Abstract
In three experiments, rats were given a nonreinforced choice between two instrumental responses, in the presence of stimuli that had separately signalled the various outcomes those responses had earned. Whether those stimuli had been trained in a Pavlovian or instrumental procedure, they selectively enhanced the transfer response with which they shared an outcome. However, a subsequent test showed that this greater responding to a stimulus during extinction produced a reduced ability of that stimulus to augment its transfer response. These results are consistent with the development of an inhibitory S—R association during extinction.
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