Brunner D
Department of Psychiatry, Division of Developmental Psychobiology, New York State Psychiatric Institute, New York, NY 10032, USA.
Behav Processes. 1999 Apr;45(1-3):87-99. doi: 10.1016/s0376-6357(99)00011-x.
Brunner and Gibbon [Brunner, D., Gibbon, J., 1995. Anim. Behav. 50, 1627-1634] studied rats' choices between sequences of equal numbers of rewards that differed in their temporal arrangement. Rats' preferences were well accounted for by a parallel discounting model of aggregate food value in which the sequence value is the simple sum of the hyperbolically discounted value of the individual rewards [Mazur, J.E., 1984. J. Exp. Anal. Behav. 46, 67-77]. Three experiments reported here extend their work to sequences of unequal number of rewards and test the specific prediction that rats prefer sequences that get worse with time over sequences that improve, given that the total reward rate is the same. Choice functions from this and other two experiments that offered choice between unequal reward numbers were S-shaped and supported a signal detection-like model in which the value of each option obeys the parallel discounting model.
布鲁纳和吉本[布鲁纳，D.，吉本，J.，1995年。《动物行为》50卷，第1627 - 1634页]研究了大鼠在数量相等但时间安排不同的奖励序列之间的选择。大鼠的偏好可以通过一个总食物价值的平行折扣模型得到很好的解释，在这个模型中，序列价值是各个奖励的双曲线折扣价值的简单总和[马祖尔，J.E.，1984年。《实验行为分析杂志》46卷，第67 - 77页]。这里报告的三个实验将他们的工作扩展到奖励数量不等的序列，并检验了一个具体预测，即在总奖励率相同的情况下，大鼠更喜欢随着时间推移变差的序列而不是变好的序列。来自这个实验以及另外两个提供不等奖励数量选择的实验的选择函数呈S形，并支持一个类似信号检测的模型，其中每个选项的价值都遵循平行折扣模型。
