Computerized intertemporal choice task in chimpanzees (Pan troglodytes) with/without postreward delay.
Computerized intertemporal choice task in chimpanzees (Pan troglodytes) with/without postreward delay.
复制标题
黑猩猩（Pan troglodytes）的计算机化跨期选择任务，有/没有奖励后延迟。
DOI：
10.1037/com0000254
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发表时间：
2020
影响因子：
1.4
通讯作者：
Hirata Satoshi
中科院分区：
文献类型：
--
作者：
Sato Yutaro;Sakai Yutaka;Hirata Satoshi
在跨期选择(ITC)任务中，动物被呈现在较早获得的较小奖励和稍后获得的较大奖励之间的选择。为了使两个选项的试验持续时间相等，在发放奖励后插入延迟(PRD)。动物需要加入这一点，以增加长期奖励率。然而，最近的研究表明，他们很难理解与PRDS相关的偶然性。以前的研究表明，黑猩猩在ITC任务中表现出特别强的自控力，但目前尚不清楚黑猩猩在考虑PRD时是否会这样做。因此，我们使用触摸屏实验来探索当试验持续时间等于PRD以及当PRD被消除时，黑猩猩的跨期偏好。计算机化的设置被用来试图灵活而精确地控制延迟长度，同时减少与人类实验者交互的影响。此外，触摸屏上使用符号提示呈现了选择选项。这可能会减少看到食物奖励对做出选择的影响(即动物获得更多食物的强烈倾向)。在ITC的一项任务中，试验持续时间相等，4只黑猩猩更喜欢较大的奖励，但当奖励金额的比例较小时，它们更经常选择较小的奖励。在没有PRD的ITC任务中，4只黑猩猩中有2只确实改变了它们的偏好，选择了较小的奖励，并提高了奖励率，尽管这一结果应该根据一些方法限制来解释。
In intertemporal choice (ITC) tasks, animals are presented with alternative choices between a smaller reward that becomes available sooner and a larger reward that becomes available later. To equate the duration of a trial across the 2 options, postreward delays (PRDs) are inserted after the delivery of the reward. Animals need to incorporate this to increase the long-term reward rate. However, recent studies suggest that they have difficulty understanding the contingency associated with PRDs. Previous research indicates that chimpanzees exhibit particularly great self-control in ITC tasks, but it remains unclear whether chimpanzees do so when considering PRDs. Therefore, we used touchscreen experiments to explore chimpanzee intertemporal preferences when trial duration was equated by a PRD as well as when the PRD was eliminated. The computerized setting was used to try to control delay length flexibly and precisely while reducing the impact of the interaction with human experimenters. Moreover, choice options were presented on touchscreens using symbolic cues. This may reduce the impact of seeing food rewards on making a choice (ie, the animals’ robust tendency to reach for the larger amount of food). In an ITC task in which the trial duration was equated, 4 chimpanzees preferred larger rewards but chose smaller rewards more often when the ratio of the reward amount was smaller. In an ITC task with no PRDs, 2 of 4 chimpanzees did switch their preference to smaller rewards and enhanced the reward rate although this result should be interpreted in light of some methodological limitations.(PsycInfo Database Record (c) 2021 APA, all rights reserved)