In Experiment 1, animals poisoned following schedule-induced or prandial-induced saccharin consumption subsequently showed identical aversions to saccharin when tested under water deprivation. In Experiment 2, animals conditioned to avoid saccharin to similar levels under water deprivation were differentially affected when saccharin was subsequently presented on the baselines of schedule-induced and prandial-induced drinking. Together, these data indicate that the differential effects observed on schedule-induced and prandial-induced drinking when animals are poisoned following consumption under these two schedules do not reflect the differential acquisition of taste aversions, but instead reflect the differential tendencies to drink induced by the spaced and massed feedings.
281In relation to drinking induced by water deprivation or the presentation of a single massed meal, scheduleinduced drinking (Falk, 1961) is insensitive to conditioned taste aversions; that is, the presentation of a previously poisoned saccharin solution only weakly and transiently suppresses schedule-induced polydipsia, an effect in marked contrast to the rapidly acquired and long-lasting aversions produced in water-deprived or mass-fed animals (Clarke &
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