RayFlex: Inducing Weight Perception Through Raycast Pseudo-Haptics in Virtual Reality.

Area of Science:

• Virtual Reality (VR) and Human-Computer Interaction (HCI)
• Haptic Feedback and Perceptual Simulation
• Computer Graphics and Real-time Rendering

Background:

• Virtual object weight perception is crucial for realistic VR interactions.
• Existing pseudo-haptic techniques are limited to near-field, direct hand interactions.
• Remote object interactions are increasingly common in advanced VR systems, yet weight perception for these is underexplored.

Purpose of the Study:

• To introduce and evaluate a novel pseudo-haptic technique (RayFlex) for conveying object weight in raycasting-based VR interactions.
• To investigate the effectiveness of RayFlex in enhancing weight discrimination and user experience in remote VR interactions.
• To provide design implications and guidelines for future VR systems incorporating remote weight perception.

Main Methods:

• Development of RayFlex, a pseudo-haptic technique utilizing visual displacement and dynamic ray deformation to simulate object weight.
• Conducting two user studies to evaluate RayFlex's effectiveness in weight discrimination and its impact on user experience.
• Assessing perceived realism, presence, satisfaction, and usability across different interaction contexts.

Main Results:

• RayFlex significantly improved perceived realism and user presence in VR.
• The technique enhanced user satisfaction and maintained usability during remote object interactions.
• RayFlex demonstrated effectiveness in supporting weight discrimination for virtual objects in raycasting-based interactions.

Conclusions:

• RayFlex successfully introduces pseudo-haptic weight perception into remote VR interactions, enhancing immersion and realism.
• The findings provide valuable insights and practical guidelines for designing more engaging and believable VR experiences.
• Further research can build upon RayFlex to explore more sophisticated remote haptic feedback mechanisms.