Kehoe E J, Napier R M
School of Psychology, University of New South Wales, Kensington, Australia.
Q J Exp Psychol B. 1991 Aug;43(3):257-77.
Since Pavlov, theories of conditioning have assumed that CR evocation is governed by a series of internal stimuli generated by the CS. This hypothesis was tested in conditioning of the rabbit's nictitating membrane (NM) response by attempting to manipulate the internal sequence through truncating a delay CS and extending a trace CS on test trials. These perturbations of CS duration produced large deficits in CR likelihood and smaller alterations in the CR's time course. As predicted by many models of conditioning, the onset of the CS appeared to play a large but not exclusive role compared to CS duration and CS offset in both evocation and timing of the CR. The results are discussed with respect to their implications for real-time models of conditioning.
自巴甫洛夫以来，条件作用理论一直假定条件反应（CR）的唤起受条件刺激（CS）产生的一系列内部刺激所支配。通过在测试试验中截断延迟CS并延长痕迹CS来尝试操纵内部序列，从而在兔瞬膜（NM）反应的条件作用中对这一假设进行了检验。CS持续时间的这些扰动在CR可能性上产生了很大的缺陷，并且在CR的时间进程上产生了较小的变化。正如许多条件作用模型所预测的那样，与CS持续时间和CS终止相比，CS的开始在CR的唤起和定时方面似乎起着很大但并非唯一的作用。讨论了这些结果对条件作用实时模型的意义。
