Abstract
To investigate the effects of adjacent stimuli on roughness perception and human uniformity of feeling, the magnitude of perceptual roughness on the middle finger was measured under several conditions in which different roughness stimuli on the index and ring fingers were presented. The magnitude of the roughness perceived on the middle finger depended on the stimuli on the adjacent fingers. We describe a multiple roughness perception model with an averaging mechanism for tactile sensation of the fingers. In addition, we found that uniform visual stimulus enhanced tactile uniformity.
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