APPLICATION OF SCALAR TIMING THEORY TO INDIVIDUAL TRIALS
APPLICATION OF SCALAR TIMING THEORY TO INDIVIDUAL TRIALS
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DOI：
10.1037/0097-7403.20.2.135
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发表时间：
1994-04-01
期刊：
影响因子：
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通讯作者：
GIBBON, J
中科院分区：
文献类型：
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作者：
CHURCH, RM;MECK, WH;GIBBON, J
我们的目的是在对单个试验进行分析的基础上，推断出时间泛化行为所涉及的内部时钟、时间记忆和决策过程的特征。将30只大鼠分成三组，每组10只，采用峰值程序进行训练，强化时间分别为15秒、30秒或60秒，同时设置了几种无食物的试验时长。在无食物试验中，平均反应率逐渐增加，在有时会出现强化的时间附近达到最大值，然后逐渐降低。单个试验的特征是一段高反应率时期，前后分别是低反应率时期。高反应率的时间特征（开始、停止、中间和扩散）的测量值之间的协方差模式支持一种平行的、标量计时模型，在该模型中，动物在每次试验中从强化时间的记忆中抽取单个样本，并使用不同的反应阈值来决定何时开始和停止反应。另一种模型，准序列模型（J. 吉本和R. M. 丘奇，1992），与所获得的协方差之间的关系以及在不同无食物信号时长中观察到的标量特性不一致。
Our purpose was to infer the characteristics of the internal clock, temporal memory, and decision processes involved in temporal generalization behavior on the basis of the analysis of individual trials. Three groups of 10 rats each were trained on a peak procedure with reinforcement at 15, 30, or 60 s, with several nonfood trial durations. On nonfood trials, the mean response rate gradually increased to a maximum near the time that reinforcement sometimes occurred and then gradually decreased. Individual trials were characterized by a period of high response rate, preceded and followed by a low response rate. The covariance pattern among measures of the temporal characteristics of the high response rate (start, stop, middle, and spread) supported a parallel, scalar timing model in which animals used on each trial a single sample from memory of the time of reinforcement and separate response thresholds to decide when to start and stop responding. An alternative model, the quasi-serial model (J. Gibbon & R. M. Church, 1992), was not consistent with the obtained relationships between covariances or with the scalar property seen across different nonfood signal durations.