Event-Based Referred Vibrotactile Feedback for Bare-Hand XR Interaction.

Area of Science:

• Human-Computer Interaction
• Virtual Reality
• Augmented Reality

Background:

• Existing haptic feedback devices for XR, such as controllers and gloves, require additional hardware, constrain natural hand movement, and can be cumbersome.
• There is a need for unobtrusive and accessible haptic feedback solutions that enhance bare-hand XR experiences without introducing extra equipment.

Purpose of the Study:

• To propose and evaluate event-based vibrotactile feedback delivered via commodity smartwatches as an accessible method for enhancing bare-hand XR interaction.
• To investigate the impact of wrist-based haptic feedback on user experience, task performance, and cognitive load in XR environments.

Main Methods:

• Developed an event-based vibrotactile feedback system using smartwatches to deliver discrete pulses during key manipulation moments in XR.
• Conducted two user studies with 26 participants to assess the effectiveness of the proposed feedback system in various XR tasks.
• Collected qualitative and quantitative data on user experience, task completion, and perceived usefulness of the haptic feedback.

Main Results:

• The proposed vibrotactile feedback significantly enhanced user experience, with 94% of participants finding it helpful.
• Feedback delivered to either wrist placement was effective, demonstrating flexibility in implementation.
• Haptic cues notably reduced visual attention demands, particularly beneficial for complex manipulation tasks like knob rotation.

Conclusions:

• Event-based vibrotactile feedback via smartwatches is an effective and accessible approach for improving bare-hand XR interaction.
• This method offers a practical alternative to traditional haptic devices, supporting natural hand movement and reducing the need for extra hardware.
• The findings provide design guidelines for integrating ubiquitous haptics into XR, promoting wider adoption of natural interaction paradigms.