The nauseogenicity of two methods of navigating within a virtual environment

This study compared the nauseogenicity of two different strategies for expl oring virtual environments whilst wearing an immersive head-mounted display . In the first, the head was kept still and movement was achieved solely by manipulating a hand-control. In the second, the subject was free (and enco uraged) to move his or her head when exploring the virtual world. Fourteen subjects completed both of the 20 min trials, three further subjects withdr ew from the study after one trial. Subjects reported increases in adverse s ymptoms when using each strategy and, for the group as a whole, nausea incr eased steadily during each immersion period. However, significantly larger changes were reported when the head moved than when it was still, as predic ted from sensory conflict theory. (C) 1998 Published by Elsevier Science Lt d. All rights reserved.