The term reduplicative hallucination is indebted to the Latin noun reduplicare, which means to double. It is used as an umbrella term for hallucinations depicting a mirror image or reduplication of oneself, as is the case in "autoscopy, "heautoscopy, "out-of-body experience (OBE), "doppelgänger phenomena, and " specular hallucinations.
References
Brugger, P., Regard, M., Landis, Th. (1997). Illusory reduplication of one's own body: Phenomenology and classification of auto-scopic phenomena. Cognitive Neuropsychiatry, 2, 19-38.
Dictionary of Hallucinations. J.D. Blom. 2010.