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. 2003 Feb;112(2):105-42.
doi: 10.1016/s0001-6918(02)00079-3.

Horse-race Model Simulations of the Stop-Signal Procedure

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Horse-race Model Simulations of the Stop-Signal Procedure

Guido P H Band et al. Acta Psychol (Amst). .

Abstract

In the stop-signal paradigm, subjects perform a standard two-choice reaction task in which, occasionally and unpredictably, a stop-signal is presented requiring the inhibition of the response to the choice signal. The stop-signal paradigm has been successfully applied to assess the ability to inhibit under a wide range of experimental conditions and in various populations. The current study presents a set of evidence-based guidelines for using the stop-signal paradigm. The evidence was derived from a series of simulations aimed at (a) examining the effects of experimental design features on inhibition indices, and (b) testing the assumptions of the horse-race model that underlies the stop-signal paradigm. The simulations indicate that, under most conditions, the latency, but not variability, of response inhibition can be reliably estimated.

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