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

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

Research output: Contribution to journalArticle

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 languageEnglish
Article number36
Number of pages15
JournalVision
Volume3
Issue number3
Early online date19 Jul 2019
DOIs
Publication statusPublished - Jul 2019

Keywords

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

Cite this

Grasping discriminates between object sizes less not more accurately than the perceptual system. / Göhringer, Frederic (Corresponding Author); Löhr-Limpens, Miriam; Hesse, Constanze; Schenk, Thomas.

In: Vision, Vol. 3, No. 3, 36, 07.2019.

Research output: Contribution to journalArticle

Göhringer, Frederic ; Löhr-Limpens, Miriam ; Hesse, Constanze ; Schenk, Thomas. / Grasping discriminates between object sizes less not more accurately than the perceptual system. In: Vision. 2019 ; Vol. 3, No. 3.
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