Gilbert R M
J Exp Anal Behav. 1971 Jan;15(1):97-108. doi: 10.1901/jeab.1971.15-97.
Four rats were trained to lever press under a discriminated avoidance/escape schedule in which separately signalled safe and warning periods were 100 sec and 32 sec respectively. The auditory and not the visual component of the compound warning signal became associated with the discriminative control of lever pressing. Avoidance behavior also came under temporal control, in that the probability of lever pressing increased as the warning period progressed. Timing began with the onset of the warning signal rather than the offset of the safe signal. However, after the warning signal had been progressively eliminated, timing began with the offset of the safe signal. When neither signal was normally available, the temporal distribution of avoidance behavior changed markedly. Drifts in the temporal distribution of lever pressing occurred throughout the study; these were manipulated for two animals.
训练了四只大鼠，使其在辨别性回避/逃避程序下按压杠杆，其中分别发出信号的安全期和警告期分别为100秒和32秒。复合警告信号的听觉而非视觉成分与杠杆按压的辨别性控制相关联。回避行为也受到时间控制，即随着警告期的推进，杠杆按压的概率增加。计时从警告信号开始时而非安全信号结束时开始。然而，在警告信号逐渐消除后，计时从安全信号结束时开始。当两个信号都正常不可用时，回避行为的时间分布发生了明显变化。在整个研究过程中，杠杆按压的时间分布出现了漂移；对两只动物进行了这种操作。
