Enhancements of Vection in Depth from Viewpoint Oscillation: Effects of Field of View, Amplitude, Focal Distance and Body Posture. Zacher, J., Guterman, P., Palmisano, S., & Allison, R. In Journal of Vestibular Research (8th Symposium on the Role of the Vestibular Organs in Space Exploration), volume 21, pages 82. Houston, Texas, 04, 2011. abstract bibtex Incorporating jitter or oscillation of the vantage point in visual displays produces more compelling illusions of selfmotion (vection), despite generating greater sensory conflicts [1]. We are working with the Canadian Space Agency to develop an experiment to study this phenomenon on the International Space Station. Pragmatic issues favour small, near displays rather than typical immersive displays. This paper studies impact of display characteristics on the jitter/oscillation enhancement on vection. METHODS Visual displays simulated constant velocity forward motion at 1.33 m/s through a virtual world, or the same motion with simulated viewpoint oscillation, on a laptop monitor viewed through an aperture. Various experiments examined the effect of oscillation amplitude, direction, field of view (with a different monitor), focal distance and body posture on vection responses. RESULTS Adding simulated horizontal or vertical viewpoint oscillation to radial flow increased vection a similar amount. Vection strength was increased more for oscillation peak velocities of 0.28 m/s compared to 0.09 m/s. Increasing focal distance by the use of +2D ophthalmic lenses did not measurably impact reported strength of vection. While field of view had no effect, closer viewing distances reduced vection but had no significant effect on the oscillation enhancement. DISCUSSION Motion sickness and spatial disorientation continue to impact the availability and effectiveness of astronauts. The current results will guide the development of ISS studies to improve our understanding of how vestibular and visual signals are recalibrated in altered gravity. REFERENCES [1] Palmisano, S., Allison, R.S. and Pekin. (2008) Perception, 37, 22 – 33.
@incollection{Zacher2011,
abstract = {Incorporating jitter or oscillation of the vantage point in visual displays produces more compelling illusions of selfmotion (vection), despite generating greater sensory conflicts [1]. We are working with the Canadian Space Agency to develop an experiment to study this phenomenon on the International Space Station. Pragmatic issues favour small, near displays rather than typical immersive displays. This paper studies impact of display characteristics on the jitter/oscillation enhancement on vection.
METHODS
Visual displays simulated constant velocity forward motion at 1.33 m/s through a virtual world, or the same motion with simulated viewpoint oscillation, on a laptop monitor viewed through an aperture. Various experiments examined the effect of oscillation amplitude, direction, field of view (with a different monitor), focal distance and body posture on vection responses.
RESULTS
Adding simulated horizontal or vertical viewpoint oscillation to radial flow increased vection a similar amount. Vection strength was increased more for oscillation peak velocities of 0.28 m/s compared to 0.09 m/s. Increasing focal distance by the use of +2D ophthalmic lenses did not measurably impact reported strength of vection. While field of view had no effect, closer viewing distances reduced vection but had no significant effect on the oscillation enhancement.
DISCUSSION
Motion sickness and spatial disorientation continue to impact the availability and effectiveness of astronauts. The current results will guide the development of ISS studies to improve our understanding of how vestibular and visual signals are recalibrated in altered gravity.
REFERENCES
[1] Palmisano, S., Allison, R.S. and Pekin. (2008) Perception, 37, 22 -- 33.},
address = {Houston, Texas},
author = {Zacher, J.E. and Guterman, P.S. and Palmisano, S.A. and Allison, R.S.},
booktitle = {Journal of Vestibular Research (8th Symposium on the Role of the Vestibular Organs in Space Exploration)},
date-added = {2011-05-11 11:20:56 -0400},
date-modified = {2011-10-28 21:44:49 -0400},
keywords = {Optic flow & Self Motion (also Locomotion & Aviation)},
month = {04},
pages = {82},
title = {Enhancements of Vection in Depth from Viewpoint Oscillation: Effects of Field of View, Amplitude, Focal Distance and Body Posture},
volume = {21},
year = {2011}}
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METHODS Visual displays simulated constant velocity forward motion at 1.33 m/s through a virtual world, or the same motion with simulated viewpoint oscillation, on a laptop monitor viewed through an aperture. Various experiments examined the effect of oscillation amplitude, direction, field of view (with a different monitor), focal distance and body posture on vection responses. RESULTS Adding simulated horizontal or vertical viewpoint oscillation to radial flow increased vection a similar amount. Vection strength was increased more for oscillation peak velocities of 0.28 m/s compared to 0.09 m/s. Increasing focal distance by the use of +2D ophthalmic lenses did not measurably impact reported strength of vection. While field of view had no effect, closer viewing distances reduced vection but had no significant effect on the oscillation enhancement. DISCUSSION Motion sickness and spatial disorientation continue to impact the availability and effectiveness of astronauts. The current results will guide the development of ISS studies to improve our understanding of how vestibular and visual signals are recalibrated in altered gravity. REFERENCES [1] Palmisano, S., Allison, R.S. and Pekin. 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