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Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight
We explored the effect of gravity on the perceived representation of the absolute distance of objects to the observers within the range from 1.5–6 m. Experiments were performed on board the CNES Airbus Zero-G during parabolic flights eliciting repeated exposures to short periods of microgravity (0 g...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4963113/ https://www.ncbi.nlm.nih.gov/pubmed/27463106 http://dx.doi.org/10.1371/journal.pone.0159422 |
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author | Clément, Gilles Loureiro, Nuno Sousa, Duarte Zandvliet, Andre |
author_facet | Clément, Gilles Loureiro, Nuno Sousa, Duarte Zandvliet, Andre |
author_sort | Clément, Gilles |
collection | PubMed |
description | We explored the effect of gravity on the perceived representation of the absolute distance of objects to the observers within the range from 1.5–6 m. Experiments were performed on board the CNES Airbus Zero-G during parabolic flights eliciting repeated exposures to short periods of microgravity (0 g), hypergravity (1.8 g), and normal gravity (1 g). Two methods for obtaining estimates of perceived egocentric distance were used: verbal reports and visually directed motion toward a memorized visual target. For the latter method, because normal walking is not possible in 0 g, blindfolded subjects translated toward the visual target by pulling on a rope with their arms. The results showed that distance estimates using both verbal reports and blind pulling were significantly different between normal gravity, microgravity, and hypergravity. Compared to the 1 g measurements, the estimates of perceived distance using blind pulling were shorter for all distances in 1.8 g, whereas in 0 g they were longer for distances up to 4 m and shorter for distances beyond. These findings suggest that gravity plays a role in both the sensorimotor system and the perceptual/cognitive system for estimating egocentric distance. |
format | Online Article Text |
id | pubmed-4963113 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-49631132016-08-08 Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight Clément, Gilles Loureiro, Nuno Sousa, Duarte Zandvliet, Andre PLoS One Research Article We explored the effect of gravity on the perceived representation of the absolute distance of objects to the observers within the range from 1.5–6 m. Experiments were performed on board the CNES Airbus Zero-G during parabolic flights eliciting repeated exposures to short periods of microgravity (0 g), hypergravity (1.8 g), and normal gravity (1 g). Two methods for obtaining estimates of perceived egocentric distance were used: verbal reports and visually directed motion toward a memorized visual target. For the latter method, because normal walking is not possible in 0 g, blindfolded subjects translated toward the visual target by pulling on a rope with their arms. The results showed that distance estimates using both verbal reports and blind pulling were significantly different between normal gravity, microgravity, and hypergravity. Compared to the 1 g measurements, the estimates of perceived distance using blind pulling were shorter for all distances in 1.8 g, whereas in 0 g they were longer for distances up to 4 m and shorter for distances beyond. These findings suggest that gravity plays a role in both the sensorimotor system and the perceptual/cognitive system for estimating egocentric distance. Public Library of Science 2016-07-27 /pmc/articles/PMC4963113/ /pubmed/27463106 http://dx.doi.org/10.1371/journal.pone.0159422 Text en © 2016 Clément et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Clément, Gilles Loureiro, Nuno Sousa, Duarte Zandvliet, Andre Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight |
title | Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight |
title_full | Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight |
title_fullStr | Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight |
title_full_unstemmed | Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight |
title_short | Perception of Egocentric Distance during Gravitational Changes in Parabolic Flight |
title_sort | perception of egocentric distance during gravitational changes in parabolic flight |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4963113/ https://www.ncbi.nlm.nih.gov/pubmed/27463106 http://dx.doi.org/10.1371/journal.pone.0159422 |
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