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| Journal of the Experimental… | 2 |
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Direct linkHughes, Christine; Sigmon, Stacey C.; Pitts, Raymond C.; Dykstra, Linda A. – Journal of the Experimental Analysis of Behavior, 2005
Key pecking by 3 pigeons was maintained by a multiple fixed-ratio 10, fixed-ratio 30, fixed-ratio 90 schedule of food presentation. Components differed with respect to amount of reinforcement, such that the unit price was 10 responses per 1-s access to food. Acute administration of morphine, "l"-methadone, and cocaine dose-dependently decreased…
Descriptors: Narcotics, Animals, Reinforcement, Food
Li, Mi; Wessinger, William D.; McMillan, D. E. – Journal of the Experimental Analysis of Behavior, 2005
Three pigeons were trained to discriminate among 5 mg/kg pentobarbital, 2 mg/kg amphetamine, a combination of these two drugs at these doses, and saline using a four-choice procedure (amphetamine--pentobarbital group). Three other pigeons were trained to discriminate among 5 mg/kg morphine, 2 mg/kg methamphetamine, a combination of these two drugs…
Descriptors: Drug Use, Animal Behavior, Animals, Training
