Document Detail

Acquisition of Operant Behavior in Rats with Delayed Reinforcement: A Retractable-Lever Procedure.
MedLine Citation:
PMID:  25464338     Owner:  NLM     Status:  Publisher    
Experimentally-naïve rats acquired lever pressing with delayed reinforcement when the immediate programmed consequence for lever pressing was the simultaneous retraction of two identical levers. Presses on one lever also produced access to sweetened condensed milk after a delay of 10seconds following retraction. Presses on the second lever resulted in retraction only. Lever retraction prevented the possibility of adventitious reinforcement of contacting the operanda during the reinforcement delays. Several measures indicated that the delayed reinforcers strengthened behavior. The majority of responses for all rats were on the lever that initiated reinforcer delivery. Responding for seven out of eight rats decreased during a subsequent extinction phase in which retraction was the only consequence arranged for lever pressing. Responding recovered rapidly when food reinforcement was available again. Furthermore, when contingencies on the two levers were switched, rats allocated their behavior accordingly, showing control by the delayed reinforcers.
Andrew A McNamara; Lyndsey E Johnson; Christopher Tate; Thomas Chiang; Tom Byrne
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-25
Journal Detail:
Title:  Behavioural processes     Volume:  -     ISSN:  1872-8308     ISO Abbreviation:  Behav. Processes     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-12-2     Completed Date:  -     Revised Date:  2014-12-3    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014. Published by Elsevier B.V.
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