Learned preference for a hedonically negative flavor is observed after pairings with positive post-ingestion consequences rather than with a palatable flavor |
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Authors: | Felisa Gonzá lez,David Garcí a-Burgos,Isabel de Brugada,Marta Gil |
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Affiliation: | Department of Experimental Psychology and Physiology of Behavior, University of Granada, Campus Cartuja s/n, 18071 Granada, Spain |
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Abstract: | In two experiments, thirsty rats consumed a compound of sucrose and a non-preferred flavor. In Experiment 1, a conditioned preference was observed in the experimental group when animals were tested both thirsty and hungry, but not when they were tested just thirsty. Animals in the control group, which experienced the flavor and the sucrose unpaired, never showed a preference. Experiment 2 replicated the absence of a preference in the experimental group when rats were tested thirsty, but provided evidence that a flavor-taste association had been formed during training. After conditioning, sucrose was paired with LiCl in group Dev whereas it was unpaired in group NonDev. The sucrose devaluation produced a decrease in CS preference in group Dev, and an increment in group NonDev. Taken together, these results show that preference for a non-preferred flavor can be readily observed after pairings with the positive consequences of the US (calories or absence of an expected illness) rather than with a palatable flavor. |
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Keywords: | Conditioned flavor preference Flavor-taste learning Flavor-nutrient learning Medicine effect |
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