Abstract
Extinction of a conditioned palatability shift preceded extinction of conditioned taste avoidance whether rats were tested using a within-subjects design or a between-subjects design. In each of two experiments, consumption of 0.1% saccharin was paired with either 20 ml/kg of 0.15 M LiCl or equivolume physiological saline on a single trial. In Experiment 1, on each of 10 extinction trials, rats were given a taste reactivity test immediately prior to a consumption test. In Experiment 2, half of the rats were extinguished by taste reactivity testing and half of the rats were extinguished by a consumption test on each of 10 extinction trials. In both experiments, the aversive reactions of gaping and passive dripping were extinguished in a single trial and the suppression of ingestive reactions was extinguished in 2 trials; however, extinction of taste avoidance required 4–5 trials. These results suggest that rats continue to avoid a lithium-paired flavor even when they do not have an aversion to the taste.
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This research was supported by funding from the Natural Sciences and Research Council of Canada to L.A.P. and from the Ministry of Science and Technology of Spain (MCYT BSO-2003-03661) to M.L. and to R.C. (FPU, AP2002-2553).
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Cantora, R., López, M., Aguado, L. et al. Extinction of a saccharin—lithium association: Assessment by consumption and taste reactivity. Learning & Behavior 34, 37–43 (2006). https://doi.org/10.3758/BF03192869
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DOI: https://doi.org/10.3758/BF03192869