The potentiation of conditioned reinforcement by psychomotor stimulant drugs. A Test of Hill's Hypothesis

  • Robbins T
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Tested R. T. Hill's (1970) hypothesis that psychomotor stimulant drugs potentiate the effects of conditioned reinforcement (CR). Four experiments were conducted with 24 male Wistar albino rats, using a choice paradigm in extinction, and several doses of pipradrol. In Exp I it was found that a dose of 10 mg/kg pipradrol increased responding on a lever providing CR, but depressed responding on a lever providing no CR. Exps II and III tested whether the drug enhanced reinforcing rather than unconditioned properties of the CR stimulus. Evidence was in favor of the former, but certain results support the existence of other factors which might contribute to the potentiation effect. In Exp IV the factors contributing to the failure of some Subjects to show stimulation of operant behavior following pipradrol were examined. No simple explanation is available for this failure. (PsycINFO Database Copyright 1976 American Psychological Assn, all rights reserved)

Author-supplied keywords

  • Conditioned reinforcement
  • Facilitation
  • Pipradrol
  • Rats
  • Stimulant drugs

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  • T. W. Robbins

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