Document Detail

Energy budget versus temporal discounting as determinants of preference in risky choice.
MedLine Citation:
PMID:  15240052     Owner:  NLM     Status:  MEDLINE    
Four pigeons and three ringneck doves responded on an operant simulation of natural foraging. After satisfying a schedule of reinforcement associated with search time, subjects could "accept" or "reject" another schedule of reinforcement associated with handling time. Two schedules of reinforcement were available, a variable interval, and a fixed interval with the same mean value. Food available in the session (a variable related to the energy budget) was manipulated in the different conditions either by increases of the value of the search state schedule of reinforcement, or by increases in the mean value of the handling state schedules. The results indicate that the amount of food available in the session did not affect the preference for variable schedules of reinforcement, as would be predicted by an influential theory of risk sensitive foraging. Instead, the preference for variability depended on the relationship between the time spent in the search and the handling states, as is predicted by a family of models of choice that are based on the temporal proximity to the reinforcer.
Vladimir Orduña; Arturo Bouzas
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Behavioural processes     Volume:  67     ISSN:  0376-6357     ISO Abbreviation:  Behav. Processes     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-07-08     Completed Date:  2005-02-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  147-56     Citation Subset:  IM    
Facultad de Psicología, Universidad Nacional Autónoma de México, México D.F. 04510, Mexico.
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MeSH Terms
Behavior, Animal
Choice Behavior*
Energy Metabolism / physiology*
Models, Psychological
Psychological Theory
Reinforcement (Psychology)*

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