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The Drift Diffusion Model can account for the accuracy and reaction time of value-based choices under high and low time pressure

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Author Info

  • Milica Milosavljevic
  • Jonathan Malmaud
  • Alexander Huth
  • Christof Koch
  • Antonio Rangel
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    Abstract

    An important open problem is how values are compared to make simple choices. A natural hypothesis is that the brain carries out the computations associated with the value comparisons in a manner consistent with the Drift Diffusion Model (DDM), since this model has been able to account for a large amount of data in other domains. We investigated the ability of four different versions of the DDM to explain the data in a real binary food choice task under conditions of high and low time pressure. We found that a seven-parameter version of the DDM can account for the choice and reaction time data with high-accuracy, in both the high and low time pressure conditions. The changes associated with the introduction of time pressure could be traced to changes in two key model parameters: the barrier height and the noise in the slope of the drift process.

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    File URL: http://journal.sjdm.org/10/9224/jdm9224.pdf
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    Bibliographic Info

    Article provided by Society for Judgment and Decision Making in its journal Judgment and Decision Making.

    Volume (Year): 5 (2010)
    Issue (Month): 6 (October)
    Pages: 437-449

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    Handle: RePEc:jdm:journl:v:5:y:2010:i:6:p:437-449

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    Related research

    Keywords: drift-diffusion model; value-based choice; response time.;

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