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Animal Learning & Behavior, 16, 105–111.Ĭolwill, R. The role of response-reinforcer association increases throughout extended instrumental training. Journal of Experimental Psychology: Animal Behavior Processes, 14, 155–164.Ĭolwill, R. Associations between the discriminative stimulus and the reinforcer in instrumental learning. Bower (Ed.), The psychology of learning and motivation (Vol. Associative structures in instrumental learning. Journal of Experimental Psychology: Animal Behavior Processes, 11, 120–132.Ĭolwill, R. Post-conditioning devaluation of a reinforcer affects instrumental responding. These results indicate that rats can separately encode features that differ along one dimension, both in the association between an instrumental response and its outcome, and in the association between a discriminative stimulus and that outcome.Ĭolwill, R. The stimuli selectively augmented the likelihood of the response with which they shared training by the same-flavored consequence. In Experiment 3, the animals chose between these responses in the presence of discriminative stimuli that had signaled the occurrence of these different features following another response.
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In both experiments, differences in the value of the features resulted in parallel differences in the likelihood of the responses during a subsequent extinction test. In Experiment 1, one of the features was subsequently devalued by pairing it with lithium chloride in Experiment 2, it was enhanced in value by pairing it with sucrose. In three experiments, thirsty rats were trained to make several instrumental responses whose outcomes differed in which of two relatively inconsequential flavor features they contained.