開始時刻
前のセッションの直後
136. Locomotion in Virtual Environments
発表数
4
時間
2分30秒
発表担当
目次
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Doorways Do Not Always Cause Forgetting: Studying the Effect of Locomotion Technique and Doorway Visualization in Virtual Reality
説明
The “doorway effect” predicts that crossing an environmental boundary affects memory negatively. In virtual reality (VR), we can design the crossing and the appearance of such boundaries in non-realistic ways. However, it is unclear whether locomotion techniques like teleportation, which avoid crossing the boundary altogether, still induce the effect. Furthermore, it is unclear how different appearances of a doorway act as a boundary and thus induce the effect. To address these questions, we conducted two lab studies. First, we conceptually replicated prior doorway effect studies in VR using natural walking and teleportation. Second, we investigated the effect of five doorway visualizations, ranging from doors to portals. The results show no difference in object recognition performance due to the presence of a doorway, locomotion technique, or doorway visualization. We discuss the implications of these findings on the role of boundaries in event-based memory and the design of boundary interactions in VR.
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Investigating Virtual Reality Locomotion Techniques with Blind People
説明
Many Virtual Reality (VR) locomotion techniques have been proposed, but those explored for and with blind people are often custom-made or require specialized equipment. Consequently, it is unclear how popular techniques can support blind people's VR locomotion, blocking access to most VR experiences. We implemented three popular techniques -- Arm Swinging, Linear Movement (joystick-based steering), and Point & Teleport -- with minor adaptations for accessibility. We conducted a study with 14 blind participants consisting of navigation tasks with these techniques and a semi-structured interview. We found no differences in overall performance (e.g., completion time), but contrasting preferences. Findings highlight the challenges and advantages of each technique and participants’ strategies. We discuss, among others, how augmenting the techniques enabled blind people to navigate in VR, the greater control of movement of Arm Swinging, the simplicity and familiarity of Linear Movement, and the potential for efficiency and for scanning the environment of Point & Teleport.
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The Effect of Spatial Audio on Curvature Gains in VR Redirected Walking
説明
Redirected walking (RDW) is a technique that allows users to navigate larger physical spaces in virtual reality (VR) environments by manipulating the users' view of the virtual world. In this study, we investigate the effect of adding spatial audio elements to curvature gains in RDW aiming to increase the perceptual threshold for the manipulation and allowing for higher levels of unnoticed redirection. We conducted a user study (n = 18), evaluating perceptual thresholds across conditions with and without spatial audio elements across different curvature gains. We found that spatial audio can significantly increase thresholds with a large effect size. This finding indicates the value of spatial audio for RDW. It could facilitate higher levels of redirection, while maintaining a convincing experience, leading to more freedom to navigate virtual environments in even smaller physical spaces.
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Stacked Retargeting: Combining Redirected Walking and Hand Redirection to Expand Haptic Retargeting's Coverage
説明
We present Stacked Retargeting—combining haptic retargeting and redirected walking—to maximise the use of passive proxy objects for VR haptics. Haptic retargeting work to date has considered stationary reaching and grasping interactions, and this inherently limits a proxy object’s scope. We consider exactly where this reaching and grasping occurs from, to increase the potential of each proxy. We present (a) a staged approach to implementing Stacked Retargeting, (b) five redirected walking approaches that enable users to arrive anywhere at the site of interaction, and (c) a usability magnitude estimation evaluation of these techniques. We demonstrate how Stacked Retargeting can meaningfully increase the practical use of proxy objects for VR haptics without degrading the user experience.
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