Effects of chlorpromazine and d-amphetamine on escape and avoidance behavior under a temporally defined schedule of negative reinforcement.

Chlorpromazine hydrochloride and d-amphetamine sulphate were administered to two rats responding on a baseline temporally defined schedule of negative reinforcement which produced both "escape-like" and "avoidance-like" behavior. The effects of these drugs appeared similar to those expected on the more customary sort of non-cued avoidance schedule.