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The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside

To avoid collisions, pedestrians depend on their ability to perceive and interpret the visual motion of other road users. Eye movements influence motion perception, yet pedestrians’ gaze behavior has been little investigated. In the present study, we ask whether observers sample visual information d...

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Autores principales: Sudkamp, Jennifer, Bocian, Mateusz, Souto, David
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8640052/
https://www.ncbi.nlm.nih.gov/pubmed/34857779
http://dx.doi.org/10.1038/s41598-021-02412-x
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author Sudkamp, Jennifer
Bocian, Mateusz
Souto, David
author_facet Sudkamp, Jennifer
Bocian, Mateusz
Souto, David
author_sort Sudkamp, Jennifer
collection PubMed
description To avoid collisions, pedestrians depend on their ability to perceive and interpret the visual motion of other road users. Eye movements influence motion perception, yet pedestrians’ gaze behavior has been little investigated. In the present study, we ask whether observers sample visual information differently when making two types of judgements based on the same virtual road-crossing scenario and to which extent spontaneous gaze behavior affects those judgements. Participants performed in succession a speed and a time-to-arrival two-interval discrimination task on the same simple traffic scenario—a car approaching at a constant speed (varying from 10 to 90 km/h) on a single-lane road. On average, observers were able to discriminate vehicle speeds of around 18 km/h and times-to-arrival of 0.7 s. In both tasks, observers placed their gaze closely towards the center of the vehicle’s front plane while pursuing the vehicle. Other areas of the visual scene were sampled infrequently. No differences were found in the average gaze behavior between the two tasks and a pattern classifier (Support Vector Machine), trained on trial-level gaze patterns, failed to reliably classify the task from the spontaneous eye movements it elicited. Saccadic gaze behavior could predict time-to-arrival discrimination performance, demonstrating the relevance of gaze behavior for perceptual sensitivity in road-crossing.
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spelling pubmed-86400522021-12-06 The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside Sudkamp, Jennifer Bocian, Mateusz Souto, David Sci Rep Article To avoid collisions, pedestrians depend on their ability to perceive and interpret the visual motion of other road users. Eye movements influence motion perception, yet pedestrians’ gaze behavior has been little investigated. In the present study, we ask whether observers sample visual information differently when making two types of judgements based on the same virtual road-crossing scenario and to which extent spontaneous gaze behavior affects those judgements. Participants performed in succession a speed and a time-to-arrival two-interval discrimination task on the same simple traffic scenario—a car approaching at a constant speed (varying from 10 to 90 km/h) on a single-lane road. On average, observers were able to discriminate vehicle speeds of around 18 km/h and times-to-arrival of 0.7 s. In both tasks, observers placed their gaze closely towards the center of the vehicle’s front plane while pursuing the vehicle. Other areas of the visual scene were sampled infrequently. No differences were found in the average gaze behavior between the two tasks and a pattern classifier (Support Vector Machine), trained on trial-level gaze patterns, failed to reliably classify the task from the spontaneous eye movements it elicited. Saccadic gaze behavior could predict time-to-arrival discrimination performance, demonstrating the relevance of gaze behavior for perceptual sensitivity in road-crossing. Nature Publishing Group UK 2021-12-02 /pmc/articles/PMC8640052/ /pubmed/34857779 http://dx.doi.org/10.1038/s41598-021-02412-x Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Sudkamp, Jennifer
Bocian, Mateusz
Souto, David
The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
title The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
title_full The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
title_fullStr The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
title_full_unstemmed The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
title_short The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
title_sort role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8640052/
https://www.ncbi.nlm.nih.gov/pubmed/34857779
http://dx.doi.org/10.1038/s41598-021-02412-x
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