Ebbinghaus figures that deceive the eye do not necessarily deceive the hand

Abstract In support of the visual stream dissociation hypothesis, which states that distinct visual streams serve vision-for-perception and vision-for-action, visual size illusions were reported over 20 years ago to ‘deceive the eye but not the hand’. Ever since, inconclusive results and contradicto...

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Autores principales:	Hester Knol, Raoul Huys, Jean-Christophe Sarrazin, Andreas Spiegler, Viktor K. Jirsa
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f2027a6e232c498e9c5e05564a9f4fc7
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id	oai:doaj.org-article:f2027a6e232c498e9c5e05564a9f4fc7
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spelling	oai:doaj.org-article:f2027a6e232c498e9c5e05564a9f4fc72021-12-02T15:05:35ZEbbinghaus figures that deceive the eye do not necessarily deceive the hand10.1038/s41598-017-02925-42045-2322https://doaj.org/article/f2027a6e232c498e9c5e05564a9f4fc72017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02925-4https://doaj.org/toc/2045-2322Abstract In support of the visual stream dissociation hypothesis, which states that distinct visual streams serve vision-for-perception and vision-for-action, visual size illusions were reported over 20 years ago to ‘deceive the eye but not the hand’. Ever since, inconclusive results and contradictory interpretations have accumulated. Therefore, we investigated the effects of the Ebbinghaus figure on repetitive aiming movements with distinct dynamics. Participants performed a Fitts’ task in which Ebbinghaus figures served as targets. We systematically varied the three parameters which have been shown to influence the perceived size of the Ebbinghaus figure’s target circle, namely the size of the target, its distance to the context circles and the size of the context circles. This paper shows that movement is significantly affected by the context size, but, in contrast to perception, not by the other two parameters. This is especially prominent in the approach phase of the movement towards the target, regardless of the dynamics. To reconcile the findings, we argue that different informational variables are used for size perception and the visual control of movements irrespective of whether certain variables induce (perceptual) illusions.Hester KnolRaoul HuysJean-Christophe SarrazinAndreas SpieglerViktor K. JirsaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-17 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hester Knol Raoul Huys Jean-Christophe Sarrazin Andreas Spiegler Viktor K. Jirsa Ebbinghaus figures that deceive the eye do not necessarily deceive the hand
description	Abstract In support of the visual stream dissociation hypothesis, which states that distinct visual streams serve vision-for-perception and vision-for-action, visual size illusions were reported over 20 years ago to ‘deceive the eye but not the hand’. Ever since, inconclusive results and contradictory interpretations have accumulated. Therefore, we investigated the effects of the Ebbinghaus figure on repetitive aiming movements with distinct dynamics. Participants performed a Fitts’ task in which Ebbinghaus figures served as targets. We systematically varied the three parameters which have been shown to influence the perceived size of the Ebbinghaus figure’s target circle, namely the size of the target, its distance to the context circles and the size of the context circles. This paper shows that movement is significantly affected by the context size, but, in contrast to perception, not by the other two parameters. This is especially prominent in the approach phase of the movement towards the target, regardless of the dynamics. To reconcile the findings, we argue that different informational variables are used for size perception and the visual control of movements irrespective of whether certain variables induce (perceptual) illusions.
format	article
author	Hester Knol Raoul Huys Jean-Christophe Sarrazin Andreas Spiegler Viktor K. Jirsa
author_facet	Hester Knol Raoul Huys Jean-Christophe Sarrazin Andreas Spiegler Viktor K. Jirsa
author_sort	Hester Knol
title	Ebbinghaus figures that deceive the eye do not necessarily deceive the hand
title_short	Ebbinghaus figures that deceive the eye do not necessarily deceive the hand
title_full	Ebbinghaus figures that deceive the eye do not necessarily deceive the hand
title_fullStr	Ebbinghaus figures that deceive the eye do not necessarily deceive the hand
title_full_unstemmed	Ebbinghaus figures that deceive the eye do not necessarily deceive the hand
title_sort	ebbinghaus figures that deceive the eye do not necessarily deceive the hand
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f2027a6e232c498e9c5e05564a9f4fc7
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_version_	1718388804358766592

Ebbinghaus figures that deceive the eye do not necessarily deceive the hand

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