Abstract
Four food-deprived rats were trained to barpress on a fixed-interval 60-sec reinforcement schedule. When polydipsic drinking was well established, animals were exposed to off-line conditioning of 3-min stimulus periods terminating with brief footshocks. When reintroduced to the barpressing chambers, all rats exhibited partial suppression of baseline (no CS) bar-pressing and elevation of baseline drinking. Three rats showed similar but more pronounced alterations in the third minute of the CS. These results support a previously untested assumption that schedule-induced drinking is emotionally aroused.
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