Haptic roughness perception of linear gratings via bare finger or rigid probe |
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Authors: | Lawrence Michael A Kitada Ryo Klatzky Roberta L Lederman Susan J |
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Institution: | Department of Psychology, Queen's University, Kingston, ON K7L 3N6, Canada. |
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Abstract: | The magnitude of perceived roughness was haptically estimated as subjects freely explored linear gratings with either the bare finger or a rigid stylus-shaped probe. A considerably expanded range of ridge and groove width was investigated, relative to the extant literature. The four experiments collectively indicate that, for both finger and probe-end effectors, the variance in the estimates of perceived roughness was predominantly predicted by a single parameter: groove width. The functions relating perceived roughness to groove width increased over a narrow band relative to the full range of values, then flattened. These data have archival values for models of roughness perception involving both direct and indirect touch. |
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