In experimental parapsychology, a condition, procedure or comparison used to assess alternative influences on an experiment’s result. For more, see: Psi EE: Experimental Parapsychology ยท PF glossary. In mental mediumship, an entity, either an independent discarnate spirit or a manifestation of the medium’s subconscious, which interacts with discarnate communicators and passes on information from them. For more, see: PE: Mediumship and Multiple Personality.