Summary: William G. Roll, Ph.D., is an Oxford-educated parapsychologist, who is famous for his investigations of poltergeist activity, and his explanation of Recurring Spontaneous Psychokinesis (RSPK), for which he coined the term. He has appeared on numerous segments of Unsolved Mysteries, as well as the Discovery Channel and other television documentaries. For more info, visit http://www.paranexus
