Ramachandran R, Pearce J M
J Exp Psychol Anim Behav Process. 1987 Apr;13(2):182-92.
In four experiments we examined the effect of an irrelevant drive on classical conditioning with food and water. In the first experiment the irrelevant drive weakened the conditioned response in extinction. In Experiments 2 and 3, this suppressive effect was found also in acquisition. Furthermore, the presence of an irrelevant drive during nonreinforced presentations of the conditioned stimulus was found to protect the conditioned response from extinction. Experiment 4 showed that the depressive effect of the irrelevant drive is manifested only when the relevant drive is present. Taken together, these results suggest that an irrelevant drive can influence conditioned responding by modulating the representation of the unconditioned stimulus.
在四项实验中，我们研究了一种无关驱力对食物和水经典条件作用的影响。在第一个实验中，无关驱力削弱了消退中的条件反应。在实验2和3中，这种抑制作用在习得过程中也被发现。此外，在条件刺激非强化呈现期间存在无关驱力，可保护条件反应不被消退。实验4表明，无关驱力的抑制作用仅在存在相关驱力时才会表现出来。综合来看，这些结果表明，无关驱力可通过调节无条件刺激的表征来影响条件反应。
