Inhibitory Control in Mind and Brain: An Interactive Race Model of Countermanding Saccades

The stop-signal task has been used to study normal cognitive control and clinical dysfunction. Its utility is derived from a race model that accounts for performance and provides an estimate of the time it takes to stop a movement. This model posits a race between go and stop processes with stochast...

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Bibliographic Details
Published inPsychological review Vol. 114; no. 2; pp. 376 - 397
Main Authors Boucher, Leanne, Palmeri, Thomas J, Logan, Gordon D, Schall, Jeffrey D
Format Journal Article
LanguageEnglish
Published United States American Psychological Association 01.04.2007
Subjects
Brain
Brain - physiology
Cognition
Cognitive Processes
Eye Movements
Humans
Inhibition
Inhibition (Psychology)
Reaction Time
Saccades - physiology
Signal Detection, Psychological
Stochastic Processes
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Summary:The stop-signal task has been used to study normal cognitive control and clinical dysfunction. Its utility is derived from a race model that accounts for performance and provides an estimate of the time it takes to stop a movement. This model posits a race between go and stop processes with stochastically independent finish times. However, neurophysiological studies demonstrate that the neural correlates of the go and stop processes produce movements through a network of interacting neurons. The juxtaposition of the computational model with the neural data exposes a paradox--how can a network of interacting units produce behavior that appears to be the outcome of an independent race? The authors report how a simple, competitive network can solve this paradox and provide an account of what is measured by stop-signal reaction time.
ISSN:0033-295X
DOI:10.1037/0033-295x.114.2.376