{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T10:54:50Z","timestamp":1791111290418,"version":"4.1.0"},"reference-count":35,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2009,10,1]],"date-time":"2009-10-01T00:00:00Z","timestamp":1254355200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Hum Factors"],"published-print":{"date-parts":[[2009,10]]},"abstract":"<jats:p> Objective: 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, but the effects of OKN have not been studied in the absence of vection. Method: Experiment 1 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 2 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 1 indicated that VIMS severity increased as the pattern velocity increased from 0 dps to 34 dps. Results from Experiment 2 indicated that as the velocity of the rotating pattern increased, the slow-phase velocity 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. in which neither OKN nor vection were controlled. Application: Potential applications include modeling and reduction of VIMS in computer gaming environments. <\/jats:p>","DOI":"10.1177\/0018720809349708","type":"journal-article","created":{"date-parts":[[2009,11,18]],"date-time":"2009-11-18T04:29:21Z","timestamp":1258518561000},"page":"739-751","source":"Crossref","is-referenced-by-count":63,"title":["Isolating the Effects of Vection and Optokinetic Nystagmus on Optokinetic Rotation-Induced Motion Sickness"],"prefix":"10.1177","volume":"51","author":[{"given":"Jennifer T. T.","family":"Ji","sequence":"first","affiliation":[{"name":"Hong Kong University of Science and Technology, Hong Kong SAR,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard H. Y.","family":"So","sequence":"additional","affiliation":[{"name":"Hong Kong University of Science and Technology, Hong Kong SAR"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raymond T. F.","family":"Cheung","sequence":"additional","affiliation":[{"name":"University of Hong Kong, Hong Kong SAR"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2009,11,17]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00234474"},{"key":"atypb2","doi-asserted-by":"crossref","unstructured":"Buttner, U. & Buttner-Ennever, J.A. (1988). Present concepts of oculomotor organization. In J. A. Buttner-Ennever (Ed.), Neuroanatomy of the oculomotor system (pp. 1-42). 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( 2007). Photosensitive epilepsy and image safety. In So, R. H. Y., Cheung, R. , Chow, E., Ji, J. T. T., and Lam, A. (Eds.), Proceedings of the First International Symposium on Visually Induced Motion Sickness, Fatigue, and Photosensitive Epileptic Seizures (VIMS2007) (pp. 43-48). 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