Abstract
Under a 2 mg per kg intraperitoneal injection of apomorphine, four female Long Evans hooded rats were placed on continuous and fixed ratio reinforcement schedules using a gnawable pine block. Ss would learn to turn their heads away from the gnawable object in order to obtain 15 sec. of gnawing time. The rate of response increased from less than one response in 5 min. to over 3 responses per min. in 10 1½ hr. conditioning sessions. Rates of response stabilized during the last 5 experimental sessions and fixed ratio schedules of up to 5:1 were obtained in five additional 1½ hr. sessions.
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References
Ernst, A. M. Relation between the action of dopomine and apomorphine. Psychopharmacology, 1965, 7, 391–399.
Weissman, A. Apomorphine elicitation of key pecking in pigeons. Arch. int. Pharmacodyn. They., 1966, 160, 330–334.
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1. This study was based on a Master’s Thesis by the first author. The authors wish to thank Frank Stermitz for many valuable suggestions. Support for the study was obtained from the Utah State Uniform School Fund 235.
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Robinson, P., Daley, M. & Wolff, P.C. Apomorphine induced reinforcement. Psychon Sci 7, 117–118 (1967). https://doi.org/10.3758/BF03328492
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DOI: https://doi.org/10.3758/BF03328492