UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

The Neurodynamic Decision Variable in Human Multialternative Perceptual Choice

Kohl, C; Spieser, L; Forster, B; Bestmann, S; Yarrow, K; (2018) The Neurodynamic Decision Variable in Human Multialternative Perceptual Choice. Journal of Cognitive Neuroscience 10.1162/jocn_a_01347. (In press). Green open access

[img]
Preview
Text
Bestmann_ExtractPage1.pdf - ["content_typename_Accepted version" not defined]

Download (1MB) | Preview

Abstract

The neural dynamics underpinning binary perceptual decisions and their transformation into actions are well studied, but real-world decisions typically offer more than two response alternatives. How does decision-related evidence accumulation dynamically influence multiple action representations in humans? The heightened conservatism required in multiple compared with binary choice scenarios suggests a mechanism that compensates for increased uncertainty when multiple choices are present by suppressing baseline activity. Here, we tracked action representations using corticospinal excitability during four- and two-choice perceptual decisions and modeled them using a sequential sampling framework. We found that the predictions made by leaky competing accumulator models to accommodate multiple choices (i.e., reduced baseline activity to compensate increased uncertainty) were borne out by dynamic changes in human action representations. This suggests a direct and continuous influence of interacting evidence accumulators, each favoring a different decision alternative, on downstream corticospinal excitability during complex choice.

Type: Article
Title: The Neurodynamic Decision Variable in Human Multialternative Perceptual Choice
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1162/jocn_a_01347
Publisher version: https://doi.org/10.1162/jocn_a_01347
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: accumulator model, Hicks’ law, leaky competing accumulator, motor evoked potentials, multi-alternative decision-making
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Movement Neurosciences
URI: http://discovery.ucl.ac.uk/id/eprint/10058106
Downloads since deposit
14Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item