时间辨别动力学：II. 多个脉冲的影响。
Dynamics of time discrimination: II. The effects of multiple impulses.
作者信息
Higa J J
机构信息
Department of Psychology, Experimental, Duke University, Durham, North Carolina 27708-0086, USA.
出版信息
J Exp Anal Behav. 1996 Jul;66(1):117-34. doi: 10.1901/jeab.1996.66-117.
According to a diffusion generalization model, time discrimination is determined by the frequency and recency of preceding intervals of time. A procedure for studying rapid timing was used to investigate whether pigeons' wait-time responses were sensitive to these factors. In Experiment 1 the number (two or eight) and spacing (consecutive or far apart) of 5-s interfood intervals (called impulses) intercalated in a series of 15-s interfood intervals (nonimpulses) were studied. Experiment 2 was identical to the first but the interfood intervals were increased by a factor of three. Overall, impulses shortened wait times in the next interfood interval. However, several impulses occurring in succession extended the localized effect of an impulse: Wait times following a set of eight-close impulses were slow to recover to preimpulse levels. The results show that linear waiting is only an approximation to the dynamic process, and a process that is sensitive to events in an animal's remote past, such as the diffusion generalization model, provides a better account of rapid timing effects.
根据一个扩散泛化模型，时间辨别是由先前时间间隔的频率和新近度决定的。一种用于研究快速计时的程序被用来探究鸽子的等待时间反应是否对这些因素敏感。在实验1中，研究了插入在一系列15秒食物间隔（非脉冲）中的5秒食物间隔（称为脉冲）的数量（两个或八个）和间隔（连续或间隔很远）。实验2与第一个实验相同，但食物间隔增加了两倍。总体而言，脉冲缩短了下一个食物间隔中的等待时间。然而，连续出现的几个脉冲延长了一个脉冲的局部效应：一组八个紧密脉冲后的等待时间恢复到脉冲前水平的速度较慢。结果表明，线性等待只是对动态过程的一种近似，而一个对动物遥远过去的事件敏感的过程，如扩散泛化模型，能更好地解释快速计时效应。
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