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Type: Journal article
Title: Evaluating balance recovery techniques for users wearing head-mounted display in VR
Author: Tirado Cortes, C.A.
Chen, H.
Sturnieks, D.
Garcia Marin, J.
Lord, S.
Lin, C.-T.
Citation: IEEE Transactions on Visualization and Computer Graphics, 2021; 204(1):204-215
Publisher: IEEE Computer Society
Issue Date: 2021
ISSN: 1077-2626
Statement of
Carlos A. Tirado Cortes , Hsiang-Ting Chen , Daina L. Sturnieks, Jaime Garcia, Stephen R. Lord and Chin-Teng Lin
Abstract: Room-scale 3D position tracking allows users to explore the virtual environment by physically walking. However, since the eyesight of the user is blocked by a Head-Mounted Display (HMD), the user might lose her balance because of bumping into real-world obstacles or shifting the body weight onto virtual objects that are inexistent in the real-world. This paper investigates assistive fall recovery methods under the assumption that the onset of the fall is given. Our experiment simulated the forward loss-of-balance with a tether-release protocol. A magnetic lock attached to a counter-weight was released while the subject was in a static leaning posture and engaged in a secondary 3D object selection task. The experiment uses a two by two design that examines two assistive techniques, i.e. video-see-through and auditory warning, at two different timing, i.e. fall onset and 500ms prior to onset. The data from 17 subjects show that the video-see-through triggered 500ms before the onset of fall can effectively help users recover from falls. Surprisingly, the video-see-through at the fall onset has a significant negative impact on the fall recovery providing similar results to the baseline condition (no intervention).
Keywords: VR; fall; balance
Rights: © 2019 IEEE.
DOI: 10.1109/tvcg.2019.2927477
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