Document Detail

Interval duration effects on blocking in appetitive conditioning.
MedLine Citation:
PMID:  16378697     Owner:  NLM     Status:  MEDLINE    
Three experiments examined absolute (Experiment 1) and relative (Experiments 2a and 2b) duration effects on blocking. In Experiment 1, rats were pretrained with a short or long conditioned stimulus (CS1) followed by food, after which they were given reinforced short-short or long-long CS1-CS2 simultaneous compounds. Compared to overshadowing control groups, both pretrained groups displayed blocking, and there was no clear effect of absolute stimulus duration on the magnitude of blocking. In Experiments 2a and 2b, the rats received partially overlapping short-long CS1-CS2 compounds. In both experiments, a long CS1 blocked a short CS2, but not vice versa. This was the case when the long CS1 was nine times (Experiment 2a) or only 1.5 times (Experiment 2b) the duration of the short CS2. The pattern of results is most consistent with a real-time model of conditioning, such as the Sutton and Barto [Sutton, R.S., Barto, A.G., 1990. Time derivative models of Pavlovian reinforcement. In: Gabriel, M.R., Moore, J.W. (Eds.), Learning and Computational Neuroscience: Foundations of Adaptive Networks. MIT Press, Cambridge, MA, 497-537] temporal difference model.
Dómhnall Jennings; Kimberly Kirkpatrick
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-12-27
Journal Detail:
Title:  Behavioural processes     Volume:  71     ISSN:  0376-6357     ISO Abbreviation:  Behav. Processes     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-01-31     Completed Date:  2006-05-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  318-29     Citation Subset:  IM    
Department of Psychology, University of York, Heslington, York YO10 5DD, United Kingdom.
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MeSH Terms
Appetitive Behavior / physiology*
Attention / physiology*
Conditioning, Operant / physiology*
Perceptual Masking / physiology*
Random Allocation
Rats, Sprague-Dawley
Reactive Inhibition
Reinforcement (Psychology)
Time Perception / physiology*

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