A supposed paranormal ability to perceive things outside normal sensory awareness, like telepathy or clairvoyance.
From Greek 'kryptos' (hidden) + 'aesthesia' (sensation/perception), literally meaning 'hidden sensation,' coined in early 20th-century parapsychology.
Scientists studying cryptaesthesia in the 1930s-50s ran some of history's first rigorous experiments on ESP—their methods were so influential they basically invented modern statistical psychology, even though they never proved psychic powers exist.
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