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reinforcers used here generate internal unconditioned stimuli which have no capacity to condition reactions to stimuli withdrawn an hour or more previously.

History

Publication status

  • Published

Journal

Physiology and Behavior

ISSN

0031-9384

Publisher

Elsevier

Issue

6

Volume

11

Page range

801-808

Department affiliated with

  • Psychology Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2015-09-01

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    University of Sussex (Publications)

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