Hall G, Pearce J M
J Exp Psychol Anim Behav Process. 1979 Jan;5(1):31-42.
In each of three experiments rats were trained by the conditioned-emotional-response technique with a conditioned stimulus (CS) predicting a relatively weak shock, the unconditioned stimulus (US). In the second stage of training the intensity of the shock was increased, and it was found that subjects for whom the same CS was used in both stages acquired further suppression less readily than subjects that experiences a new CS in the second stage. The implication of these results for theories of attention and for theories of habituation is discussed. It is suggested that associations formed by the test CS during the first stage of training reduce the readiness of the stimulus to enter into new associations, either because an association between the stimulus and the context reduces further processing of the stimulus or because the association between the test stimulus and the weak shock attenuates the formation of an association with the stronger shock.
在三个实验中的每一个实验里，大鼠都通过条件性情绪反应技术进行训练，使用一个条件刺激（CS）来预测相对较弱的电击，即非条件刺激（US）。在训练的第二阶段，电击强度增加，结果发现，在两个阶段都使用相同CS的实验对象比在第二阶段经历新CS的实验对象更不容易获得进一步的抑制。讨论了这些结果对注意力理论和习惯化理论的意义。有人提出，在训练第一阶段由测试CS形成的关联会降低该刺激形成新关联的准备程度，这要么是因为刺激与情境之间的关联减少了对该刺激的进一步处理，要么是因为测试刺激与弱电击之间的关联削弱了与更强电击形成关联的能力。
