Abstract
A series of experiments was conducted to examine the phenomenon of potentiation. Experiment 1 demonstrated potentiation of odor aversions by taste when morphine served as the unconditioned stimulus (US). Experiment 2 provided evidence that the observed potentiation was due to a within-event association between odor and taste stimuli, rather than reflecting an enhanced odor-morphine association. In Experiment 3, morphine supported place conditioning to contextual cues and aversive conditioning to a taste cue, but potentiation of place conditioning by a taste cue was not obtained. Apparently the absence of potentiation was due to the dual nature of the morphine US, as potentiation of a contextual aversion by taste was obtained in Experiment 4 when a strictly aversive US (lithium) was used. These data suggest that potentiation depends on (1) an initially weak association between the to-be-potentiated conditioned stimulus (CS) element and the US, and (2) the elicitation of qualitatively similar responses by the individual elements of the CS compound. Collectively, these results support an explanation of potentiation based on within-event learning.
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This research was supported in part by National Institute of Health Grant NS 21655 to D. F. McCoy.
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Miller, J.S., McCoy, D.F., Kelly, K.S. et al. A within-event analysis of taste-potentiated odor and contextual aversions. Animal Learning & Behavior 14, 15–21 (1986). https://doi.org/10.3758/BF03200032
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DOI: https://doi.org/10.3758/BF03200032