Object visibility, not energy expenditure, accounts for spatial biases in human grasp selection

Maiello, Guido, Paulun, Vivian C., Klein, Lina K. and Fleming, Roland W. (2019) Object visibility, not energy expenditure, accounts for spatial biases in human grasp selection. i-Perception, 10 (1). (doi:10.1177/2041669519827608).

Record type: Article

Abstract

Humans exhibit spatial biases when grasping objects. These biases may be due to actors attempting to shorten their reaching movements and therefore minimize energy expenditures. An alternative explanation could be that they arise from actors attempting to minimize the portion of a grasped object occluded from view by the hand. We reanalyze data from a recent study, in which a key condition decouples these two competing hypotheses. The analysis reveals that object visibility, not energy expenditure, most likely accounts for spatial biases observed in human grasping.

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Accepted/In Press date: 9 January 2019

e-pub ahead of print date: 24 February 2019

Additional Information: Funding Information: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by the DFG (IRTG-1901: ‘‘The Brain in Action’’ and SFB-TRR-135: ‘‘Cardinal Mechanisms of Perception’’) and an ERC Consolidator Award (ERC-2015-CoG-682859: ‘‘SHAPE’’). Guido Maiello was supported by a Marie-Sklodowska-Curie Actions Individual Fellowship (H2020-MSCA-IF-2017: ‘‘VisualGrasping’’ Project ID: 793660).

Keywords: minimum energy, movement distance, object visibility, perception/action, Precision grip, reaching/grasping, visuo-haptic interactions

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