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

Abstract 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 info...

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Autores principales:	Jennifer Sudkamp, Mateusz Bocian, David Souto
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d45388acaa344570a1f4ba30c1b17388
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spelling	oai:doaj.org-article:d45388acaa344570a1f4ba30c1b173882021-12-05T12:14:19ZThe role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside10.1038/s41598-021-02412-x2045-2322https://doaj.org/article/d45388acaa344570a1f4ba30c1b173882021-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02412-xhttps://doaj.org/toc/2045-2322Abstract 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.Jennifer SudkampMateusz BocianDavid SoutoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jennifer Sudkamp Mateusz Bocian David Souto The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
description	Abstract 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.
format	article
author	Jennifer Sudkamp Mateusz Bocian David Souto
author_facet	Jennifer Sudkamp Mateusz Bocian David Souto
author_sort	Jennifer Sudkamp
title	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_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_sort	role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d45388acaa344570a1f4ba30c1b17388
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The role of eye movements in perceiving vehicle speed and time-to-arrival at the roadside

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