Abstract
After rats were conditioned to prefer a flavor (CS+) paired with sucrose over another flavor (CS−) paired with saccharin, this conditioned flavor preference was extinguished by presenting the CS+ flavor without sucrose. These results were replicated in a second experiment in which spontaneous recovery of the extinguished flavor preference was demonstrated 7, 14, and 21 days after the extinction test. This is the first clear demonstration of the extinction and spontaneous recovery of a conditioned flavor preference based on calories. The implications of these results for our understanding of the mechanism underlying the conditioning of flavor preferences are explored.
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