Document Detail


Choice between reliable and unreliable reinforcement alternatives revisited: Preference for unreliable reinforcement.
MedLine Citation:
PMID:  16812746     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Pigeons' choices between a reliable alternative that always provided food after a delay (i.e., 100% reinforcement) and an unreliable one that provided food or blackout equally often after a delay (i.e., 50% reinforcement) was studied using a discrete-trials concurrent-chains procedure modified to prevent choice between alternatives following a blackout outcome. Initial links were fixed-ratio 1 schedules, and terminal links were fixed-time schedules. Stimuli presented during the terminal-link delays were correlated with the food and blackout outcomes. In Experiment 1, terminal-link durations were varied. With short terminal links (i.e., 10 s), 6 of 8 subjects showed strong preference for the 50% side. As terminal-link duration increased to 30 s, preference, regardless of direction, became less extreme. In Experiment 2, the side-key location of the 50% and 100% alternatives was reversed for 3 subjects. Preference for the 50% alternative reoccurred following the key reversal. When a 5-s separation was subsequently interposed between the initial and terminal links for both alternatives, all birds reversed to a preference for the 100% side. In general, the strong preference for the 50% side was qualitatively consistent with the expectation that the procedure enhanced the conditioned-reinforcement effectiveness of the food-associated terminal-link stimulus on the 50% side. Implications of the results for various accounts of choice of the 50% alternative are discussed.
Authors:
T W Belke; M L Spetch
Related Documents :
3580106 - Prediction and control of food rewards modulate endogenous pain inhibitory systems.
14014606 - Transfer across drives of the discriminative effect of a pavlovian conditioned stimulus.
1365666 - Cocaine decreases self-control in rats: a preliminary report.
12175446 - Pavlovian autoshaping procedures increase plasma corticosterone levels in rats.
8384476 - Cholecalciferol supplementation alters gut function and improves digestibility in an un...
16310226 - Spatial distribution and ecotoxicity of petroleum hydrocarbons in sediments from the ga...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  62     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  1994 Nov 
Date Detail:
Created Date:  2010-06-29     Completed Date:  2010-06-29     Revised Date:  2010-09-15    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  353-66     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Comments/Corrections

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


Previous Document:  The transfer of respondent eliciting and extinction functions through stimulus equivalence classes.
Next Document:  Instructional versus schedule control of humans' choices in situations of diminishing returns.