Intertemporal choice as discounted value accumulation.
Intertemporal choice as discounted value accumulation.
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DOI：
10.1371/journal.pone.0090138
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
McClure SM
中科院分区：
文献类型：
--
作者：
Rodriguez CA;Turner BM;McClure SM
在不同时间点的奖励中进行选择涉及两个独立的认知过程。第一种是时间折扣，它包括结合有关预期奖励的大小和延迟的信息来表示主观价值。第二种方法是比较可获得的奖励，以便在这些主观价值的基础上做出最终选择。虽然已经开发了几个时间贴现的数学模型，但奖励选择过程在很大程度上尚未被探索。为了解决这一限制，我们评估了线性弹道累加器（LBA）模型作为跨期选择过程理论的适用性。LBA模型将选择过程形式化为一个顺序抽样算法，在该算法中，关于不同选择选项的信息被集成，直到达到决策标准。通过比较不同版本的LBA模型，我们发现LBA过程能够很好地捕捉跨期选择的结果和反应时间。从LBA模型推导出的选择结果和反应时间之间的关系不能仅仅用时间折现来解释。此外，在最佳拟合LBA模型中，驱动证据积累的漂移率与来自各种时间贴现模型的独立估计的主观值有关。这些发现为预测跨期选择奖励选择过程中选择相关活动的动态提供了定量框架，并将跨期选择与应用LBA模型的其他类型的决策联系起来。
Two separate cognitive processes are involved in choosing between rewards available at different points in time. The first is temporal discounting, which consists of combining information about the size and delay of prospective rewards to represent subjective values. The second involves a comparison of available rewards to enable an eventual choice on the basis of these subjective values. While several mathematical models of temporal discounting have been developed, the reward selection process has been largely unexplored. To address this limitation, we evaluated the applicability of the Linear Ballistic Accumulator (LBA) model as a theory of the selection process in intertemporal choice. The LBA model formalizes the selection process as a sequential sampling algorithm in which information about different choice options is integrated until a decision criterion is reached. We compared several versions of the LBA model to demonstrate that choice outcomes and response times in intertemporal choice are well captured by the LBA process. The relationship between choice outcomes and response times that derives from the LBA model cannot be explained by temporal discounting alone. Moreover, the drift rates that drive evidence accumulation in the best-fitting LBA model are related to independently estimated subjective values derived from various temporal discounting models. These findings provide a quantitative framework for predicting dynamics of choice-related activity during the reward selection process in intertemporal choice and link intertemporal choice to other classes of decisions in which the LBA model has been applied.
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DOI：
10.1073/pnas.1304429110
发表时间：
2013-10-01
影响因子：
11.1
作者：
Towal, R. Blythe;Mormann, Milica;Koch, Christof
通讯作者：
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影响因子：
16.2
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影响因子：
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影响因子：
2.5
作者：
Shiffrin, Richard M.;Lee, Michael D.;Wagenmakers, Eric-Jan
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Wagenmakers, Eric-Jan
DOI：
10.1073/pnas.0805903105
发表时间：
2008-11-11
影响因子：
11.1
作者：
Forstmann, Birte U.;Dutilh, Gilles;Wagenmaker, Eric-Jan
通讯作者：
Wagenmaker, Eric-Jan