Document Detail

Exploring a concurrent-chains paradox: decreasing preference as an initial link is shortened.
MedLine Citation:
PMID:  15656723     Owner:  NLM     Status:  MEDLINE    
Experiments with pigeons and rats on concurrent-chains schedules examined a paradoxical effect reported by R. A. Preston and E. Fantino (1991). One schedule in the concurrent chain had a variable-interval (VI) 60-s initial link, and its terminal link was a 10-s delay to food. The other schedule had an initial link that ranged from VI 60 s to VI 2 s, and its terminal link was a 20-s delay to food. The paradoxical effect--a decrease in preference for the 20-s delay as its initial link was shortened--was found in some conditions but not in others. An analysis of response-reinforcer delays suggested that the paradoxical effect occurred in conditions in which responding on the short VI schedule almost always led to the 20-s delay, eliminating the possibility of switching to the alternative with the shorter delay.
James E Mazur
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of experimental psychology. Animal behavior processes     Volume:  31     ISSN:  0097-7403     ISO Abbreviation:  J Exp Psychol Anim Behav Process     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-01-19     Completed Date:  2005-08-03     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7504289     Medline TA:  J Exp Psychol Anim Behav Process     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3-17     Citation Subset:  IM    
Copyright Information:
Copyright 2005 APA.
Psychology Department, Southern Connecticut State University, New Haven, CT 06515, USA.
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MeSH Terms
Association Learning
Choice Behavior*
Color Perception
Discrimination Learning
Models, Psychological
Psychomotor Performance
Reaction Time
Reinforcement Schedule*
Grant Support

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