Lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.

Many perceptual decision making models posit that participants accumulate noisy evidence over time to improve the accuracy of their decisions, and that in free response tasks, participants respond when the accumulated evidence reaches a decision threshold. Research on the neural correlates of these...

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Autores principales: Marieke K van Vugt, Patrick Simen, Leigh Nystrom, Philip Holmes, Jonathan D Cohen
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Publicado: Public Library of Science (PLoS) 2014
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Acceso en línea:https://doaj.org/article/b88514367f4a4bf8949048afbfffdce1
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spelling oai:doaj.org-article:b88514367f4a4bf8949048afbfffdce12021-11-18T08:28:18ZLateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.1932-620310.1371/journal.pone.0090943https://doaj.org/article/b88514367f4a4bf8949048afbfffdce12014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24625827/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Many perceptual decision making models posit that participants accumulate noisy evidence over time to improve the accuracy of their decisions, and that in free response tasks, participants respond when the accumulated evidence reaches a decision threshold. Research on the neural correlates of these models' components focuses primarily on evidence accumulation. Far less attention has been paid to the neural correlates of decision thresholds, reflecting the final commitment to a decision. Inspired by a model of bistable neural activity that implements a decision threshold, we reinterpret human lateralized readiness potentials (LRPs) as reflecting the crossing of a decision threshold. Interestingly, this threshold crossing preserves signatures of a drift-diffusion process of evidence accumulation that feeds in to the threshold mechanism. We show that, as our model predicts, LRP amplitudes and growth rates recorded while participants performed a motion discrimination task correlate with individual differences in behaviorally-estimated prior beliefs, decision thresholds and evidence accumulation rates. As such LRPs provide a useful measure to test dynamical models of both evidence accumulation and decision commitment processes non-invasively.Marieke K van VugtPatrick SimenLeigh NystromPhilip HolmesJonathan D CohenPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 3, p e90943 (2014)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Marieke K van Vugt
Patrick Simen
Leigh Nystrom
Philip Holmes
Jonathan D Cohen
Lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.
description Many perceptual decision making models posit that participants accumulate noisy evidence over time to improve the accuracy of their decisions, and that in free response tasks, participants respond when the accumulated evidence reaches a decision threshold. Research on the neural correlates of these models' components focuses primarily on evidence accumulation. Far less attention has been paid to the neural correlates of decision thresholds, reflecting the final commitment to a decision. Inspired by a model of bistable neural activity that implements a decision threshold, we reinterpret human lateralized readiness potentials (LRPs) as reflecting the crossing of a decision threshold. Interestingly, this threshold crossing preserves signatures of a drift-diffusion process of evidence accumulation that feeds in to the threshold mechanism. We show that, as our model predicts, LRP amplitudes and growth rates recorded while participants performed a motion discrimination task correlate with individual differences in behaviorally-estimated prior beliefs, decision thresholds and evidence accumulation rates. As such LRPs provide a useful measure to test dynamical models of both evidence accumulation and decision commitment processes non-invasively.
format article
author Marieke K van Vugt
Patrick Simen
Leigh Nystrom
Philip Holmes
Jonathan D Cohen
author_facet Marieke K van Vugt
Patrick Simen
Leigh Nystrom
Philip Holmes
Jonathan D Cohen
author_sort Marieke K van Vugt
title Lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.
title_short Lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.
title_full Lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.
title_fullStr Lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.
title_full_unstemmed Lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.
title_sort lateralized readiness potentials reveal properties of a neural mechanism for implementing a decision threshold.
publisher Public Library of Science (PLoS)
publishDate 2014
url https://doaj.org/article/b88514367f4a4bf8949048afbfffdce1
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AT patricksimen lateralizedreadinesspotentialsrevealpropertiesofaneuralmechanismforimplementingadecisionthreshold
AT leighnystrom lateralizedreadinesspotentialsrevealpropertiesofaneuralmechanismforimplementingadecisionthreshold
AT philipholmes lateralizedreadinesspotentialsrevealpropertiesofaneuralmechanismforimplementingadecisionthreshold
AT jonathandcohen lateralizedreadinesspotentialsrevealpropertiesofaneuralmechanismforimplementingadecisionthreshold
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