Effect of a stimulus intervening between CS and US in autoshaping.
Effect of a stimulus intervening between CS and US in autoshaping.
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干预 CS 和 US 之间的刺激对自动塑造的影响。
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
R. Rescorla
中科院分区：
文献类型：
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作者：
R. Rescorla
五个实验探索了在鸽子受试者的自动成形准备中，在关键灯光CS终止和食物US开始之间放置刺激的效果。无论刺激本身是关键光唤起啄食，还是未能唤起啄食的听觉事件，它都促进了对关键光CS的表现。受试者内部设计的使用使得背景线索和刺激概括的不同条件不太可能解释。实验3发现，干扰刺激的消退并不能消除促进效应。实验4发现，将CS与食物和干预刺激配对不会产生这种效果，除非两者都发生在同一试验中。总而言之，这些实验排除了干预刺激对CS的二级条件作用的解释。实验5在二阶条件反射设计中使用了一个中间刺激，以证明刺激的作用是改善CS和增强剂之间的联系。这项实验发现，介入性刺激使对CS的反应更容易受到其增强剂随后消失的影响。总之，这些实验证明了干预刺激对CS-增强剂联系的一种催化作用。
Five experiments explored the effect of placing a stimulus between the termination of a key light CS and the onset of a food US in an autoshaping preparation with pigeon subjects. Whether that stimulus was itself a key light evoking pecking or an auditory event failing to evoke pecking, it facilitated performance to the key light CS. The use of a within-subjects design made differential conditioning of background cues and stimulus generalization unlikely accounts. Experiment 3 found that extinction of the intervening stimulus did not remove the facilitative effect. Experiment 4 found that pairing the CS with food and the intervening stimulus did not produce the effect unless both occurred on the same trial. Together, these experiments rule out an account in terms of second-order conditioning of the CS by the intervening stimulus. Experiment 5 used an intervening stimulus in a second-order conditioning design to demonstrate that the stimulus acted to improve the association between the CS and the reinforcer. That experiment found the intervening stimulus to make responding to the CS more vulnerable to subsequent extinction of its reinforcer. Together, these experiments document a kind of catalytic effect of the intervening stimulus on the CS-reinforcer association.