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Testing multi-alternative decision models with non-stationary evidence.
MedLine Citation:
PMID:  21603227     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Recent research has investigated the process of integrating perceptual evidence toward a decision, converging on a number of sequential sampling choice models, such as variants of race and diffusion models and the non-linear leaky competing accumulator (LCA) model. Here we study extensions of these models to multi-alternative choice, considering how well they can account for data from a psychophysical experiment in which the evidence supporting each of the alternatives changes dynamically during the trial, in a way that creates temporal correlations. We find that participants exhibit a tendency to choose an alternative whose evidence profile is temporally anti-correlated with (or dissimilar from) that of other alternatives. This advantage of the anti-correlated alternative is well accounted for in the LCA, and provides constraints that challenge several other models of multi-alternative choice.
Authors:
Konstantinos Tsetsos; Marius Usher; James L McClelland
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Publication Detail:
Type:  Journal Article     Date:  2011-05-04
Journal Detail:
Title:  Frontiers in neuroscience     Volume:  5     ISSN:  1662-453X     ISO Abbreviation:  Front Neurosci     Publication Date:  2011  
Date Detail:
Created Date:  2011-05-23     Completed Date:  2011-07-14     Revised Date:  2013-08-13    
Medline Journal Info:
Nlm Unique ID:  101478481     Medline TA:  Front Neurosci     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  63     Citation Subset:  -    
Affiliation:
Department of Psychology, Cognitive, Perceptual and Brain Sciences, University College London London, UK.
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