Cognitive, Linguistic, and Psychological Sciences, Carney Institute for Brain Science, Brown University, Providence, RI, USA.
Nat Commun. 2019 Oct 29;10(1):4926. doi: 10.1038/s41467-019-12931-x.
When choosing between options, whether menu items or career paths, we can evaluate how rewarding each one will be, or how congruent it is with our current choice goal (e.g., to point out the best option or the worst one.). Past decision-making research interpreted findings through the former lens, but in these experiments the most rewarding option was always most congruent with the task goal (choosing the best option). It is therefore unclear to what extent expected reward vs. goal congruency can account for choice value findings. To deconfound these two variables, we performed three behavioral studies and an fMRI study in which the task goal varied between identifying the best vs. the worst option. Contrary to prevailing accounts, we find that goal congruency dominates choice behavior and neural activity. We separately identify dissociable signals of expected reward. Our findings call for a reinterpretation of previous research on value-based choice.
在选项之间进行选择时,无论是菜单项还是职业道路,我们可以评估每个选项的回报程度,或者它与我们当前的选择目标有多么一致(例如,指出最佳选项或最差选项)。过去的决策研究通过前者的视角来解释发现,但在这些实验中,最有回报的选项总是与任务目标最一致(选择最佳选项)。因此,对于预期回报与目标一致性在多大程度上可以解释选择价值的发现,还不清楚。为了消除这两个变量的混淆,我们进行了三项行为研究和一项 fMRI 研究,其中任务目标在识别最佳选项和最差选项之间变化。与流行的观点相反,我们发现目标一致性主导着选择行为和神经活动。我们分别识别出预期回报的可分离信号。我们的研究结果要求对基于价值的选择的先前研究进行重新解释。