Garcia Basile, Lebreton Maël, Bourgeois-Gironde Sacha, Palminteri Stefano
Laboratoire de Neurosciences Cognitives Computationnelles, Département d'Etudes Cognitives, ENS, PSL, INSERM, Paris, France.
Paris School of Economics, Paris, France.
Nat Hum Behav. 2023 Apr;7(4):611-626. doi: 10.1038/s41562-022-01496-3. Epub 2023 Jan 5.
Standard models of decision-making assume each option is associated with subjective value, regardless of whether this value is inferred from experience (experiential) or explicitly instructed probabilistic outcomes (symbolic). In this study, we present results that challenge the assumption of unified representation of experiential and symbolic value. Across nine experiments, we presented participants with hybrid decisions between experiential and symbolic options. Participants' choices exhibited a pattern consistent with a systematic neglect of the experiential values. This normatively irrational decision strategy held after accounting for alternative explanations, and persisted even when it bore an economic cost. Overall, our results demonstrate that experiential and symbolic values are not symmetrically considered in hybrid decisions, suggesting they recruit different representational systems that may be assigned different priority levels in the decision process. These findings challenge the dominant models commonly used in value-based decision-making research.
标准的决策模型假定每个选项都与主观价值相关联，无论该价值是从经验中推断出来的（经验性的）还是明确指示的概率结果（符号性的）。在本研究中，我们展示的结果对经验性和符号性价值统一表征的假设提出了挑战。在九项实验中，我们向参与者呈现了经验性和符号性选项之间的混合决策。参与者的选择呈现出一种模式，与对经验性价值的系统性忽视相一致。在考虑了其他解释之后，这种规范上不合理的决策策略依然存在，甚至在它带来经济成本时仍持续存在。总体而言，我们的结果表明在混合决策中，经验性和符号性价值并未得到对称的考量，这表明它们调用了不同的表征系统，而这些系统在决策过程中可能被赋予了不同的优先级。这些发现挑战了基于价值的决策研究中常用的主流模型。
