Visually induced motion sickness (VIMS) is evoked by conflicting motion sensory signals within the brain. Use of the simulator sickness questionnaire (SSQ) or postural stability measures to quantify one's VIMS experience only measures the changes between pre- and post-experiment. The motion sickness susceptibility questionnaire (MSSQ) is widely used to measure individual's sensitivity to motion sickness, but its applicability to VIMS has not been proven. We are introducing a novel VIMS susceptibility measure by combining measures of the subject's "sensitivity" and "endurance" to VIMS. The proposed VIMS susceptibility measure was tested for various VIMS inducing conditions, and demonstrated its effectiveness by conducting both between-subjects and within-subject comparisons for different VIMS conditions.
Visually induced motion sickness (VIMS) is frequently reported with stereo and VR display systems. We tested whether VIMS can be detected by off-the-shelve wearable electrophysiology devices, where the VIMS were induced by driving in the virtual world. Our data indicates that 1) the correlation between blood pressure and heart rate, and 2) the changes of mean gravity frequencies in TP9Delta and FP1Theta, and 3) the changes of SDs in TP9Alpha and TP10Alpha of the EEG signals may be possible candidates of the VIMS onset indicator. However, it is still hard to conclude that those physiological signals can be used as definitive VIMS indicators because our analysis only differentiates the physiological response to VIMS vs. non-VIMS, not the detection of VIMS onset, nor estimation of VIMS severity in real-time.