Effects of drug-induced differences in reinforcement frequency on discriminative stimulus properties of fentanyl

Abstract

Rats were trained to discriminate between fentanyl (0.04 mg/kg) and saline in a two-lever procedure. Using a FR 10 schedule of food reinforcement, drug-induced differences between the number of reinforcers obtained under fentanyl and saline conditions were observed. The effect of eliminating these differences on the outcome of generalization tests was… (More)
DOI: 10.1007/BF00464790

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