The factor structure of cybersickness
Cybersickness embraces a range of clinical symptoms reported in response to simulated motion in a computer generated, virtual reality environment. The Simulator Sickness Questionnaire (SSQ) has been the standard tool for measuring observed responses; however, many of the observed SSQ variables are highly correlated, so it is not clear which ones are appropriate to use as a basis for building an explanatory model. In this study, responses to the SSQ were analyzed using principal components analysis, and four significant factors  general cybersickness, vision, arousal and fatigue  were identified. An initial interpretation of these factors is provided in the context of a broader cybersickness model, with a view to constructing a new questionnaire with fewer, more focused questions.
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