A very well-known example of tactile “gaps” between perception and reality is called the “Rubber-Hand Illusion.” In this so-called trick, a person is seated at a table with one hand resting in front of them, while the other is out of sight behind a divider. A fake hand is set down in front of the person in place of the outof-sight hand, so they have what looks more or less like their two hands resting on the table, except that one of them isn’t theirs (which of course they’re aware of). Then the “experimenter” begins lightly brushing the fingers of the hidden real hand and the fake visible
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