Abstract
Three groups of anosmic rats served as subjects in a two-stage experiment investigating the effects of surgically produced anosmia on behavior in a differential conditioning situation. Differential responding failed to develop during training (Phase I) for either of the two groups of subjects receiving differential reinforcement (large vs. small) in two straight runways of different brightness. Further, the performance of these two groups did not differ from that of a control group receiving small reward in both runways. Some differential responding was shown during extinction (Phase II), suggesting that a preference for the large reward alternative had been established during Phase I by those subjects experiencing differential reinforcement. Possible mechanisms underlying the behavior of the anosmic subject in this situation are discussed.
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