In 3 experiments, food-deprived rats either lever-pressing for intermittent food pellets or obtaining them on free-fixed interval schedules displayed schedule-induced water and alcohol polydipsia. Concurrent response-independent electric shock attenuated water intake, shock intensities producing reductions in polydipsic water consumption had little effect upon alcohol intake, but shocks of sufficient intensity did attenuate post-pellet alcohol drinking. Possible explanations for the differential effect of response-independent electric shock on schedule-induced water and alcohol intake are discussed.
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