Are poltergeists real?
Poltergeists (from the German, “noisy ghosts”) usually manifest as strange electrical effects and unexplained movement of objects. At one time, these phenomena were thought to be due to ghosts, but after decades of investigations by researchers, notably by William G. Roll, the evidence now suggests that poltergeists are PK effects produced by one or more individuals, usually troubled adolescents. The term “RSPK,” meaning “Recurrent Spontaneous PK,” was coined to describe this concept.
