的大脑 ERP 反应的变化。我们发现，如之前的研究所示，所选结果的效价对额叶 ERP 具有早期影响，在约 250 毫秒时达到峰值。然而，我们的结果表明，早期 ERP 对结果反馈的反应不仅是由效价驱动的，而且是由所选和未选选项的效价和大小的组合驱动的。从更早的时间开始，大约 150 毫秒，对高后果结果的反应显示出比那些涉及低后果结果的反应更大、分布更集中的积极潜力，与效价无关。此外，这些早期效应的幅度受到先前试验结果顺序的显着调节。这些结果表明，对反馈的早期评估不仅仅是效价的简单识别，它涉及多种因素的考虑，包括结果的大小、未选择选项的背景和先前的历史。
Negative outcomes, whether self-identified or resulting from feedback, cause a short-latency negative deflection in the event-related-potential (ERP) waveform over medial frontal electrode sites. This brain response is considered a type of “error related negativity” representing a coarse evaluation of performance; within monetary gambling tasks, it has been postulated to signal the valence of the chosen outcome. Yet, under such feedback circumstances, other information besides experienced valence may be critical for the adaptive control of behavior. Here, we used a gambling task in which subjects chose between two options that could vary in both outcome valence (gain or loss) and outcome magnitude (larger or smaller). We measured changes in brain ERP responses associated with the presentation of the outcomes. We found, as shown in prior studies, that valence of the chosen outcome has an early effect upon frontal ERPs, peaking at ~250 ms. However, our results demonstrated that the early ERP responses to outcome feedback were driven not just by valence, but by the combination of valence and magnitude for both chosen and unchosen options. Beginning even earlier, at around 150 ms, responses to high-consequence outcomes showed a greater, more centrally distributed, positive potential than those involving low-consequence outcomes, independent of valence. Furthermore, the amplitude of these early effects was significantly modulated by the sequence of outcomes in previous trials. These results indicate that early evaluation of feedback goes beyond simple identification of valence – it involves the consideration of multiple factors, including outcome magnitude, context of unchosen options, and prior history.
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影响因子：
56.9
作者：
Gehring, WJ;Willoughby, AR
通讯作者：
Willoughby, AR
影响因子：
25
作者：
Huettel, SA;Mack, PB;McCarthy, G
通讯作者：
McCarthy, G
影响因子：
8.2
作者：
GEHRING, WJ;GOSS, B;DONCHIN, E
通讯作者：
DONCHIN, E
影响因子：
8.2
作者：
Gehring, WJ;Himle, J;Nisenson, LG
通讯作者：
Nisenson, LG
影响因子：
3.2
作者：
Miltner, WHR;Braun, CH;Coles, MGH
通讯作者：
Coles, MGH