"Poltergeist" is a German word meaning "noisy spirit." Current research indicates, however, that poltergeist activity may have nothing to do with ghosts or spirits. Since the activity seems to center around an individual, it is believed that it is caused by the subconscious mind of that individual. It is, in effect, psychokinetic activity. The individual is often under emotional, psychological or physical stress (even going through puberty). Effects can include rappings on walls and floors, the physical movement of objects, effects on lights and other electric appliances - even the manifestation of physical phenomena.
POLTERGEIST Heather O'Rourke Story