Document Detail

Serial discrimination reversal learning in pigeons as a function of signal properties during the delay of reinforcement.
MedLine Citation:
PMID:  23292506     Owner:  NLM     Status:  Publisher    
Pigeons learned a series of reversals of a simultaneous red-green discrimination with a 6-s delay of reinforcement. The signal properties during the 6-s reinforcement delay were varied across blocks of reversals, such that the delay was either unsignaled (intertrial interval conditions during the delay) or signaled by illumination of the center key. Four different signal conditions were presented: (1) signals only after S+ responses, (2) signals only after S- responses, (3) differential signals after S+ versus S- responding, and (4) the same nondifferential signals after S+ and S- responses. (A zero-delay control condition was also included.) Learning was at a high level in the S+ -only and differential-signal conditions, and learning was at a low level during the unsignaled, nondifferentially signaled, and S- signal conditions. Thus, a differential stimulus contingent on correct choices was necessary for proficient learning-to-learn, even though within-reversal learning occurred in all conditions. During the S+ and differential-signal conditions, improvement in learning continued to occur even after more than 240 reversals (more than 38,000 trials).
Bertram O Ploog; Ben A Williams
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-6
Journal Detail:
Title:  Learning & behavior     Volume:  -     ISSN:  1543-4508     ISO Abbreviation:  Learn Behav     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101155056     Medline TA:  Learn Behav     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
College of Staten Island, Center for Developmental Neuroscience, and Graduate School & University Center of the City University of New York, Staten Island, NY, USA,
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