Moderate Stability among Delay, Probability, and Effort Discounting in Humans.
Moderate Stability among Delay, Probability, and Effort Discounting in Humans.
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DOI：
10.1007/s40732-023-00537-1
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发表时间：
2023-02-15
影响因子：
1.3
通讯作者：
Mitchell, Suzanne H
中科院分区：
文献类型：
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作者：
Escobar, Gisel G;Morales-Chaine, Silvia;Haynes, Jeremy M;Santoyo, Carlos;Mitchell, Suzanne H
延迟折扣在时间上的稳定性已经得到了很好的证明。然而，有限的研究已经检查了概率折扣的稳定性，没有研究的努力折扣的稳定性。本研究评估了延迟，概率和努力折扣任务的稳态特征，随着时间的推移，假设在人类的奖励，以及是否响应特征建议一个共同的折扣方程。参与者完成延迟，概率和努力折扣任务的三个场合。我们发现延迟和概率任务的相对稳定性适中，并且所有任务在时间上的绝对稳定性都有类似的证据。组间相关系数显示了一定的对应性，在时间点和任务，和较高水平的受试者之间的变异性，特别是对努力折扣任务，表明特质水平的变量比状态水平的变量对性能有更强的影响。延迟和概率任务的性能适度相关，类似的数学函数适合这两个任务（双曲线）的选择模式，这表明延迟和概率折扣过程有一些共同的元素。较低的相关性和不同的函数拟合表明，努力折扣涉及更多的独特功能。
The stability of delay discounting across time has been well-established. However, limited research has examined the stability of probability discounting, and no studies of the stability of effort discounting are available. The present study assessed the steady-state characteristics of delay, probability, and effort discounting tasks across time with hypothetical rewards in humans, as well as whether response characteristics suggested a common discounting equation. Participants completed delay, probability, and effort discounting tasks on three occasions. We found moderate relative stability of delay and probability tasks, and similar evidence for absolute stability across time for all tasks. The interclass correlations coefficient showed some correspondence across time points and tasks, and higher levels of between subject variability, especially for the effort discounting task, suggesting trait level variables has a stronger influence on performance than state level variables. Performance on the delay and probability tasks were moderately correlated and similar mathematical functions fit choice patterns on both tasks (hyperbolic), suggesting that delay and probability discounting processes shared some common elements. Lower correlations and different function fits suggested that effort discounting involves more unique features.