Abstract
Three experiments investigated the effects on taste-reinforced straight alley performance of a single, response-contingent toxicosis exposure. In Experiment 1, rats ran on a single conditioning trial to a goalbox containing a saccharin reward and a distinct peppermint odor. Controls ran for a water reward in the presence of the same odor. All animals were then injected with lithium chloride. Experiment 2A was procedurally identical to Experiment 1 except the goalbox did not contain the distinct odor on the conditioning trial. On extinction tests in the presence of the odor (Experiment 1) or without the odor (Experiment 2A), instrumental behavior was disrupted in the groups that drank saccharin in the goalbox during conditioning. Experiment 2B ruled out the possible contribution of neophobia-mediated punishment to these effects. Taken together, the outcomes of these experiments indicate that straight alley locomotor behavior can be used as a noningestive assessment of taste-mediated potentiation.
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