Positive priming and intentional binding: Eye-blink rate predicts reward information effects on the sense of agency
Positive priming and intentional binding: Eye-blink rate predicts reward information effects on the sense of agency
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DOI：
10.1080/17470919.2011.590602
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发表时间：
2012-01-01
影响因子：
2
通讯作者：
van Haren, Neeltje E. M.
中科院分区：
文献类型：
--
作者：
Aarts, Henk;Bijleveld, Erik;van Haren, Neeltje E. M.
人类社会深深植根于人们的能动性经验;也就是说，一个人参与自愿行为并导致自己的行为和结果的普遍感觉。奖励和积极情感在控制自愿行为中起着重要作用。然而，积极的奖励信号在代理意义上的作用知之甚少。本研究采用意向约束范式考察了报酬相关信息对代理感的影响。这一范式衡量的是行动及其效果在主观上随着时间的推移而发生变化的程度，反映了人们的能动性意识的一个关键组成部分。结果表明，当被试通过短暂接触正面图片获得奖励相关信息时，意向性约束更强。有趣的是，这种积极的启动效应被基线眨眼率（纹状体多巴胺能功能的间接标志物）所调节;奖励相关信息增加了主要表现出较高基线眨眼率的参与者的有意结合。这些发现表明，在奖励相关信息塑造人们将自己视为代理人的方式的过程中，纹状体多巴胺活动可能发挥了作用。
Human society is strongly rooted in people's experiences of agency; that is, the pervasive feeling that one engages in voluntary behavior and causes one's own actions and resulting outcomes. Rewards and positive affect play an important role in the control of voluntary action. However, the role of positive reward signals in the sense of agency is poorly understood. This study examined effects of reward-related information on the sense of agency by employing the intentional binding paradigm. This paradigm measures the extent to which actions and their effects subjectively shift together across time, reflecting a crucial component of people's sense of agency. Results showed that intentional binding is stronger when participants are primed with reward-related information via brief exposure to positive pictures. Interestingly, this positive priming effect was moderated by baseline eye-blink rates (an indirect marker of striatal dopaminergic functioning); reward-related information increased intentional binding mainly for participants displaying higher baseline eye-blink rates. These findings suggest a possible role for striatal dopamine activity in the process by which reward-related information shapes the way people see themselves as agents.