I already wrote some more general lines about the Eurohaptics 2014 conference. In this post I will highlight some contributions I consider important for the design of task-specific haptic interfaces.
Meta-Study about Force-Feedback in Surgery
Weber and Schneider from the German Aerospace Center (DLR) investigated the effect of kinaesthetic feedback in surgical task by performing a meta-analysis of 21 studies . They found large effects on average and peak forces and moderate effects on task accurarcy but no effect on task completion time. These results are consistent to the findings of Nitsch and Färber . With a stereoscopic visual feedback, the effect of kinaesthetic feedback decreases for task accurarcy, but remains basically the same for the application of forces. Although not included in the paper, the presenting author confirmed, that effects were reduced when experienced surgeons performed the task compared to novice users with minimal training.
Accessible Areas of Tablet Computers
Wolf et al. investigated, which areas can be accessed by different fingers when holding a tablet computer with both hands . These information can be used for the placement of virtual and real buttons in such or similar setups.
Onset time for haptic feedback
Kangas et al. investigated the maximum time span between the input of a user and the onset of the haptic feedback acknowledging the input . In a basic search and select task, they found 200 ms to be a maximum value for the onset time, before haptic feedback becomes more disturbing than helpful.
Despite these topics, there were a large number of other interesting contributions at the conference, especially regarding the modeling and displaying of tactile information. However, the results are either more complicated (i.e. depending on a large number of parameter and experiment conditions) or with very narrow application space (i.e. usage of a certain haptic display), that I choose not to mention them in this post. If you are interested in these topics, a thorough study of the proceedings of the conference is highly recommended.
- Weber, B. & Schneider, S.: The Effects of Force Feedback on Surgical Task Performance: A Meta-analytical Integration. Proceedings of Eurohaptics 2014, Versailles
- Nitsch, V. & Färber, B.: A Meta-Analysis of the Effects of Haptic Interfaces on Task Performance with Teleoperation Systems IEEE Transactions on Haptics, IEEE, 2012, 6, 387-398, DOI: 10.1109/ToH.2012.62
- Wolf, K.; Schleicher, R. and Rohs, M.: Touch Accessibility on the Front and the Back of held Tablet Devices. Proceedings of Eurohaptics 2014, Versailles
- Kangas, J.; Rantala, J.; Akkil, D.; Isokoski, P.; Majaranta, P.; and Raisamo, R.: Delayed Haptic Feedback to Gaze Gestures. Proceedings of Eurohaptics 2014, Versailles