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Proceedings Paper

Can observers exploit enhanced-disparity information to control reaching movements within telepresence environments?
Author(s): Mark F. Bradshaw; Paul B. Hibbard; Rob van der Willigen; Simon J. Watt; Ian R. L. Davies; Neil S. Stringer; Nick Beagley; Andrew R. Willis
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Paper Abstract

The control of inter-camera distance (ICD) can be used to change the range of binocular disparities available from a visual scene viewed remotely. Binocular disparity is considered pre-eminent in the control of reaching behavior. One reason for this is that once suitably scaled it can specify metrical depth relationships within a scene. Such information is necessary in order to plan the transport and grasped phase of a reaching movement. However whether an observer can take advantage of enhanced disparities to control reaching is unknown. Here we examine the effects of manipulating ICD on reaching movements with ICDs ranging from 6.5cm to 26cm. Typically sized, real world objects were placed in a scene and reaching performance was assessed. An experimental sequence consisted of three blocks. The first and last block used a normal ICD/IOD of 6.5cm whereas the middle block used an increased ICD. Larger than normal ICD were found to disrupt reaching performance, with slower peak velocities and smaller grip apertures being observed. This was more pronounced for unfamiliar objects. Little evidence for learning was found.

Paper Details

Date Published: 3 May 2000
PDF: 9 pages
Proc. SPIE 3957, Stereoscopic Displays and Virtual Reality Systems VII, (3 May 2000); doi: 10.1117/12.384450
Show Author Affiliations
Mark F. Bradshaw, Univ. of Surrey (United Kingdom)
Paul B. Hibbard, Univ. of Surrey (United Kingdom)
Rob van der Willigen, Univ. of Surrey (United Kingdom)
Simon J. Watt, Univ. of Surrey (United Kingdom)
Ian R. L. Davies, Univ. of Surrey (United Kingdom)
Neil S. Stringer, Univ. of Surrey (United Kingdom)
Nick Beagley, Defence Evaluation and Research Agency Farnborough (United Kingdom)
Andrew R. Willis, Defence Evaluation and Research Agency Farnborough (United Kingdom)

Published in SPIE Proceedings Vol. 3957:
Stereoscopic Displays and Virtual Reality Systems VII
John O. Merritt; Mark T. Bolas; Stephen A. Benton; Andrew J. Woods; Mark T. Bolas, Editor(s)

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