期刊
BEHAVIOURAL PROCESSES
卷 86, 期 3, 页码 359-363出版社
ELSEVIER
DOI: 10.1016/j.beproc.2011.01.003
关键词
Motivation; Interval timing; Reward magnitude; Peak procedure; Fixed intervals; Pigeons
资金
- NSERC [38861]
- National Institute of Mental Health [P50 MH062196]
- Air Force Office of Scientific Research [FA9550-07-1-0537]
We investigated the interaction of motivation and timing by manipulating the expected reward magnitude during a peak procedure. Four pigeons were tested with three different reward magnitudes, operationalized as duration of food access. Each stimulus predicted a different reward magnitude on a 5 s fixed-interval schedule. Trials with different reward magnitudes were randomly intermingled in a session. Most pigeons responded less often and started responding later on peak trials when a smaller reward was expected, but showed no differences in response termination or peak times. Reward magnitude was independently corroborated through unreinforced choice trials, when pigeons chose between the three stimuli presented simultaneously. These results contribute to a growing body of evidence that the expected reward magnitude influences the decision to start anticipatory responding in tasks where the reward becomes available after a fixed interval, but does not alter peak times, nor the decision to stop responding on peak trials. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据