Document Detail

The time course of perceptual choice: the leaky, competing accumulator model.
MedLine Citation:
PMID:  11488378     Owner:  NLM     Status:  MEDLINE    
The time course of perceptual choice is discussed in a model of gradual, leaky, stochastic, and competitive information accumulation in nonlinear decision units. Special cases of the model match a classical diffusion process, but leakage and competition work together to address several challenges to existing diffusion, random walk, and accumulator models. The model accounts for data from choice tasks using both time-controlled (e.g., response signal) and standard reaction time paradigms and its adequacy compares favorably with other approaches. A new paradigm that controls the time of arrival of information supporting different choice alternatives provides further support. The model captures choice behavior regardless of the number of alternatives, accounting for the log-linear relation between reaction time and number of alternatives (Hick's law) and explains a complex pattern of visual and contextual priming in visual word identification.
M Usher; J L McClelland
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Psychological review     Volume:  108     ISSN:  0033-295X     ISO Abbreviation:  Psychol Rev     Publication Date:  2001 Jul 
Date Detail:
Created Date:  2001-08-07     Completed Date:  2001-08-30     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0376476     Medline TA:  Psychol Rev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  550-92     Citation Subset:  IM    
Department of Psychology, Birkbeck College, University of London, England.
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MeSH Terms
Choice Behavior* / physiology
Models, Psychological
Neural Inhibition
Nonlinear Dynamics
Perception* / physiology
Stochastic Processes
Time Factors
Visual Perception / physiology
Grant Support

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