Parabolic discounting of monetary rewards by physical effort
Parabolic discounting of monetary rewards by physical effort
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DOI：
10.1016/j.beproc.2013.09.014
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发表时间：
2013-11-01
影响因子：
1.3
通讯作者：
Kaiser, Stefan
中科院分区：
文献类型：
--
作者：
Hartmann, Matthias N.;Hager, Oliver M.;Kaiser, Stefan
当人类和其他动物在自然环境中做出决定时，必须权衡预期回报和成本。众所周知，成本的增加会导致奖励的贬值或折扣。虽然我们对时间和概率成本的折扣函数的知识相当先进，但对体力劳动的折扣回报知之甚少。在本研究中，我们比较了一个二元选择任务中的三种不同模型：线性模型、双曲线模型和抛物线模型。在这个二元选择任务中，人类参与者必须紧握一个手柄来获得金钱奖励。在群体和个人层面上，凹抛物线模型解释了选择数据的大部分方差，从而与典型的奖励价值延迟双曲折现形成对比。努力折现的研究不仅对基础科学具有重要意义，而且具有量化神经精神疾病异常动机状态的潜力。(C) 2013 Elsevier B.V.版权所有
When humans and other animals make decisions in their natural environments prospective rewards have to be weighed against costs. It is well established that increasing costs lead to devaluation or discounting of reward. While our knowledge about discount functions for time and probability costs is quite advanced, little is known about how physical effort discounts reward. In the present study we compared three different models in a binary choice task in which human participants had to squeeze a handgrip to earn monetary rewards: a linear, a hyperbolic, and a parabolic model. On the group as well as the individual level, the concave parabolic model explained most variance of the choice data, thus contrasting with the typical hyperbolic discounting of reward value by delay. Research on effort discounting is not only important to basic science but also holds the potential to quantify aberrant motivational states in neuropsychiatric disorders. (C) 2013 Elsevier B.V. All rights reserved.