Professor of philosophy at Rollins College, Orlando, Florida, who has carried out psi research, principally in the area of psychokinesis.

American lawyer, judge, and politician (1799–1874), remembered as one of the first serious investigators of séance mediums.

American psychoanalyst and paranormal investigator (1908-1998) known for his three-year study of  the ‘thoughtography’ practised by Ted Serios, and for his insightful theorising about the role of unconscious motivation in the manifestation of psi effects.

Italian scientist (1858-1898) who showed early brilliance in research into electricity but devoted most of his time to telepathy and other psychical phenomena before his untimely death aged 39.

German statistician and psychologist (1932-2017) who developed the highly successful ESP 'ball selection' test, and contributed to the study of astrological influences on athletes

Professor of applied mathematics at Comillas Pontifical University in Madrid, whose research has included remote viewing and aspects of paranormal belief.

British author (1929-2011) of books on hauntings, UFOs and Fortean phenomena, co-founder of ASSAP and of the Mary Evans Picture Library.

French psychologist with a particular interest in the clinical, historical and theoretical aspects of parapsychology.

Letitia Fairfield (1885-1978) was a pioneering medical doctor, lawyer and women’s rights campaigner, with an interest in parapsychology.

Retired Anglican priest, author of numerous popular fiction and non-fiction works relating to occult and paranormal phenomena.