Yi Richard, Landes Reid D, Bickel Warren K
University of Arkansas for Medical Sciences.
J Neurosci Psychol Econ. 2009 Nov 1;2(2):102. doi: 10.1037/a0017571.
Temporal discounting refers to the reduction in the present subjective value of an outcome as a function of the temporal distance to that outcome. Though a number of mathematical models have been proposed to describe this time/value relationship, this search has largely excluded insights from the literature on memory decay. This study examines the utility of memory decay models by comparing the fits of four of these models to fits from established temporal discounting models using past and future temporal discounting data. These results (1) suggest that a single model describes valuation of both future and past outcomes, (2) indicate the exponential-power model, from memory decay literature, is statistically superior in fitting discounting data from both past and future outcomes, and (3) support the advancing perspective of the psychological interconnectedness of the future and past.
时间折扣是指结果的当前主观价值随着与该结果的时间距离的增加而降低。尽管已经提出了许多数学模型来描述这种时间/价值关系，但这一探索在很大程度上排除了记忆衰退文献中的见解。本研究通过比较其中四个模型与使用过去和未来时间折扣数据的既定时间折扣模型的拟合度，检验了记忆衰退模型的效用。这些结果（1）表明一个单一模型可以描述对未来和过去结果的估值，（2）指出记忆衰退文献中的指数幂模型在拟合过去和未来结果的折扣数据方面在统计上更具优势，并且（3）支持未来与过去心理相互联系的进步观点。
