In ghostlore, a poltergeist (ˈpoʊltərˌgaɪst or ˈpɒltərˌgaɪst; German for "rumbling ghost" or "noisy spirit") is a type of ghost or spirit that is responsible for physical disturbances, such as loud noises and objects being moved or destroyed. Most claims or fictional descriptions of poltergeists show them as being capable of pinching, biting, hitting, and tripping people. They are also depicted as capable of the movement or levitation of objects such as furniture and cutlery, or noises such as knocking on doors. Foul smells are also associated with poltergeist occurrences, as well as spontaneous fires and different electrical issues such as flickering lights.
They have traditionally been described as troublesome spirits who haunt a particular person instead of a specific location. Some variation of poltergeist folklore is found in many different cultures. Early claims of spirits that supposedly harass and torment their victims date back to the 1st century, but references to poltergeists became more common in the early 17th century.
The word poltergeist comes from the German language words poltern ("to make sound" and "to rumble") and Geist ("ghost" and "spirit"), and the term itself translates as "noisy ghost", "rumble-ghost" or a "loud spirit". A synonym coined by René Sudre is thorybism, from Greek θορυβείν ("to make noise or uproar; throw into confusion").
Many claims have been made that poltergeist activity explains strange events (including those by modern self-styled ghost hunters), however their evidence has so far not stood up to scrutiny.
Many claimed poltergeist events have been proven upon investigation to be hoaxes.
Psychical researcher Frank Podmore proposed the 'naughty little girl' theory for poltergeist cases (many of which have seemed to centre on an adolescent, usually a girl). He found that the centre of the disturbance was often a child who was throwing objects around to fool or scare people for attention. Skeptical investigator Joe Nickell says that claimed poltergeist incidents typically originate from "an individual who is motivated to cause mischief".
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Paranormal events are purported phenomena described in popular culture, folk, and other non-scientific bodies of knowledge, whose existence within these contexts is described as being beyond the scope of normal scientific understanding. Notable paranormal beliefs include those that pertain to extrasensory perception (for example, telepathy), spiritualism and the pseudosciences of ghost hunting, cryptozoology, and ufology.
A haunted house, spook house or ghost house in ghostlore is a house or other building often perceived as being inhabited by disembodied spirits of the deceased who may have been former residents or were otherwise connected with the property. Parapsychologists often attribute haunting to the spirits of the dead who have suffered from violent or tragic events in the building's past such as murder, accidental death, or suicide.
A ghost is the soul or spirit of a dead person or non-human animal that is believed to be able to appear to the living. In ghostlore, descriptions of ghosts vary widely, from an invisible presence to translucent or barely visible wispy shapes to realistic, lifelike forms. The deliberate attempt to contact the spirit of a deceased person is known as necromancy, or in spiritism as a séance. Other terms associated with it are apparition, haunt, phantom, poltergeist, shade, specter, spirit, spook, wraith, demon, and ghoul.
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