Ghosts and ghostly phenomena have been categorized in many different ways by various parapsychologists and authors. Today, the most commonly accepted categories are:
Entities: the disembodied spirits of deceased human beings or animals. The theory is that each of us (human or animal) has a subtle energy body and consciousness. When we die, this energy separates from the physical body and moves to another dimension. Ghost entities can interact with the living. They’re thought to be stuck in a physical location due to some deep connection or obsession with the place.
Imprints: also known as residuals, imprints are three-dimensional movies played back in particular locations. They’re occurrences from the past that replay themselves in present day, and are witnessed by people as sights and/or sounds. Imprints are characterized by not interacting with the observer. They often pass through walls or things that weren’t there when the objects of the phenomena existed in the physical world.
Poltergeists: German for “noisy ghosts.” While some ghosts exhibit poltergeist-like behaviour, only a small number of ghosts are poltergeists. These ghosts are known for making loud, disturbing noises and creating horrible smells. They throw things around and cause objects to levitate. They also make objects disappear and reappear in other places.
Shadow People: black, shadowy and seemingly intelligent entities. These ghosts are also known as dark entities or demonic spirits. They usually appear as dark mists, shadow outlines, or black orbs. They’re particularly aggressive and devious. Shadow people harass the living, make noises, scratch and push people around, and even trick children into harming themselves.