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Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading
We examined both the sufficiency of the optic-flow velocity field and the influence of optic-flow information beyond the velocity field on the active control of heading. The display simulated a vehicle traveling on a circular path through a random-dot 3D cloud under a static or a dynamic scene in wh...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
SAGE Publications
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5393814/ http://dx.doi.org/10.1068/ic210 |
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author | Li, Li Stone, Leland S. Chen, Jing |
author_facet | Li, Li Stone, Leland S. Chen, Jing |
author_sort | Li, Li |
collection | PubMed |
description | We examined both the sufficiency of the optic-flow velocity field and the influence of optic-flow information beyond the velocity field on the active control of heading. The display simulated a vehicle traveling on a circular path through a random-dot 3D cloud under a static or a dynamic scene in which dots were periodically redrawn to remove information beyond a velocity field. Participants used a joystick, under either velocity and acceleration control dynamics, to steer and align the vehicle orientation with their perceived heading while experiencing random perturbations to the vehicle orientation. Frequency response (Bode) plots show reasonably good performance under both display conditions with a decrease in gain and an increase in phase lag for the dynamic scene for both control dynamics. The performance data were then fit by a Crossover Model to identify reaction time and lead time constant to determine how much participants anticipated future heading to generate lead control. Reaction time was longer and lead time constant was smaller for the dynamic than the static scene for both control dynamics. We conclude that the velocity field alone is sufficient to support closed-loop heading control, but optic-flow information beyond the velocity field improves visuomotor performance in self-motion control. |
format | Online Article Text |
id | pubmed-5393814 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | SAGE Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-53938142017-04-24 Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading Li, Li Stone, Leland S. Chen, Jing Iperception Article We examined both the sufficiency of the optic-flow velocity field and the influence of optic-flow information beyond the velocity field on the active control of heading. The display simulated a vehicle traveling on a circular path through a random-dot 3D cloud under a static or a dynamic scene in which dots were periodically redrawn to remove information beyond a velocity field. Participants used a joystick, under either velocity and acceleration control dynamics, to steer and align the vehicle orientation with their perceived heading while experiencing random perturbations to the vehicle orientation. Frequency response (Bode) plots show reasonably good performance under both display conditions with a decrease in gain and an increase in phase lag for the dynamic scene for both control dynamics. The performance data were then fit by a Crossover Model to identify reaction time and lead time constant to determine how much participants anticipated future heading to generate lead control. Reaction time was longer and lead time constant was smaller for the dynamic than the static scene for both control dynamics. We conclude that the velocity field alone is sufficient to support closed-loop heading control, but optic-flow information beyond the velocity field improves visuomotor performance in self-motion control. SAGE Publications 2011-05-01 2011-05 /pmc/articles/PMC5393814/ http://dx.doi.org/10.1068/ic210 Text en © 2011 SAGE Publications Ltd. Manuscript content on this site is licensed under Creative Commons Licenses http://creativecommons.org/licenses/by-nc-nd/3.0/ This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License (http://www.creativecommons.org/licenses/by-nc-nd/3.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access page (http://www.uk.sagepub.com/aboutus/openaccess.htm). |
spellingShingle | Article Li, Li Stone, Leland S. Chen, Jing Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading |
title | Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading |
title_full | Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading |
title_fullStr | Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading |
title_full_unstemmed | Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading |
title_short | Influence of Optic-Flow Information Beyond the Velocity Field on the Active Control of Heading |
title_sort | influence of optic-flow information beyond the velocity field on the active control of heading |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5393814/ http://dx.doi.org/10.1068/ic210 |
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