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Two experiments tested young adults' ability to discriminate the direction of friction-defined textural gradients rendered by the Senseg FeelScreen™. Gradients were particularly effective when they spanned the low end of the intensity range. This trend likely reflects saturation of the device's rendering capabilities at high intensities, as confirmed by measurements with a manual linear tribometer...
Haptic interfaces controlled by a single fingertip or hand-held probe tend to display surface features individually, requiring serial search for multiple features. Novel surface haptic devices, however, have the potential to provide displays to multiple fingertips simultaneously, affording the possibility of parallel search. Using variable-friction surface haptic devices, we investigated the ability...
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