Motor cost influences perceptual decisions
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- dc.contributor.author Marcos Sanmartín, Encarnica
- dc.contributor.author Cos Aguilera, Ignasica
- dc.contributor.author Girard, Benoîtca
- dc.contributor.author Verschure, Paul F. M. J.ca
- dc.date.accessioned 2016-05-18T14:57:01Z
- dc.date.available 2016-05-18T14:57:01Z
- dc.date.issued 2015
- dc.description.abstract Perceptual decision making has been widely studied using tasks in which subjects are asked to discriminate a visual stimulus and instructed to report their decision with a movement. In these studies, performance is measured by assessing the accuracy of the participants’ choices as a function of the ambiguity of the visual stimulus. Typically, the reporting movement is considered as a mere means of reporting the decision with no influence on the decision-making process. However, recent studies have shown that even subtle differences of biomechanical costs between movements may influence how we select between them. Here we investigated whether this purely motor cost could also influence decisions in a perceptual discrimination task in detriment of accuracy. In other words, are perceptual decisions only dependent on the visual stimulus and entirely orthogonal to motor costs? Here we show the results of a psychophysical experiment in which human subjects were presented with a random dot motion discrimination task and asked to report the perceived motion direction using movements of different biomechanical cost. We found that the pattern of decisions exhibited a significant bias towards the movement of lower cost, even when this bias reduced performance accuracy. This strongly suggests that motor costs influence decision making in visual discrimination tasks for which its contribution is neither instructed nor beneficial.en
- dc.description.sponsorship This work was supported by the EU FP7 framework under grant agreements no FP7-ICT-270108 - Goal-Leaders, FP7-ICT-270212 - eSMC and ERC-341196 - CDAC (PV) and Ville de Paris HABOT-Project grant (IC & BG).en
- dc.format.mimetype application/pdfca
- dc.identifier.citation Marcos E, Cos I, Girard B, Verschure PFMJ. Motor cost influences perceptual decisions. PLoS ONE. 2015;10(12):e0144841. doi: 10.1371/journal.pone.0144841en
- dc.identifier.doi http://dx.doi.org/10.1371/journal.pone.0144841
- dc.identifier.issn 1932-6203
- dc.identifier.uri http://hdl.handle.net/10230/26295
- dc.language.iso engen
- dc.publisher Public Library of Science (PLoS)en
- dc.relation.ispartof PLoS ONE. 2015;10(12):e0144841en
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/270108
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/270212
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/341196
- dc.rights © 2015 Marcos et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en
- dc.rights.accessRights info:eu-repo/semantics/openAccess
- dc.rights.uri http://creativecommons.org/licenses/by/4.0/
- dc.subject.keyword Decision makingen
- dc.subject.keyword Visionen
- dc.subject.keyword Musculoskeletal systemen
- dc.subject.keyword Sensory perceptionen
- dc.subject.keyword Ellipsesen
- dc.subject.keyword Cognitionen
- dc.subject.keyword Elbowen
- dc.subject.keyword Shouldersen
- dc.title Motor cost influences perceptual decisionsen
- dc.type info:eu-repo/semantics/article
- dc.type.version info:eu-repo/semantics/publishedVersion