Effect of virtual reality video frame rate on visually induced motion sickness through electroencephalography measurement

• Main Authors: Suwandi, Galih Restu Fardian, Khotimah, Siti Nurul, Haryanto, Freddy, Suprijadi, Suprijadi
• Format: Conference Proceeding
• Language: English
• Subjects: Asthenopia; Brain; Electroencephalography; Frames per second; Frequency ranges; Helmet mounted displays; Motion sickness; Power spectral density; Video; Virtual reality
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0228169

Virtual reality (VR) technology is growing in the current era of the COVID-19 pandemic. However, the use of VR is causing problems for its users. Some symptoms, such as nausea, headache, and eye strain, are felt after using VR. These symptoms are called Visually Induced Motion Sickness (VIMS). This study used electroencephalography (EEG) to record participants’ brain activity changes when experiencing VIMS from VR videos with varying frame rates. Participants are given VR videos via head-mounted displays (HMD). In addition, the subject also filled out a simulator sickness questionnaire (SSQ) before and after being given a VR. The frame rate of VR videos varies by seven values: 15 fps, 30 fps, 45 fps, 60 fps, 75 fps, 90 fps, and 105 fps. Brain waves in the alpha frequency range (8 Hz-13 Hz) and low beta frequency (13 Hz-15 Hz) were analyzed through the power spectral density (PSD). The SSQ score increased after the participants watched the VR video. The scene score changes for each change in the video frame rate. A significant increase occurs when the frame rate is lowered to 15 fps and also when it is increased up to 105 fps. Power spectral density calculations show increased brain activity in the frontal and occipital areas when the frame rate changes. Meanwhile, there were no significant changes in the parietal and temporal brain lobes. The increase in activity is a sign that the VIMS symptoms felt by the subject are also increasing.