Gaze when reaching to grasp a glass

Journal of Vision
Dimitris VoudourisEli Brenner

Abstract

People have often been reported to look near their index finger's contact point when grasping. They have only been reported to look near the thumb's contact point when grasping an opaque object at eye height with a horizontal grip-thus when the region near the index finger's contact point is occluded. To examine to what extent being able to see the digits' final trajectories influences where people look, we compared gaze when reaching to grasp a glass of water or milk that was placed at eye or hip height. Participants grasped the glass and poured its contents into another glass on their left. Surprisingly, most participants looked nearer to their thumb's contact point. To examine whether this was because gaze was biased toward the position of the subsequent action, which was to the left, we asked participants in a second experiment to grasp a glass and either place it or pour its contents into another glass either to their left or right. Most participants' gaze was biased to some extent toward the position of the next action, but gaze was not influenced consistently across participants. Gaze was also not influenced consistently across the experiments for individual participants-even for those who participated in both experiment...Continue Reading

References

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Jan 15, 2016·PloS One·Dimitris VoudourisEli Brenner
Jan 29, 2016·Journal of Vision·Anna BelardinelliMartin V Butz

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Citations

Mar 10, 2019·Experimental Brain Research·Simon Grant, Miriam L Conway
Dec 12, 2019·Journal of Vision·Evan Cesanek, Fulvio Domini
Dec 5, 2019·Frontiers in Bioengineering and Biotechnology·Valentina GregoriArjan Gijsberts
Aug 28, 2020·Journal of Neurophysiology·Alexander GoettkerDimitris Voudouris
Oct 23, 2020·Perception·Irene A KulingEli Brenner
Jan 7, 2021·Experimental Brain Research·Prajith SivakumarJody C Culham

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