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We propose extending the concept of spatial constancy to haptic perception. In vision, spatial constancy refers to the conversion of retinotopic signals into spatiotopic representations, allowing the observer to perceive space independently of his or her own eye movements, or at least partly so. The problem would seem at least as important in haptic perception, where sensory surfaces undergo even...
In the present study, blindfolded subjects had to explore differently shaped objects with two hands and to judge their volume. The results showed a significant effect of the shape of objects on their perceived volume. Additional analysis showed that this effect could not be explained by the subjects' tendency to base the volume judgment on a specific object dimension other than the volume itself....
This paper presents a preliminary study on a new vibrotactile rendering method which can make smoother directional vibrotactile flows on a thin plate. Both by actuating two piezoelectric actuators sequentially from one side to the opposite side and by controlling amplitude-modulated input excitation frequency from zero to the 1st mode of the resonant frequency of a thin plate, a user can feel a smoother...
Viscous friction or damping for rotatory switches is a mechanical parameter for the torque caused by the angular velocity and crucial to human haptic perception. The detection threshold (DT) and just noticeable difference (JND) for this mechanical parameter was measured. The JND was determined for a standard stimulus of 2 mNms. The DT and JND were investigated for two knob sizes and under the presence...
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