Document Detail

Response allocation in concurrent chains when terminal-link delays follow an ascending and descending series.
MedLine Citation:
PMID:  19230509     Owner:  NLM     Status:  MEDLINE    
Eight pigeons were trained in a concurrent-chains procedure in which the terminal-link immediacy ratio followed an ascending or descending series. Across sessions, one terminal-link delay changed from 2 s to 32 s to 2 s or from 32 s to 2 s to 32 s, while the other was always 8 s. For all pigeons, response allocation tracked changes in delay and was biased towards the 8-s alternative on the descending series, indicating a hysteresis effect, and was more sensitive to changes in the terminal-link delay ratio for relatively long (> 8 s) than short (< 8 s) delays. Both the hysteresis and effect of delay duration were predicted by an extended version of Grace and McLean's (2006) decision model. The extended decision model provided an overall better account of the results than a simple linear-operator model (Grace, 2002), and holds promise for an integrated account of choice in concurrent chains for both acquisition and steady-state conditions.
Darren R Christensen; Randolph C Grace
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  91     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-02-23     Completed Date:  2009-04-21     Revised Date:  2010-09-23    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-20     Citation Subset:  IM    
University of Arkansas for Medical Sciences, USA.
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MeSH Terms
Behavior, Animal
Choice Behavior*
Conditioning, Operant*
Reinforcement (Psychology)*

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

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