Document Detail

Temporal discrimination using different feature--target intervals in classical conditioning of the rabbit's nictitating membrane response.
MedLine Citation:
PMID:  12391787     Owner:  NLM     Status:  MEDLINE    
In a typical conditional discrimination, a target stimulus (X) is reinforced during one feature cue (A-->X+), but not during another feature cue (B-->X-). The present experiments used only a single "feature" cue (a 66-sec tone). On half of the trials, the target stimulus (a 400-msec light) was paired with the reinforcer when the feature-target interval was one duration (e.g., 5 sec). On the remaining trials, the interval was different (e.g., 45 sec), and the target stimulus was presented without the reinforcer. All the animals acquired this temporal discrimination, and subsequent testing with other feature-target intervals yielded generalization-like gradients. These results provide solid evidence that each portion of a feature cue is encoded in a distinctive fashion. Had temporal encoding not occurred, the feature cue would have been just as ambiguous a predictor of the reinforcer as was the target stimulus, and discrimination would not have been possible. The integration of real-time temporal encoding mechanisms into models of conditional discrimination is discussed.
E J Kehoe; K G Boesenberg
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Animal learning & behavior     Volume:  30     ISSN:  0090-4996     ISO Abbreviation:  Anim Learn Behav     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-10-23     Completed Date:  2002-11-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0357415     Medline TA:  Anim Learn Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  208-16     Citation Subset:  IM    
School of Psychology, University of New South Wales, Sydney, NSW 2052, Australia.
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MeSH Terms
Behavior, Animal
Conditioning, Classical*
Discrimination Learning*
Nictitating Membrane / physiology*
Time Perception*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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