| Summary: | 碩士 === 國立高雄師範大學 === 體育學系 === 107 === This study explored the relationship between the incidence of motion sickness, the severity of motion sickness, and posture control in different control mode (head/hand) in a virtual reality head-mounted display. Twenty males (21.32 ± 1.69 years old) and 20 female (21.95 ± 3.39 years old) were recruited as participants. They were required to wear a Virtual Reality HMD and play Space Simulation (EVERSPACETM) for up to 20 minutes in either the head control or the hand control mode in a sitting position. Magnetic motion tracker system was used to collect data on their linear and angular body movement. Participants filled in the Simulator Sickness Symptom Questionnaire (SSQ) before (SSQ) and after (SSQ2 or SSQ3) exposure to the game, and according to their response to the yes/ no question of whether they were motion sick of SSQ2 or SSQ3, they were divided into the Sick or the Well group. The incidence of motion sickness in the group of head control was 25%, and that in the group of hand control was 35%. There was no difference in the incidence of motion sickness between the two groups, χ2 = 0.476, p > .05. In terms of symptom of motion sickness, significant differences were found between the Sick and Well groups in the hand control mode. There was no significant difference in posture control between the Sick and Well group before exposure; however, postural control variability was different between the Sick and Well groups. The results confirm that the control method did not affect the incidence of motion sickness, but exposure to HMD can cause physical discomfort and demonstrate that changes in body sway precede the onset of subjective symptoms of motion sickness.
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