A temporal limit on the effect of future food on current performance in an analogue of foraging and welfare.
A temporal limit on the effect of future food on current performance in an analogue of foraging and welfare.
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DOI：
10.1901/jeab.1984.41-117
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发表时间：
1984-03
影响因子：
2.7
通讯作者：
W. Timberlake
中科院分区：
文献类型：
--
作者：
W. Timberlake
大鼠在每24小时内获得两次食物。第一次会议是一次工作会议，按照递增比率时间表提供食物。在第二次会议期间，在工作会议后1至23小时之间，每24小时可免费获得固定总摄入量的食物。这种情况类似于几个现实世界的情况，包括在继续在快速耗尽的土地上觅食还是等待更好的土地，以及现在工作和以后获得有保障的收入之间的选择。这项实验的目的是探索未来获得奖励可能会影响当前反应的时间段。与最近的理论可能预期的相反，对未来食物的预期在工作会议开始后推迟一个小时或更长时间，对当前的表现没有影响。在工作期间，食物摄入量很高且稳定，但在第二天的工作会议之前，自由会议出现了预喂食效应。此外，工作时间表的难度增加增加了工作量和食品的最高支付价格，好像工作会议是唯一可以获得食品的时间。结果表明，在要求动物随着时间整合投入以确定资源在备选方案中的分配的理论中考虑时间限制的重要性。
Rats obtained access to food twice each 24-hour period. The first session was a work session in which food was available on a progressive-ratio schedule. During the second session, which occurred between 1 and 23 hours after the work session, food was freely available up to a fixed total intake each 24 hours. The situation resembled elements of several real world circumstances, including the choice between continuing to forage in a rapidly depleting patch and waiting for a better patch, and between working now and receiving a guaranteed income later. The purpose of the experiment was to explore the time period over which future access to reward could affect current responding. Contrary to what might be expected from recent theorizing, anticipation of future food delayed by an hour or more after the start of the work session had no effect on current performance. Food intake was high and constant during work sessions except for a prefeeding effect that occurred when the free session closely preceded the next day's work session. Also, an increase in the difficulty of the work schedule increased the amount of work and the maximum price paid for food as if the work session were the only time food was available. The results indicate the importance of considering temporal limits in theories that require animals to integrate input over time to determine the allocation of resources among alternatives.