Agent n: this can have one of three
meanings when pertaining to parapsychology.
1). The agent is the person who tries to communicate or impart information
to another via telepathy or some similar means. Similarly the word
describes the person communicating information in an ESP experiment.
2). The agent is the subject of investigation in a psychokinesis
3). The agent is the person who is the focus or at the center of poltergeist