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Proceedings Paper

Spatial awareness in immersive virtual environments revealed in open-loop walking
Author(s): Kathleen A. Turano; Sidhartha Chaudhury
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Paper Abstract

As we move, we receive feedback from environmental information and internal self-motion cues (proprioception). This co-variation serves to calibrate our action system with respect to the environment and is integral in allowing us to know where we are within a body-scaled space. While the calibration established in the real world is robust enough to support walking without vision to a previously seen target, we propose that the action system needs to be recalibrated when scenes are from a virtual environment (VE). We will present results from experiments where subjects walked without vision to targets in briefly displayed scenes from virtual and real environments. The only available feedback from external sources was a single beep emitted at the end of a trial, implicitly signaling the target distance. Unlike performance in the real world, in the initial trials within the VE, subjects’ egocentric reference frame shifted in concert with the changing scene context. Over time, subjects became less dependent on the unreliable scene context and performance in the VE approached that in the real world. The change in behavior over time is consistent with subjects adopting a more consistent external cue (the beep) to calibrate their action systems. Supported by NIH EY07839 to KAT.

Paper Details

Date Published: 18 March 2005
PDF: 8 pages
Proc. SPIE 5666, Human Vision and Electronic Imaging X, (18 March 2005); doi: 10.1117/12.610854
Show Author Affiliations
Kathleen A. Turano, Wilmer Eye Institute (United States)
Sidhartha Chaudhury, Wilmer Eye Institute (United States)

Published in SPIE Proceedings Vol. 5666:
Human Vision and Electronic Imaging X
Bernice E. Rogowitz; Thrasyvoulos N. Pappas; Scott J. Daly, Editor(s)

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