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Prior physical exertion modulates allocentric distance perception: a demonstration of task-irrelevant cross-modal transfer

Clark, EV; Ward, NS; Kuppuswamy, A; (2016) Prior physical exertion modulates allocentric distance perception: a demonstration of task-irrelevant cross-modal transfer. Experimental Brain Research , 234 (8) pp. 2363-2367. 10.1007/s00221-016-4641-5. Green open access

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Abstract

Physical exertion has been previously shown to influence distance perception in the egocentric framework. In this study, we show that physical exertion influences allocentric distance perception. Twenty healthy volunteers made allocentric line length estimates following varying levels of physical exertion. Each participant was presented with 30 different line lengths ranging from 1 to 12 cm, and each length was presented three times. Each line presentation was preceded by the participant exerting one of the following three levels of their maximal voluntary force (MVF): 20, 50, or 80 % MVF using their hand in the pinch force task. Psychometric curves were obtained for the lines perceived as 'long' following each of the three force levels. Lines that were perceived as 'short' following 20 and 50 % MVF were perceived as 'long' following 80 % MVF; that is, there was a significant leftward shift in the psychometric curve following 80 % MVF when compared to 20 and 50 % MVF. Here, we demonstrate that physical exertion influences perception of distances in the allocentric framework. We discuss our findings with respect to cross-modal interactions, fatigue physiology, peri- and extra-personal space interactions.

Type: Article
Title: Prior physical exertion modulates allocentric distance perception: a demonstration of task-irrelevant cross-modal transfer
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s00221-016-4641-5
Publisher version: http://dx.doi.org/10.1007/s00221-016-4641-5
Language: English
Additional information: © The Author(s) 2016. Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Keywords: Allocentric, Distance estimation, Perception, Physical exertion
UCL classification: UCL
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: https://discovery.ucl.ac.uk/id/eprint/1481556
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