Document Detail

Timing, remembering, and discrimination.
MedLine Citation:
PMID:  17345949     Owner:  NLM     Status:  MEDLINE    
Four pigeons were first trained in a timing procedure. In one condition, each trial began with the presentation of an X on the center key, followed by a delay (short or long), after which two side keys were lit. If the delay was short, pecks to the red side key were reinforced. If the delay was long, pecks to the green side key were reinforced. In a second condition, the opposite contingencies applied following presentation of a square on the center key. Choice responses were then tested at 10 time intervals ranging from short to long (1 to 4 s and 4 to 7 s in different conditions). The two timing conditions were combined to create a remembering condition in which correct responding depended upon discrimination of both the sample stimulus (X or square) and the delay interval (short or long). Choices varied systematically across delay in timing conditions, but in remembering conditions, accurate choice at the training delays did not initially generalize to intermediate delays. However, with prolonged training in the remembering task, the response pattern began to resemble that of the timing conditions. Generalization gradients were asymmetrical, in accordance with Weber's Law, in that greater generalization occurred with longer delays than with shorter delays.
Rebecca J Sargisson; K Geoffrey White
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  87     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-03-09     Completed Date:  2007-05-02     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  25-37     Citation Subset:  IM    
Department of Psychology, University of Otago, Dunedin, New Zealand.
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MeSH Terms
Appetitive Behavior
Association Learning*
Color Perception*
Discrimination Learning*
Generalization, Stimulus
Memory, Short-Term
Mental Recall*
Time Perception*

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

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