Abstract:Abstract. In this work, we investigate how local shape elements of a grasped object affect performance of haptic rotation. Blindfolded participants were asked to grasp a rotary knob using thumb and index finger and to rotate it 90 degrees counterclockwise around its own axis. The knobs exhibited a suitably distributed "grasp conform" combination of local shape elements (edged, flat or round). We tested all possible scenarios where both fingers had to grasp one of the three shape elements, resulting in a total … Show more
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