HAPTIC GUIDANCES INCREASE THE VISUO-MANUAL TRACKING OF JAPANESE AND ARABIC LETTERS Jeremy Bluteau, Edouard Gentaz, Sabine Coquillart, Yohan Payan Poster Last modified: 2008‐05‐13
Abstract Hap!c guidance by a force feedback device is a technology which provides addi!onal propriocep!ve cues during visuo‐motor learning tasks. The effects of two types of hap!c guidance ‐ control in posi!on (HGP) or in force (HGF) – on visuo‐manual tracking (“following”) of trajectories are s!ll under debate. Three training techniques of hap!c guidance (HGP, HGF or NHG control condi!on without hap!c guidance) were evaluated. Movements produced by adults were assessed in terms of shapes (dynamic !me warping) and kinema!cs criteria (number of velocity peaks and mean velocity) before and a8er the training sessions. Trajectories consisted of two Arabic and two Japanese‐inspired le;ers. Results revealed both types of hap!c guidance do not influence the shape quality, mainly guided by visual feedbacks. Moreover, the use of HGF globally improves the fluidity of the four movements while no significant improvement was found for HGP or NHG.. These results suggest that learned informa!on for this specific motor ac!vity could be stored as internal inverse model andencoded in force coordinates.
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