Testing the drift-diffusion model

Drew Fudenberg, Whitney Newey, Philipp Strack () and Tomasz Strzalecki

Proceedings of the National Academy of Sciences, 2020, vol. 117, issue 52, 33141-33148

Abstract: The drift-diffusion model (DDM) is a model of sequential sampling with diffusion signals, where the decision maker accumulates evidence until the process hits either an upper or lower stopping boundary and then stops and chooses the alternative that corresponds to that boundary. In perceptual tasks, the drift of the process is related to which choice is objectively correct, whereas in consumption tasks, the drift is related to the relative appeal of the alternatives. The simplest version of the DDM assumes that the stopping boundaries are constant over time. More recently, a number of papers have used nonconstant boundaries to better fit the data. This paper provides a statistical test for DDMs with general, nonconstant boundaries. As a by-product, we show that the drift and the boundary are uniquely identified. We use our condition to nonparametrically estimate the drift and the boundary and construct a test statistic based on finite samples.

Keywords: response times; drift-diffusion model; statistical test (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (4)

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Related works:
Working Paper: Testing the Drift-Diffusion Model (2019)
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Persistent link: https://EconPapers.repec.org/RePEc:nas:journl:v:117:y:2020:p:33141-33148

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