Visually Guided Haptic Search

In this study, we investigate the influence of visual feedback on haptic exploration. A haptic search task was designed in which subjects had to haptically explore a virtual display using a force-feedback device and to determine whether a target was present among distractor items. Although the targe...

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Bibliographic Details
Published in:IEEE transactions on haptics 2010-01, Vol.3 (1), p.63-72
Main Authors: Plaisier, M.A., Kappers, A.M.L., Tiest, W.M.B., Ernst, M.O.
Format: Article
Language:English
Subjects:
Cameras
Delay
Displays
Feedback
Fingers
Haptic interfaces
Haptic search
Haptics
Layout
Minimally invasive surgery
Movements
perception
psychophysics
Searching
Serials
Shape control
Software
Studies
Tasks
Virtual environment
Visual
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Summary:In this study, we investigate the influence of visual feedback on haptic exploration. A haptic search task was designed in which subjects had to haptically explore a virtual display using a force-feedback device and to determine whether a target was present among distractor items. Although the target was recognizable only haptically, visual feedback of finger position or possible target positions could be given. Our results show that subjects could use visual feedback on possible target positions even in the absence of feedback on finger position. When there was no feedback on possible target locations, subjects scanned the whole display systematically. When feedback on finger position was present, subjects could make well-directed movements back to areas of interest. This was not the case without feedback on finger position, indicating that showing finger position helps to form a spatial representation of the display. In addition, we show that response time models of visual serial search do not generally apply for haptic serial search. Consequently, in teleoperation systems, for instance, it is helpful to show the position of the probe even if visual information on the scene is poor.
ISSN:1939-1412
2329-4051
DOI:10.1109/TOH.2009.43