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Subjective and objective metrics of evaluating cybersickness in virtual environment

Cybersickness is a common side effect of being in a virtual reality environment, and it can be explained as a consequence of vestubulo- oculomotor mismatch in humans. This effect is also known as vection (the feeling of pseudo movement), where a person has an illusory feeling of movement while being stationary. Movement nausea has been investigated since flight simulators in the 1990s by using Kennedys Simulator Sickness Questionnaire (SSQ). Nowdays, various questionnaires are being used to subjectively evaluate cybersickness, feeling of presence in the virtual environment and generally questionnaires to access user experience. In addition to questionnaires, objective metrics are used to identify various changes in a person’s physiological state. These physiological changes include changes in sweating, changes in heart rate, blood pressure, breathing and changes which can be observed on a brain wave measuring device (EEG). With the parallel use of subjective and objective metrics, it is possible to gain much better insight into cybersickness and to observe which elements of virtual reality need to be addressed in order to reduce the effect of cybersickness.

subjective metrics, objective metrics, evaluation, cybersickness

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