Abstract
Four experiments examined whether or not spontaneous recovery could occur after extinction in the conditioned taste-aversion paradigm. After three extinction trials, spontaneous recovery was obtained over an 18-day retention interval (Experiments 1, 2, and 3). The effect was not due to changes in the unconditioned preference for saccharin over the retention interval (Experiment 2) or to an increase in a nonextinguished aversion over time, as indicated by tests with both the original, nonextinguished aversion (Experiment 1) and with a weaker one (Experiment 3). Spontaneous recovery was not obtained when extinction was overtrained (eight trials) and a 49-day retention interval was used (Experiment 4). However, saccharin intake at asymptote reached the level of baseline water intake, and not the highly preferred level shown by never-conditioned controls. Results of all four experiments suggest that extinction does not return an averted taste to the status of an unconditioned one.
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This research was supported by a grant from the Basque Government’s Programa de Formación de Investigadores (Ref. BFI94.140) to J.M.R. and by U.S. National Science Foundation Grant IBN-9209454 to M.E.B.
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Rosas, J.M., Bouton, M.E. Spontaneous recovery after extinction of a conditioned taste aversion. Animal Learning & Behavior 24, 341–348 (1996). https://doi.org/10.3758/BF03198982
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DOI: https://doi.org/10.3758/BF03198982