Grasping discriminates between object sizes less not more accurately than the perceptual system

Frederic Göhringer; Miriam Löhr-Limpens; Constanze Hesse; Thomas Schenk

doi:10.3390/vision3030036

Grasping discriminates between object sizes less not more accurately than the perceptual system

Frederic Göhringer (Corresponding Author), Miriam Löhr-Limpens, Constanze Hesse, Thomas Schenk

Psychology

Ludwig Maximilian University of Munich

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

3 Citations (Scopus)

3 Downloads (Pure)

Abstract

Ganel, Freud, Chajut, and Algom (2012) demonstrated that maximum grip apertures (MGAs) differ significantly when grasping perceptually identical objects. From this finding they concluded that the visual size information used by the motor system is more accurate than the visual size information available to the perceptual system. A direct comparison between the accuracy in the perception and the action system is, however, problematic, given that accuracy in the perceptual task is measured using a dichotomous variable, while accuracy in the visuomotor task is determined using a continuous variable. We addressed this problem by dichotomizing the visuomotor measures. Using this approach, our results show that size discrimination in grasping is in fact inferior to perceptual discrimination therefore contradicting the original suggestion put forward by Ganel and colleagues.

Original language	English
Article number	36
Number of pages	15
Journal	Vision
Volume	3
Issue number	3
Early online date	19 Jul 2019
DOIs	https://doi.org/10.3390/vision3030036
Publication status	Published - Jul 2019

Bibliographical note

Funding: This work was supported by the DFG Priority Program SPP 1772 “Human performance under multiple cognitive task requirements: From basic mechanisms to optimized task scheduling” (DFG/SCHE 735/2-1) and also research funding from the following two projects: DFG/SCHE 735/3-1 und DFG/SCHE 735/4-1.

Acknowledgments: We want to thank Lara Werner and Regina Härtl for help in data acquisition.

Keywords

perception-action model
Two Visual Streams Hypothesis
grasping
object size
Just Noticeable Difference

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10.3390/vision3030036Licence: CC BY

Grasping Discriminates between Object Sizes Less Not More Accurately than the Perceptual System
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Final published version, 711 KBLicence: CC BY

Cite this

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title = "Grasping discriminates between object sizes less not more accurately than the perceptual system",

abstract = "Ganel, Freud, Chajut, and Algom (2012) demonstrated that maximum grip apertures (MGAs) differ significantly when grasping perceptually identical objects. From this finding they concluded that the visual size information used by the motor system is more accurate than the visual size information available to the perceptual system. A direct comparison between the accuracy in the perception and the action system is, however, problematic, given that accuracy in the perceptual task is measured using a dichotomous variable, while accuracy in the visuomotor task is determined using a continuous variable. We addressed this problem by dichotomizing the visuomotor measures. Using this approach, our results show that size discrimination in grasping is in fact inferior to perceptual discrimination therefore contradicting the original suggestion put forward by Ganel and colleagues.",

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author = "Frederic G{\"o}hringer and Miriam L{\"o}hr-Limpens and Constanze Hesse and Thomas Schenk",

note = "Funding: This work was supported by the DFG Priority Program SPP 1772 “Human performance under multiple cognitive task requirements: From basic mechanisms to optimized task scheduling” (DFG/SCHE 735/2-1) and also research funding from the following two projects: DFG/SCHE 735/3-1 und DFG/SCHE 735/4-1. Acknowledgments: We want to thank Lara Werner and Regina H{\"a}rtl for help in data acquisition.",

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N1 - Funding: This work was supported by the DFG Priority Program SPP 1772 “Human performance under multiple cognitive task requirements: From basic mechanisms to optimized task scheduling” (DFG/SCHE 735/2-1) and also research funding from the following two projects: DFG/SCHE 735/3-1 und DFG/SCHE 735/4-1. Acknowledgments: We want to thank Lara Werner and Regina Härtl for help in data acquisition.

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AB - Ganel, Freud, Chajut, and Algom (2012) demonstrated that maximum grip apertures (MGAs) differ significantly when grasping perceptually identical objects. From this finding they concluded that the visual size information used by the motor system is more accurate than the visual size information available to the perceptual system. A direct comparison between the accuracy in the perception and the action system is, however, problematic, given that accuracy in the perceptual task is measured using a dichotomous variable, while accuracy in the visuomotor task is determined using a continuous variable. We addressed this problem by dichotomizing the visuomotor measures. Using this approach, our results show that size discrimination in grasping is in fact inferior to perceptual discrimination therefore contradicting the original suggestion put forward by Ganel and colleagues.

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Grasping discriminates between object sizes less not more accurately than the perceptual system

Abstract

Bibliographical note

Keywords

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