Liu Yanni, Nelson Lindsay D, Bernat Edward M, Gehring William J
Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA.
Psychophysiology. 2014 Aug;51(8):782-8. doi: 10.1111/psyp.12216. Epub 2014 Mar 28.
A negative deflection in the event-related potential is enhanced following error- and loss-related feedback in decision-making and simple gambling tasks. Researchers have assumed that the perceptual properties of the feedback stimuli are unimportant in explaining these effects. This assumption was tested in the present study through a flanker gambling task, in which the perceptual properties of the feedback were manipulated. Consistent with previous studies, loss elicited a larger feedback-related negativity (FRN) than gain feedback. However, this FRN reward effect was modulated by the perceptual properties of the feedback stimuli. When gain and loss feedback were perceptually similar to each other, the enhancement of the FRN following the loss feedback was smaller compared to when the gain and loss feedback were different from each other. In addition, incongruent feedback elicited a larger FRN than congruent feedback; this FRN congruency effect was larger following gain than loss feedback. These results suggested that perceptual properties of the feedback stimuli play a role in the elicitation of the FRN.
在决策和简单赌博任务中，与错误及损失相关的反馈之后，事件相关电位中的负向偏转增强。研究人员假定，反馈刺激的感知属性在解释这些效应时并不重要。本研究通过一项侧翼赌博任务对这一假设进行了测试，其中反馈的感知属性受到了操控。与之前的研究一致，损失引发的反馈相关负波（FRN）比收益反馈更大。然而，这种FRN奖励效应受到反馈刺激感知属性的调节。当收益和损失反馈在感知上彼此相似时，与收益和损失反馈彼此不同时相比，损失反馈后FRN的增强更小。此外，不一致的反馈比一致的反馈引发更大的FRN；这种FRN一致性效应在收益反馈后比损失反馈后更大。这些结果表明，反馈刺激的感知属性在FRN的诱发中起作用。
