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Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/6835
Title: Isolating the effects of vection and optokinetic nystagmus on visually induced motion sickness during exposure to optokinetic stimuli
Authors: Ji, Ting Ting
So, Richard H. Y.
Cheung, Raymond T. F.
Keywords: Cybersickness
Motion sickness
VR
Virtual reality
Human factors
VIMS
Vection
OKN
Nausea
Issue Date: Oct-2009
Citation: Human factors, v. 51, no. 5, October 2009, p. 739-751
Abstract: This study investigates isolated effects of vection and optokinetic nystagmus (OKN) on visually induced motion sickness (VIMS) provoked by rotating optokinetic drum patterns. Background: VIMS was the subject of recent standardization activities (ISO IWA3, 2005) but the effects of OKN have not been studied in the absence of vection. Method: Experiment one suppressed OKN by eye fixation and examined VIMS severity (both ordinal and ratio scale) and time spent in saturated vection at four pattern rotating velocities of 0, 2, 14, and 34 degrees per second (dps). Experiment two suppressed vection by adding a peripheral visual field rotating in the opposite direction to the rotating patterns. VIMS severity and OKN slow-phase velocity were studied at four rotating velocities of 0, 30, 60, and 90 dps. Results: Results from Experiment one indicated that VIMS severity increased as the pattern velocity increased from 0 dps to 34 dps. Results from Experiment two indicated that as the velocity of the rotating pattern increased, the slow-phase velocity (SPV) of OKN and the severity of VIMS increased and peaked in the 60 dps condition. In both experiments, ratio-scaled nausea data significantly correlated with ordinal-scaled nausea ratings. Conclusion: VIMS can still occur in the absence of either vection or OKN. Interestingly, the profile of the summed results of the two experiments matches nicely with the profile reported by Hu et al. (1989) in which neither OKN nor vection were controlled. Application: Potential applications include modeling and reduction of VIMS in computer gaming environments.
Rights: Human Factors © Copyright (2009) Sage.
URI: http://hdl.handle.net/1783.1/6835
Appears in Collections:IELM Journal/Magazine Articles

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