Document Detail


Pigeons' discounting of probabilistic and delayed reinforcers.
MedLine Citation:
PMID:  21451742     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Pigeons' discounting of probabilistic and delayed food reinforcers was studied using adjusting-amount procedures. In the probability discounting conditions, pigeons chose between an adjusting number of food pellets contingent on a single key peck and a larger, fixed number of pellets contingent on completion of a variable-ratio schedule. In the delay discounting conditions, pigeons chose between an adjusting number of pellets delivered immediately and a larger, fixed number of pellets delivered after a delay. Probability discounting (i.e., subjective value as a function of the odds against reinforcement) was as well described by a hyperboloid function as delay discounting was (i.e., subjective value as a function of the time until reinforcement). As in humans, the exponents of the hyperboloid function when it was fitted to the probability discounting data were lower than the exponents of the hyperboloid function when it was fitted to the delay discounting data. The subjective values of probabilistic reinforcers were strongly correlated with predictions based on simply substituting the average delay to their receipt in each probabilistic reinforcement condition into the hyperboloid discounting function. However, the subjective values were systematically underestimated using this approach. Using the discounting function proposed by Mazur (1989), which takes into account the variability in the delay to the probabilistic reinforcers, the accuracy with which their subjective values could be predicted was increased. Taken together, the present findings are consistent with Rachlin's (Rachlin, 1990; Rachlin, Logue, Gibbon, & Frankel, 1986) hypothesis that choice involving repeated gambles may be interpreted in terms of the delays to the probabilistic reinforcers.
Authors:
Leonard Green; Joel Myerson; Amanda L Calvert
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  94     ISSN:  1938-3711     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2011-03-31     Completed Date:  2011-08-18     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  113-23     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Choice Behavior*
Columbidae
Conditioning, Operant*
Female
Food
Models, Psychological
Neuropsychological Tests
Probability Learning*
Reinforcement (Psychology)*
Reinforcement Schedule
Reward
Grant Support
ID/Acronym/Agency:
MH055308/MH/NIMH NIH HHS; R01 MH055308/MH/NIMH NIH HHS; R01 MH055308-16/MH/NIMH NIH HHS
Comments/Corrections

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


Previous Document:  SOCR: Statistics Online Computational Resource.
Next Document:  Factors impacting emergence of behavioral control by underselected stimuli in humans after reduction...