Affects of Perceived-Actions within Virtual Environments on User Behavior on the Outside

3D visualization has witnessed exponential growth driven by advances in computer-generated imagery that now include immersive technologies enabling first-person experiences with depth perception and spatial awareness. We investigated two popular uses of VR in 3D architectural visualization: a “passive walkthrough” vs. an “interactive walkthrough”. We designed a within-subject experiment to measure the user-perceived quality and conduct a behavior analysis of users in both experiences. All participants (N=34) were exposed to both conditions and afterwards responded to a post-experience questionnaire. We recorded the physical activity of all participants while they were immersed within the virtual environments and each session was logged in a time diary. So far QoE measurements have relied on subjective and objective evaluations. In this paper, we discuss the behavioral analysis of the effects of immersion and interaction on the simple active behaviors (movements + gestures) of the users. We apply quantitative behavioral observation to cross-examine user behavior against their self-reported responses to a “presence” questionnaire. We conclude that there is significant potential for applying cross-disciplinary behavior analysis tools to overall Quality of Experience within virtual environments.