Effect of CS US interval on the conditioning of odour preferences by amino acid loads

Simson, P C and Booth, D A (1973) Effect of CS US interval on the conditioning of odour preferences by amino acid loads. Physiology and Behavior, 11 (6). pp. 801-808. ISSN 0031-9384

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Presentation 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reinforcers used here generate internal unconditioned stimuli which have no capacity to condition reactions to stimuli withdrawn an hour or more previously.

Item Type: Article
Schools and Departments: School of Psychology > Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology > BF0180 Experimental psychology
Depositing User: prof. David Booth
Date Deposited: 01 Sep 2015 12:51
Last Modified: 01 Sep 2015 12:51
URI: http://srodev.sussex.ac.uk/id/eprint/56392
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