Neural dynamics underlying the illusion of control during reward processing.

Ya Zheng, Canming Yang, Huiping Jiang, Bo Gao
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Abstract

The illusion of control refers to a behavioral bias in which people believe they have greater control over completely stochastic events than they actually do, leading to an inflated estimate of reward probability than objective probability warrants. In this study, we examined how reward system is modulated by the illusion of control through the lens of neural dynamics. Participants in a behavioral task exhibited a classical illusion of control, assigning a higher value to the gambling wheels they picked themselves than to those given randomly. An event-related potential study of the same task revealed that this behavioral bias is associated with reduced reward anticipation, as indexed by the stimulus-preceding negativity, diminished positive prediction error signals, as reflected by the reward positivity, and enhanced motivational salience, as revealed by the P300. Our findings offer a mechanistic understanding of the illusion of control in terms of reward dynamics.

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奖赏处理过程中控制幻觉的神经动力学基础
控制错觉指的是一种行为偏差,即人们认为自己对完全随机事件的控制能力大于实际控制能力,从而导致对奖励概率的估计高于客观概率。在这项研究中,我们从神经动力学的角度研究了控制幻觉是如何调节奖赏系统的。参与者在一项行为任务中表现出一种经典的控制错觉,他们会给自己挑选的赌盘赋予比随机给出的赌盘更高的价值。对同一任务进行的事件相关电位研究显示,这种行为偏差与刺激前负性所反映的奖励预期降低、奖励正性所反映的积极预测错误信号减弱以及 P300 所显示的动机显著性增强有关。我们的研究结果从奖励动态的角度提供了对控制幻觉的机制性理解。
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