Dissociating the influence of perceptual biases and contextual artefacts within target configurations during the planning and control of visually-guided action

Roberts, James W. and Gerber, N and Wakefield, Caroline and Simmonds, P (2021) Dissociating the influence of perceptual biases and contextual artefacts within target configurations during the planning and control of visually-guided action. Motor Control, 25 (3). pp. 349-368. ISSN 1087-1640

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Abstract

The failure of perceptual illusions to elicit corresponding biases within movement supports the view of two visual pathways separately contributing to perception and action. However, several alternative findings may contest this overarching framework. The present study aimed to examine the influence of perceptual illusions within the planning and control of aiming. To achieve this, we manipulated and measured the planning/control phases by respectively perturbing the target illusion (relative size-contrast illusion; Ebbinghaus/Titchener circles) following movement onset and detecting the spatiotemporal characteristics of the movement trajectory. The perceptual bias that was indicated by the perceived target size estimates failed to correspondingly manifest within the effective target size. While movement time (specifically, time after peak velocity) was affected by the target configuration, this outcome was not consistent with the direction of the perceptual illusions. These findings advocate an influence of the surrounding contextual information (e.g., annuli) on movement control that is independent of the direction predicted by the illusion.

Item Type:	Article
Additional Information and Comments:	This is the accepted manuscript version of an article that was published in the journal Motor Control, available online from: https://doi.org/10.1123/mc.2020-0054
Faculty / Department:	Faculty of Human and Digital Sciences > School of Health and Sport Sciences
Depositing User:	Caroline Wakefield
Date Deposited:	01 Mar 2021 11:54
Last Modified:	30 May 2022 13:27
URI:	https://hira.hope.ac.uk/id/eprint/3246

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