Fingertips are great sensors that can distinguish tiny differences in materials, such as a hair on a table or the polish of a metal surface. To artificially present tactile sensations in a realistic way, it is useful to know what sorts and ranges of properties of the physical environment to which humans are sensitive. In this talk, I will introduce some illusory "indistinguishable" tactile stimuli that are physically different from one another but perceptually the same. These illusions provide important clues for understanding the computational strategy of the tactile system. Understanding the human sensory system will lead to future information communication technology that can convey our rich sensations.
Human Information Science Laboratory