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Perceptual decisions are biased by the cost to act.

Hagura, N; Haggard, P; Diedrichsen, J; (2017) Perceptual decisions are biased by the cost to act. Elife , 6 , Article e18422. 10.7554/eLife.18422. Green open access

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Abstract

Perceptual decisions are classically thought to depend mainly on the stimulus characteristics, probability and associated reward. However, in many cases, the motor response is considered to be a neutral output channel that only reflects the upstream decision. Contrary to this view, we show that perceptual decisions can be recursively influenced by the physical resistance applied to the response. When participants reported the direction of the visual motion by left or right manual reaching movement with different resistances, their reports were biased towards the direction associated with less effortful option. Repeated exposure to such resistance on hand during perceptual judgements also biased subsequent judgements using voice, indicating that effector-dependent motor costs not only biases the report at the stage of motor response, but also changed how the sensory inputs are transformed into decisions. This demonstrates that the cost to act can influence our decisions beyond the context of the specific action.

Type: Article
Title: Perceptual decisions are biased by the cost to act.
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.7554/eLife.18422
Publisher version: http://dx.doi.org/10.7554/eLife.18422
Additional information: © 2017, Hagura et al. This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.
Keywords: Action, decision making, diffusion model, effort, human, neuroscience, perception
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 > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
URI: http://discovery.ucl.ac.uk/id/eprint/1542861
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