TY - JOUR
T1 - Testing multi-alternative decision models with non-stationary evidence
AU - Tsetsos, Konstantinos
AU - Usher, Marius
AU - McClelland, James L.
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Diffusion
KW - Inhibition
KW - Leaky integration
KW - Multiple alternatives
KW - Perceptual decisions
UR - http://www.scopus.com/inward/record.url?scp=84860363383&partnerID=8YFLogxK
U2 - 10.3389/fnins.2011.00063
DO - 10.3389/fnins.2011.00063
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AN - SCOPUS:84860363383
SN - 1662-4548
JO - Frontiers in Neuroscience
JF - Frontiers in Neuroscience
IS - MAY
M1 - Article 63
ER -