Platt J R, Kuch D O, Bitgood S C
J Exp Anal Behav. 1973 Mar;19(2):239-50. doi: 10.1901/jeab.1973.19-239.
Hungry rats received food following lever-press durations exceeding a minimum value, which ranged from 0 to 6.4 sec. When no intertrial intervals separated successive presses, modal press durations remained at very short values as the minimum value required for food was increased. This was particularly true immediately after a food presentation. When an 8-sec intertrial interval followed each lever release, modal press durations were always at or beyond the minimum value required for food, and outcome of the preceding press had no effect on press duration. Possible reasons for the effects of intertrial intervals included punishment of short presses, increased delay of reinforcement of short presses, and reduced density of reinforcement. In addition, functions relating discrete-trials lever-press duration to minimum duration required for food were found to be qualitatively and quantitatively similar to the power functions recently proposed by Catania (1970) for interresponse time and response latency. This similarity was taken as support for a general psychophysical law of temporal judgments.
饥饿的大鼠在压杆持续时间超过最小值后会获得食物，该最小值范围为0至6.4秒。当连续按压之间没有试次间隔时，随着获得食物所需的最小值增加，典型的按压持续时间仍保持在非常短的值。在食物呈现后立即尤其如此。当每次杠杆释放后有一个8秒的试次间隔时，典型的按压持续时间总是等于或超过获得食物所需的最小值，并且前一次按压的结果对按压持续时间没有影响。试次间隔产生影响的可能原因包括对短按压的惩罚、短按压强化延迟的增加以及强化密度的降低。此外，发现将离散试次的压杆持续时间与获得食物所需的最短持续时间相关的函数在定性和定量上与卡塔尼亚（1970年）最近提出的关于反应间隔时间和反应潜伏期的幂函数相似。这种相似性被视为对时间判断的一般心理物理学定律的支持。
