Apparition
A disembodied spirit that can be seen by people. Sometimes it may be transparent, and may also appear solid.
Cold Spot
A cooler section of a room that may indicate paranormal activity. Spirits try to manifest by drawing energy from its surrounding area.
Electro-Magnetic Field
Certain items give off an electrical field or current. Though these are not noticable to us, meters can be used to detect these fields. Spirits tend to draw energy from these items.
Electronic Voice Phenomena(EVP)
In 1959, painter and film producer Friedrich Jurgenson was recording bird calls on a tape recorder, when he played it back, he heard what sounded like the voices of his father and wife who were both deceased. New digital voice recorders allow investigators to better hear these sounds.
Debunk
The task of ruling out all possibilties a haunting can be disproven. Some ways are looking for things that might make certain noises, that can seem unnatural. These may include loose pipes, aging houses settling, animals, or even outside occurances.
Ghost
The spirit of someone who has passed away. They may appear to be transparent or look as they did before their death.
Intelligent Haunting
When a spirit is able to interact with a living person, and is aware of it's surroundings.
Orb
Probably the most controversial evidence to an investigator. Can appear to be floating balls of light, sometimes seen with the human eye and also picked up on film. One factor is dust particles, depending on a rooms condition. Water droplettes and mist also can make one think there is spiritual activity taking place.
Paranormal Activity
The unexplained phenomena which may occur in a person's everyday life. For example: If a picture frame is placed in a particular place everyday, and suddenly it has moved from that space.
Risidual Haunting
A paranormal occurance that keeps happening over and over again. It may be daily or once a year, with the spirit not knowing it is out of it's time period.
Sleep Paralysis
A state of sleep when it seems you are awake, but you are unable to move or speak.