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Effect of CS US interval on the conditioning of odour preferences by amino acid loads
journal contribution
posted on 2023-06-08, 22:17 authored by P C Simson, D A BoothPresentation of odourized protein-free diet for 4 or more hours after gastric intubation with a balanced amino acid mixture established a preference for the odour. A single pairing of odour presentation and the same gastric load with histidine omitted induced a conditioned aversion, i.e. the histidine-devoid load generated a negative US. Supplying the omitted histidine at or before the time the odourized diet was removed counteracted the deficiency- induced aversion by generating a positive US. When the balanced mixture or the histidine-devoid mixture was tubed one hour before or right at the end of a 4-hr odour presentation, no conditioned preference or aversion was formed. The results suggest that, in contrast to toxic reinforcers, the dosages of the nutritional reinforcers used here generate internal unconditioned stimuli which have no capacity to condition reactions to stimuli withdrawn an hour or more previously.
History
Publication status
- Published
Journal
Physiology and BehaviorISSN
0031-9384Publisher
ElsevierExternal DOI
Issue
6Volume
11Page range
801-808Department affiliated with
- Psychology Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2015-09-01Usage metrics
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