Synchronous facial action binds dynamic facial features

Abstract We asked how dynamic facial features are perceptually grouped. To address this question, we varied the timing of mouth movements relative to eyebrow movements, while measuring the detectability of a small temporal misalignment between a pair of oscillating eyebrows—an eyebrow wave. We found...

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Main Authors:	Alan Johnston, Ben B. Brown, Ryan Elson
Format:	article
Language:	EN
Published:	Nature Portfolio 2021
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/22c7c8c93e3a48a2b2a4c2aebabd0af1
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spelling	oai:doaj.org-article:22c7c8c93e3a48a2b2a4c2aebabd0af12021-12-02T14:23:23ZSynchronous facial action binds dynamic facial features10.1038/s41598-021-86725-x2045-2322https://doaj.org/article/22c7c8c93e3a48a2b2a4c2aebabd0af12021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86725-xhttps://doaj.org/toc/2045-2322Abstract We asked how dynamic facial features are perceptually grouped. To address this question, we varied the timing of mouth movements relative to eyebrow movements, while measuring the detectability of a small temporal misalignment between a pair of oscillating eyebrows—an eyebrow wave. We found eyebrow wave detection performance was worse for synchronous movements of the eyebrows and mouth. Subsequently, we found this effect was specific to stimuli presented to the right visual field, implicating the involvement of left lateralised visual speech areas. Adaptation has been used as a tool in low-level vision to establish the presence of separable visual channels. Adaptation to moving eyebrows and mouths with various relative timings reduced eyebrow wave detection but only when the adapting mouth and eyebrows moved asynchronously. Inverting the face led to a greater reduction in detection after adaptation particularly for asynchronous facial motion at test. We conclude that synchronous motion binds dynamic facial features whereas asynchronous motion releases them, allowing adaptation to impair eyebrow wave detection.Alan JohnstonBen B. BrownRyan ElsonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alan Johnston Ben B. Brown Ryan Elson Synchronous facial action binds dynamic facial features
description	Abstract We asked how dynamic facial features are perceptually grouped. To address this question, we varied the timing of mouth movements relative to eyebrow movements, while measuring the detectability of a small temporal misalignment between a pair of oscillating eyebrows—an eyebrow wave. We found eyebrow wave detection performance was worse for synchronous movements of the eyebrows and mouth. Subsequently, we found this effect was specific to stimuli presented to the right visual field, implicating the involvement of left lateralised visual speech areas. Adaptation has been used as a tool in low-level vision to establish the presence of separable visual channels. Adaptation to moving eyebrows and mouths with various relative timings reduced eyebrow wave detection but only when the adapting mouth and eyebrows moved asynchronously. Inverting the face led to a greater reduction in detection after adaptation particularly for asynchronous facial motion at test. We conclude that synchronous motion binds dynamic facial features whereas asynchronous motion releases them, allowing adaptation to impair eyebrow wave detection.
format	article
author	Alan Johnston Ben B. Brown Ryan Elson
author_facet	Alan Johnston Ben B. Brown Ryan Elson
author_sort	Alan Johnston
title	Synchronous facial action binds dynamic facial features
title_short	Synchronous facial action binds dynamic facial features
title_full	Synchronous facial action binds dynamic facial features
title_fullStr	Synchronous facial action binds dynamic facial features
title_full_unstemmed	Synchronous facial action binds dynamic facial features
title_sort	synchronous facial action binds dynamic facial features
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/22c7c8c93e3a48a2b2a4c2aebabd0af1
work_keys_str_mv	AT alanjohnston synchronousfacialactionbindsdynamicfacialfeatures AT benbbrown synchronousfacialactionbindsdynamicfacialfeatures AT ryanelson synchronousfacialactionbindsdynamicfacialfeatures
_version_	1718391414648209408

Synchronous facial action binds dynamic facial features

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