Abstract
Research was undertaken to assess the importance of a response contingency on the development of conditioned taste preferences (CTPs). Water deprived rats implanted with lateral hypothalamic electrodes were given access to a lever which produced rewarding brain stimulation (response contingent rewarding stimulation) or had the stimulation administered at a rate determined by the experimenter (non-contingent rewarding stimulation) after drinking a novel tasting (coffee) solution. Consumption of the novel tasting solution was measured in a subsequent preference test. The results indicate that while response contingent stimulation produces reliable CTPs, non-contingent stimulation shows no evidence of inducing such preferences at any of the stimulation parameters employed. It was concluded that a reliable rate free measure of the rewarding aspects of brain stimulation could not be developed using non-contingent rewarding brain stimulation in conjunction with the CTP paradigm.
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