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Issue No.01 - January-March (2010 vol.3)
pp: 63-72
Astrid M.L. Kappers , Universiteit Utrecht, Utrecht
Wouter M. Bergmann Tiest , Universiteit Utrecht, Utrecht
Marc O. Ernst , Max Planck Institute for Biological Cybernetics, Tuebingen
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.
Haptic search, psychophysics, perception.
Astrid M.L. Kappers, Wouter M. Bergmann Tiest, Marc O. Ernst, "Visually Guided Haptic Search", IEEE Transactions on Haptics, vol.3, no. 1, pp. 63-72, January-March 2010, doi:10.1109/TOH.2009.43
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