Rigoli Francesco, Preller Katrin H, Dolan Raymond J
City, University of London, London, UK.
Wellcome Trust Centre for Neuroimaging, University College London, London, UK.
Cogn Affect Behav Neurosci. 2018 Apr;18(2):331-341. doi: 10.3758/s13415-018-0572-x.
In several contexts, such as finance and politics, people make choices that are relevant for others but irrelevant for oneself. Focusing on decision-making under risk, we compared monetary choices made for one's own interest with choices made on behalf of an anonymous individual. Consistent with the previous literature, other-interest choices were characterized by an increased gambling propensity. We also investigated choice stochasticity, which captures how much decisions vary in similar conditions. An aspect related to choice stochasticity is how much decisions are tuned to the option values, and we found that this was higher during self-interest than during other-interest choices. This effect was observed only in individuals who reported a motivation to distribute rewards unequally, suggesting that it may (at least partially) depend on a motivation to make accurate decisions for others. Our results indicate that, during decision-making under risk, choices for other people are characterized by a decreased tuning to the values of the options, in addition to enhanced risk seeking.
在金融和政治等多种情境中，人们会做出对他人有影响但对自己无关紧要的选择。聚焦于风险下的决策，我们将出于自身利益做出的金钱选择与代表匿名个体做出的选择进行了比较。与先前的文献一致，为他人利益做出的选择表现出更高的赌博倾向。我们还研究了选择的随机性，它反映了在相似条件下决策的变化程度。与选择随机性相关的一个方面是决策对选项价值的调整程度，我们发现，在自身利益决策过程中，这种调整程度高于为他人利益决策时。仅在那些表示有动机不平等分配奖励的个体中观察到了这种效应，这表明它可能（至少部分）取决于为他人做出准确决策的动机。我们的结果表明，在风险决策过程中，为他人做出的选择除了表现出更强的风险寻求倾向外，还表现出对选项价值的调整程度降低。
