Document Detail

Discrimination of variable schedules is controlled by interresponse times proximal to reinforcement.
MedLine Citation:
PMID:  23144509     Owner:  NLM     Status:  MEDLINE    
In Experiment 1, food-deprived rats responded to one of two schedules that were, with equal probability, associated with a sample lever. One schedule was always variable ratio, while the other schedule, depending on the trial within a session, was: (a) a variable-interval schedule; (b) a tandem variable-interval, differential-reinforcement-of-low-rate schedule; or (c) a tandem variable-interval, differential-reinforcement-of-high-rate schedule. Completion of a sample-lever schedule, which took approximately the same time regardless of schedule, presented two comparison levers, one associated with each sample-lever schedule. Pressing the comparison lever associated with the schedule just presented produced food, while pressing the other produced a blackout. Conditional-discrimination accuracy was related to the size of the difference in reinforced interresponse times and those that preceded it (predecessor interresponse times) between the variable-ratio and other comparison schedules. In Experiment 2, control by predecessor interresponse times was accentuated by requiring rats to discriminate between a variable-ratio schedule and a tandem schedule that required emission of a sequence of a long, then a short interresponse time in the tandem's terminal schedule. These discrimination data are compatible with the copyist model from Tanno and Silberberg (2012) in which response rates are determined by the succession of interresponse times between reinforcers weighted so that each interresponse time's role in rate determination diminishes exponentially as a function of its distance from reinforcement.
Takayuki Tanno; Alan Silberberg; Takayuki Sakagami
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  98     ISSN:  1938-3711     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-12     Completed Date:  2013-05-03     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  341-54     Citation Subset:  IM    
Keio University, Japan.
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MeSH Terms
Conditioning, Operant
Discrimination Learning*
Pattern Recognition, Physiological
Rats, Wistar
Reaction Time*
Reinforcement (Psychology)*
Reinforcement Schedule*
Time Perception*

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