We investigated how base rates affect temporal discrimination. In a temporal bisection task, pigeons learned to choose one key after a short sample and another key after a long sample. When presented with a range of intermediate samples they produced a psychometric function characterized by a bias and a scale parameter. When one of the trained samples was more frequent than the other, only the location parameter changed, with the pigeons biasing their choices toward the key associated with the most frequent sample. We then reproduced the bisection task in a long operant chamber, with choice keys far apart, and tracked the pigeons' motion patterns during the sample. Pigeons learned to approach the short key following sample onset, wait on the "short side" for a few seconds, and then, when the sample continued, depart toward the long key. This time-place curve was affected by sample base rate: The probability of pigeons going directly to the long side after sample onset increased when long samples were more frequent than short samples, indicating a decrease of temporal control. We found no evidence of changes in temporal sensitivity. The results are most consistent with models of timing that take into account biasing effects and competition for stimulus control. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

中文翻译：

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时间二分任务中的基本速率偏差性能。

我们调查了基本费率如何影响时间歧视。在时间二分任务中，鸽子学会了在短样本后选择一个键，在长样本后选择另一个键。当呈现一系列中间样本时，他们产生了一个以偏差和尺度参数为特征的心理测量函数。当训练样本中的一个比另一个更频繁时，只有位置参数发生了变化，鸽子会将他们的选择偏向与最频繁的样本相关联的关键。然后我们在一个长的操作室中重现了二等分任务，选择键相距很远，并在样本期间跟踪鸽子的运动模式。鸽子在样本开始后学会了接近短键，在“短边”等待几秒钟，然后，当样本继续时，朝着长键离开。这条时间-地点曲线受样本基本率的影响：当长样本比短样本更频繁时，样本开始后鸽子直接进入长边的概率增加，表明时间控制的减少。我们没有发现时间敏感性发生变化的证据。结果与考虑偏置效应和刺激控制竞争的时间模型最一致。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。结果与考虑偏置效应和刺激控制竞争的时间模型最一致。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。结果与考虑偏置效应和刺激控制竞争的时间模型最一致。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。