Document Detail

Do rats time filled and empty intervals of equal duration differently?
MedLine Citation:
PMID:  17343993     Owner:  NLM     Status:  MEDLINE    
The goal was to determine whether rats time filled and empty intervals of equal duration differently. Each of five rats was trained for 50 sessions on an instrumental appetitive head entry procedure in which food was available (primed) every 120 s. On "empty" cycles, 30s prior to the next food prime, a 0.5-s pulse of white noise was presented. On "filled" cycles, 30s prior to the next food prime, white noise came on and stayed on until food was delivered. The two types of cycles were presented with equal probability. The results showed that the rats timed both the food-to-food interval and the stimulus-to-food interval. A comparison of the response gradients on filled and empty cycles following stimulus presentation showed better temporal discrimination on filled cycles. The results were modeled using a Packet theory of timing, with a linear averaging rule to combine the temporal information provided by the stimulus and food. The model fits to the individual response gradients were evaluated with a Turing test.
Mika L M Macinnis
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2007-02-08
Journal Detail:
Title:  Behavioural processes     Volume:  75     ISSN:  0376-6357     ISO Abbreviation:  Behav. Processes     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-04-24     Completed Date:  2007-07-06     Revised Date:  2007-12-03    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  182-7     Citation Subset:  IM    
Department of Psychology, Box 1853, Brown University, Providence, RI 02912, USA.
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MeSH Terms
Attention / physiology*
Conditioning, Operant / physiology*
Discrimination (Psychology) / physiology*
Perceptual Masking / physiology*
Rats, Sprague-Dawley
Reinforcement Schedule
Time Perception / physiology*
Grant Support

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