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Two studies were conducted to assess the effect of auditory and olfactory stimuli on drinking that had been suppressed with a conditioned taste aversion procedure. Each study used a different conditioned stimulus. The first used an 8% saccharin solution which was readily consumed by rats, while the second used a 1% anise solution that was not as readily consumed by rats. The use of a relatively...
We assessed the effects of repeated extinction and reversals of two conditional stimuli (CS+/CS−) on an appetitive conditioned approach response in rats. Three results were observed that could not be accounted for by a simple linear operator model such as the one proposed by Rescorla and Wagner (1972): (1) responding to a CS− declined faster when a CS+ was simultaneously extinguished; (2) reacquisition...
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