The term reduplicative phenomenon is indebted to the Latin noun reduplicare, which means to double. It is used as an umbrella term for a group of illusory perceptual phenomena characterized by the perseveration, reduplication, or reoccurrence of regular sense perceptions. Some examples of reduplicative phenomena are " visual perseveration (comprising the subgroups " illusory visual spread, " palinopsia, and the " trailing phenomenon), " palinacusis, " tactile polyaesthesia, "polyopia, and "entomopia.
References
Critchley, M. (1953). The parietal lobes. London: Edward Arnold & Co.
Dictionary of Hallucinations. J.D. Blom. 2010.