Abstract
The effects of haloperidol 0.1 mg/kg on the partial reinforcement extinction effect (PREE) paradigm at one trial a day, were examined. Two groups of rats were trained to run in a straight alley. The continuously reinforced (CRF) group received food reward on every trial. The partially reinforced (PRF) group was rewarded on a quasirandom 50% schedule. All animals were then tested in extinction. Haloperidol 0.1 mg/kg was administered in a 2 × 2 design, i.e., drug-no drug in acquisition and drug-no drug in extinction. The PREE, i.e., increased resistance to extinction of partially reinforced as compared to continuously reinforced animals, was obtained in all four drug conditions. The administration of haloperidol in acquisition increased markedly resistance to extinction in CRF animals. The administration of the drug in extinction decreased resistance to extinction in both CRF and PRF animals. The results are explained in terms of two independent actions of haloperidol: the well-known effect of reduction in the effectiveness of reinforcement as well as enhancement of the effectiveness of nonreinforcement.
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Feldon, J., Katz, Y. & Weiner, I. The effects of haloperidol on the partial reinforcement extinction effect (PREE): implications for neuroleptic drug action on reinforcement and nonreinforcement. Psychopharmacology 95, 528–533 (1988). https://doi.org/10.1007/BF00172968
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DOI: https://doi.org/10.1007/BF00172968