Virtual button illusion

What is it about?

How can we feel that a button moves when we press on it? A common explanation is that we feel that the button move because we feel that our finger move. Our brains operate differently. Our skin is very sensitive to the vibrations of the objects we touch. When objects have a mobility that is too small to be detected, our brains infer that our fingers move if the touched objects give evidence of movement through their vibrations, even if they do not move. We can use this effect to create virtual buttons on the glass face of tactile screens.

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