Abstract
Rats were administered apomorphine intraperitoneally following serial ingestion of saccharin and anise solutions. The animals had been previously familiarized with one of the solutions. An aversion to the novel stimuli developed independently of the flavor of the novel solution or of the order of presentation prior to apomorphine injection. Novelty was shown to be a more potent cue than was temporal contiguity in this particular conditioning of discriminated taste aversion. It was concluded that the long delays between CS and UCS presentation that have been found possible in the conditioned taste-aversion paradigm must be due to central processes and not to lingering aftertaste. Also, previously reported salience of certain tastes may be in part due to their novelty.
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