The effect of incongruent delay on guided haptic training

Virtual Reality (VR) technology has great potential as a tool for training. Remote haptic virtual environments (VE) allow multiple users to interact in the same virtual space to accomplish tasks. Combining these ideas, it is possible to apply a remote VE to connect skilled trainers with remote trainees for training. In this paper we examined guided haptic training as an interaction method where one user guides another user through a VR simulation. We considered interaction with virtual soft objects, which were pressed and deformed. Within a remote VE for guided haptic training, network factors such as delay could influence how the guided user perceives object softness. In this paper, we examined how incongruent delays between the streams of visual and haptic information affect this perception. We found that when haptic information was delayed 133.33 ms beyond visual information there was a statistically significant difference in the perception of object softness. These preliminary observations can be used to locate a threshold for applying to future remote guided VE training tools.

[1]  Hermann J. Müller,et al.  Effects of Packet Loss and Latency on the Temporal Discrimination of Visual-Haptic Events , 2010, IEEE Transactions on Haptics.

[2]  Eckehard Steinbach,et al.  On the compression and rendering of event-triggered force transients in networked virtual environments , 2009, 2009 IEEE International Workshop on Haptic Audio visual Environments and Games.

[3]  Alejandro García-Alonso,et al.  Simultaneous remote haptic collaboration for assembling tasks , 2007, Multimedia Systems.

[4]  Charles T. Loop,et al.  Smooth Subdivision Surfaces Based on Triangles , 1987 .

[5]  Frank Tendick,et al.  Haptic guidance: experimental evaluation of a haptic training method for a perceptual motor skill , 2002, Proceedings 10th Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems. HAPTICS 2002.

[6]  Matthias Harders,et al.  Influence of visual and haptic delays on stiffness perception in augmented reality , 2009, 2009 8th IEEE International Symposium on Mixed and Augmented Reality.

[7]  Antoine Widmer,et al.  Effects of the Alignment Between a Haptic Device and Visual Display on the Perception of Object Softness , 2010, IEEE Transactions on Systems, Man, and Cybernetics - Part A: Systems and Humans.

[8]  R H LaMotte,et al.  Softness discrimination with a tool. , 2000, Journal of neurophysiology.

[9]  Manuel Menezes de Oliveira Neto,et al.  Transatlantic Touch: A Study of Haptic Collaboration over Long Distance , 2004, Presence: Teleoperators & Virtual Environments.

[10]  B. Prabhakaran,et al.  Streaming 3D shape deformations in collaborative virtual environment , 2010, 2010 IEEE Virtual Reality Conference (VR).

[11]  Peter Xiaoping Liu,et al.  A Collaborative Virtual Haptic Environment for Surgical Training and Tele-Mentoring , 2007, Int. J. Robotics Autom..