Striatal sensitivity to personal responsibility in a regret-based decision-making task
Striatal sensitivity to personal responsibility in a regret-based decision-making task
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DOI：
10.3758/cabn.10.4.460
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发表时间：
2010-12-01
影响因子：
2.9
通讯作者：
Clark, L.
中科院分区：
文献类型：
--
作者：
Camille, N.;Pironti, V. A.;Clark, L.
后悔和宽慰是一种复杂的情绪状态，与决策情境中对未获得的结果进行反事实加工有关。在“演员效应”中，一种代理感和个人责任感被认为会加剧这些情绪。使用功能磁共振成像，我们扫描了22名志愿者，他们在玩一项涉及在两次幸运轮赌博中做出选择的任务时。我们研究了神经对反事实结果的反应是如何通过给受试者改变主意的机会来调节的，作为对个人责任的操纵。对结果的满意度对获得的和未获得的结果之间的差异高度敏感，在有机会改变主意的试验中，损失后的满意度较低。纹状体和眶前叶皮质的结果相关活动与满意度呈正相关。纹状体反应受机构操纵的调节：在失败之后，当受试者有机会改变主意时，纹状体信号显著降低。这些结果支持额纹状体机制参与反事实思维，并突出了纹状体对个人责任的影响的敏感性。
Regret and relief are complex emotional states associated with the counterfactual processing of nonobtained outcomes in a decision-making situation. In the "actor effect," a sense of agency and personal responsibility is thought to heighten these emotions. Using fMRI, we scanned volunteers (n = 22) as they played a task involving choices between two wheel-of-fortune gambles. We examined how neural responses to counterfactual outcomes were modulated by giving subjects the opportunity to change their minds, as a manipulation of personal responsibility. Satisfaction ratings to the outcomes were highly sensitive to the difference between the obtained and nonobtained outcome, and ratings following losses were lower on trials with the opportunity to change one's mind. Outcome-related activity in the striatum and orbitofrontal cortex was positively related to the satisfaction ratings. The striatal response was modulated by the agency manipulation: Following losses, the striatal signal was significantly lower when the subject had the opportunity to change his/her mind. These results support the involvement of frontostriatal mechanisms in counterfactual thinking and highlight the sensitivity of the striatum to the effects of personal responsibility.