The behavioral and neural effect of emotional primes on intertemporal decisions.
The behavioral and neural effect of emotional primes on intertemporal decisions.
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DOI：
10.1093/scan/nss132
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发表时间：
2014-03
影响因子：
4.2
通讯作者：
S. Luo;G. Ainslie;J. Monterosso
中科院分区：
文献类型：
--
作者：
S. Luo;G. Ainslie;J. Monterosso
跨期行为的研究强调特质样方差。然而，最近的研究已经开始探讨影响跨期偏好的情境因素。在这项研究中，我们研究了情绪启动与跨期决策过程中的行为和大脑功能之间的关系。22名参与者完成了一项双重任务，他们被要求在记忆中保持一张表情丰富的面孔的同时做出跨期选择。从试验到试验，面部表情在三个选项之间变化：（i）恐惧，（ii）快乐和（iii）中性。使用功能磁共振成像记录了16名参与者的大脑活动。行为数据表明，恐惧（相对于快乐）的面孔与更大的偏好，但后来的奖励。在观察恐惧面孔时，在右侧背外侧前额叶皮层观察到更大的信号变化。在随后的决策过程中，恐惧启动与包括前扣带皮层后区在内的结构中更大的信号增加有关。在这种活动的个体差异与行为的启动效应的大小。这些发现表明，偶然情绪影响跨期选择。恐惧启动后远视的增加可以用“抑制溢出”效应来解释。
Research on intertemporal behavior has emphasized trait-like variance. However, recent studies have begun to explore situational factors that affect intertemporal preference. In this study, we examined the associations between emotional primes and both behavior and brain function during intertemporal decision making. Twenty-two participants completed a dual task in which they were required to make intertemporal choices while holding an expressive face in memory. From trial-to-trial, the facial expression varied between three alternatives: (i) fearful, (ii) happy and (iii) neutral. Brain activity was recorded using functional magnetic resonance imaging for 16 participants. Behavioral data indicated that fearful (relative to happy) faces were associated with greater preference for larger but later rewards. During observation of fearful faces, greater signal change was observed in the right dorsolateral prefrontal cortex. During subsequent decision making, the fear prime was associated with greater signal increase in structures including the posterior sector of the anterior cingulate cortex. Individual differences in this activity correlated with the magnitude of the priming effect on behavior. These findings suggest that incidental emotions affect intertemporal choice. Increased farsightedness after the fear prime may be explained by an 'inhibition spillover' effect.