The urgency-gating model can explain the effects of early evidence

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• 作者：Matthew A. Carland ; David Thura ; Paul Cisek
• 关键词：Decision making ; Response time models ; Computational modeling ; Drift ; diffusion model ; Perceptual discrimination
• 刊名：Psychonomic Bulletin & Review
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：22
• 期：6
• 页码：1830-1838
• 全文大小：725 KB
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• 作者单位：Matthew A. Carland (1)
  David Thura (1)
  Paul Cisek (1)
  
  1. Groupe de Recherche sur le Système Nerveux Central (GRSNC), Department of Neurosciences, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, H3C 3J7, QC, Canada
  
• 刊物主题：Cognitive Psychology;
• 出版者：Springer US
• ISSN：1531-5320

文摘

In a recent report, Winkel, Keuken, van Maanen, Wagenmakers & Forstmann (Psychonomics Bulletin and Review 21(3): 777-84, 2014) show that during a random-dot motion discrimination task, early differences in motion evidence can influence reaction times (RTs) and error rates in human subjects. They use this as an argument in favor of the drift-diffusion model and against the urgency-gating model. However, their implementation of the urgency-gating model is incomplete, as it lacks the low-pass filter that is necessary to deal with noisy input such as the motion signal used in their experimental task. Furthermore, by focusing analyses solely on comparison of mean RTs they overestimate how long early information influences individual trials. Here, we show that if the urgency-gating model is correctly implemented, including a low-pass filter with a 250 ms time constant, it can successfully reproduce the results of the Winkel et al. experiment. Keywords Decision making Response time models Computational modeling Drift-diffusion model Perceptual discrimination