Effects of visual illusions on grasping

Volker H. Franz; Heinrich H. Bülthoff; Heinrich Bulthoff; Karl R. Gegenfurtner

doi:10.1037//0096-1523.27.5.1124

Effects of visual illusions on grasping

Volker H. Franz, Heinrich H. Bülthoff, Heinrich Bulthoff, Karl R. Gegenfurtner

Research output: Contribution to journal › Article › peer-review

Abstract

In 2 experiments, the Müller-Lyer illusion (F. C. Müller-Lyer, 1889; N = 16) and the parallel-lines illusion (W. Wundt, 1898; N = 26) clearly affected maximum preshape aperture in grasping (both ps < .001). The grasping effects were similar but not perfectly equal to the perceptual effects. Control experiments show that these differences can be attributed to problems in matching the perceptual task and the grasping task. A model is described stating the assumptions that are needed to compare the grasping effects and the perceptual effects of visual illusions. Further studies on the relationship between perception and grasping are reviewed. These studies provide no clear evidence for a dissociation between perception and grasping and therefore do not support the action versus perception hypothesis (A. D. Milner & M. A. Goodale, 1995).

Original language	English
Pages (from-to)	1124-1144
Number of pages	21
Journal	Journal of Experimental Psychology: Human Perception and Performance
Volume	27
Issue number	5
DOIs	https://doi.org/10.1037//0096-1523.27.5.1124
Publication status	Published - 2001 Oct 1
Externally published	Yes

ASJC Scopus subject areas

Cognitive Neuroscience
Experimental and Cognitive Psychology

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abstract = "In 2 experiments, the M{\"u}ller-Lyer illusion (F. C. M{\"u}ller-Lyer, 1889; N = 16) and the parallel-lines illusion (W. Wundt, 1898; N = 26) clearly affected maximum preshape aperture in grasping (both ps < .001). The grasping effects were similar but not perfectly equal to the perceptual effects. Control experiments show that these differences can be attributed to problems in matching the perceptual task and the grasping task. A model is described stating the assumptions that are needed to compare the grasping effects and the perceptual effects of visual illusions. Further studies on the relationship between perception and grasping are reviewed. These studies provide no clear evidence for a dissociation between perception and grasping and therefore do not support the action versus perception hypothesis (A. D. Milner & M. A. Goodale, 1995).",

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AU - Bulthoff, Heinrich

AU - Gegenfurtner, Karl R.

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AB - In 2 experiments, the Müller-Lyer illusion (F. C. Müller-Lyer, 1889; N = 16) and the parallel-lines illusion (W. Wundt, 1898; N = 26) clearly affected maximum preshape aperture in grasping (both ps < .001). The grasping effects were similar but not perfectly equal to the perceptual effects. Control experiments show that these differences can be attributed to problems in matching the perceptual task and the grasping task. A model is described stating the assumptions that are needed to compare the grasping effects and the perceptual effects of visual illusions. Further studies on the relationship between perception and grasping are reviewed. These studies provide no clear evidence for a dissociation between perception and grasping and therefore do not support the action versus perception hypothesis (A. D. Milner & M. A. Goodale, 1995).

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Effects of visual illusions on grasping

Abstract

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