Reward value effects on timing in the peak procedure
Reward value effects on timing in the peak procedure
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DOI：
10.1016/j.lmot.2008.05.004
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发表时间：
2009-05-01
影响因子：
1.4
通讯作者：
Kirkpatrick, Kimberly
中科院分区：
文献类型：
--
作者：
Galtress, Tiffany;Kirkpatrick, Kimberly
三个实验研究了动机变量对峰值过程中时间的影响。在实验1中，大鼠接受了60秒的峰值程序，再加上长期的，相位之间的变化，振幅。在20个训练期内，随着振幅的增加，峰值发生了显著的偏移。在最后阶段，在测试之前，大鼠接受氯化锂诱导的厌恶，并且观察到峰值的100 °位移。实验2证实了在氯化锂贬值下峰的100 °位移，并诱导了与饱腹感贬值相当的位移。的程度的位移既不是加性的，也不是乘法，这表明两个过程可能有贡献。实验3研究了消光对峰值响应的影响，揭示了响应率的下降，但没有证据表明响应的时间发生了任何变化。讨论了结果对当代计时理论的影响。(c)2008年爱思唯尔公司All rights reserved.
Three experiments examined the effect of motivational variables on timing in the peak procedure. In Experiment 1, rats received a 60-s peak procedure that was coupled with long-term, between-phase changes in reinforcer magnitude. Increases in reinforcer magnitude produced a leftward shift in the peak that persisted for 20 sessions of training. in a final phase, the rats received lithium chloride-induced aversion prior to testing and a rightward shift in the peak was observed. Experiment 2 confirmed the rightward shift in the peak under lithium chloride devaluation and induced a comparable shift with satiety devaluation. The degree of rightward shift was neither additive nor multiplicative, suggesting that two processes may have contributed. Experiment 3 examined the effect of extinction on peak responding, revealing a decrease in response rate, but no evidence of any change in the timing of responding. The implications of the results for contemporary timing theories are discussed. (c) 2008 Elsevier Inc. All rights reserved.