ERIC Number: EJ730810
Record Type: Journal
Publication Date: 2004-Nov
Successive Negative Contrast after Partial Reinforcement in the Consummatory Behavior of Rats
Pellegrini, Santiago; Muzio, Ruben N.; Mustaca, Alba E.; Papini, Mauricio R.
Learning and Motivation, v35 n4 p303-321 Nov 2004
Rats given access to a 32% sucrose solution later reject a 4% solution significantly more than controls that have only received the 4% solution. In Experiment 1, this consummatory successive negative contrast (cSNC) effect was attenuated by previous exposure to 50% partial reinforcement. Furthermore, recovery from cSNC was also facilitated by partial reinforcement. In Experiment 2, the attenuating effects of partial reinforcement on cSNC were eliminated by administration of the benzodiazepine anxiolytic chlordiazepoxide (5mg/kg) before nonreinforced trials. In Experiment 3, the attenuating effect of partial reinforcement was greater after a shift from 32 to 6% solution, than after a shift from 32 to 2% solution. The parallels between the effects of partial reinforcement on consummatory and instrumental behavior are discussed.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
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