‘Psi’, the Greek letter ψ, is the modern term for psychic phenomena. The existence of psi – and the related idea that consciousness is independent of the physical body (and so may survive bodily death) – are disputed, as they seem to violate well-established natural laws. However, researchers are convinced they have evidence for these things, posing a challenge to materialist science. The Psi Encyclopedia presents their reasoning in over 700 signed articles by 86 authors, many of them senior academics. It also provides links to books, articles and videos that are free to view.
Featured
Stephen E Braude
American philosopher and parapsychologist (1945–2026) remembered for his field investigations of apparent psychokinesis.
Meditation and Psi
Traditional Yogic teachings state that a person who attains a higher state of consciousness will manifest psychic powers.
Psychedelics and Psi
A gradual easing of restrictions means that psi research with psychedelics, once prevalent, could soon resume.
Psi Research in China
Recent experimental and theoretical work in China includes successful attempts to train ESP abilities in blind children.
Clinical Parapsychology
Therapeutic approach that aims to provide support for people disturbed by anomalous event experiences.
Psi for Financial Gain
Anecdotal accounts and lab tests suggest that psi can at times be used to advantage in gambling and financial speculation.
Coover Telepathy Experiments
Early telepathy experiments, once thought a failure, now considered statistically significant.
Key Topics
Psychology and Parapsychology
Explores the overlap between psychology and parapsychology, such as personality and other variables linked to psi.
Eminent People Interested in Psi (list)
A list of some 200 scientists, thinkers, writers, and artists who took seriously the possibility of psi.
Remote Viewing
An experimental form of clairvoyance, in which a suitably trained person attempts to visualise the topography of a distant scene.
Near-Death Experience (Overview)
This article describes anomalous mental events reported by people who have survived a near-fatal accident or illness.
Reincarnation: An Introduction
This introductory article covers beliefs in reincarnation, evidence for reincarnation, and sceptical views of the research.
Psychokinesis Research
Overview of experimental research on mind-matter interaction, commonly referred to as psychokinesis (PK).
American Society for Psychical Research (ASPR)
The oldest parapsychological organization in the United States, founded in 1884, now practically defunct.
Animals in Psi Research
Describes informal observations, early tests and modern lab experiments looking at animals' psychic capabilities.
Recent Additions
Witchcraft
Traces the development of witchcraft as the socially proscribed practice of magic, from Antiquity to the present day.
Planned Reincarnations
Planned reincarnation suggests that next-life circumstances can be chosen not just between lives but prior to death.
Alexander Nikolayevich Aksakov
First Russian psychical researcher, a government official who studied mediums and psychics.
FJM Stratton
British soldier and astrophysics professor (1881-1961) who investigated hauntings and other psychic phenomena.
Eileen J Garrett
Irish trance medium who worked with researchers to investigate her psychic abilities and founded the Parapsychology Foundation.
Àlex Gómez-Marín
Alex Gomez-Marin is a Spanish physicist and neuroscientist with research interests in parapsychology.
Garret Yount
American researcher who explores the links between molecular biology and aspects of consciousness, including energy healing.
Kim Penberthy
Kim Penberthy is a clinical psychologist at the University of Virginia with research interests in psi and spirituality.
Arnaud Delorme
American neuroscientist who has carried out experiments exploring the relation between consciousness and psi.
Brian Laythe
American psychologist and parapsychologist whose research interests include paranormal beliefs and experiences.
Marieta Pehlivanova
Marieta Pehlivanova is a researcher at the University of Virginia, with interests relating to near-death and related experiences.
Ulf Holmberg
Swedish economist who has investigated the potential impact of human consciousness on random physical systems.
Cold Reading
Discusses the psychological strategies that can be used to simulate a mediumistic communication or psychic reading.
Philip J Cozzolino
American researcher who has investigated psychological aspects related to parapsychological phenomena.
Jürgen Kornmeier
German parapsychologist with research interests in perception, altered states and consciousness.
James E Kennedy
American psi researcher specializing in experimental research, methodology and theoretical development.
Metal-Bending Research
Survey of research into claims that cutlery and other metal objects can potentially be bent by mind force alone.
Jack Houck
American engineer (1939–2013) noted for his mass demonstrations of psychokinesis at metal bending ‘parties’.
Center for Research on Consciousness and Anomalous Psychology (CERCAP)
Swedish research organization headed by Etzel Cardeña.
Marina Weiler
Marina Weiler is a Brazilian neuroscientist who studies anomalous experiences in terms of neuroscience.
Explore the Psi Encyclopedia
ESP & Psychokinesis
The term extra-sensory perception (ESP), introduced in the 1930s, comprises telepathy, clairvoyance and precognition, acknowledging that these categories may considerably overlap. Psychokinesis is the direct influence on matter by mind alone, without physical action. All have been successfully tested in the laboratory and studied in real life situations.
Psi Research in China
Recent experimental and theoretical work in China includes successful attempts to train ESP abilities in blind children.
Psi Research in North America
Key organizations and individuals involved in psi research in the US and Canada, from the 1930s to the present.
Unusual Ways of Testing for Psi
Psi abilities have been tested in more ways than the usual ones of card guessing, dice throwing, remote viewing and Ganzfeld.
Gifted People
Most people may only experience a psychic event once or twice in their lives, but for a few it’s a natural ability, which some develop as a professional career. Two types feature in the Psi Encyclopedia: those who have demonstrated telepathy, clairvoyance, precognition or psychokinesis in some way, and those who believe themselves to be in communication with the deceased.
Alex Tanous
Alex Tanous (1926–1990) was a noted New England psychic and parapsychologist, who contributed to out-of-body research.
Doris Stokes
Doris Stokes (1920–1987) was a controversial celebrity medium who was much in the public eye in Britain during the 1980s.
Ingo Swann
American artist (1933–2013) whose psychic ability led him to participate in successful ESP and PK experiments in the 1970s.
Mind & Body
This category contains articles that treat consciousness in relation to the body. Major topics covered include healing and psychotherapy; dreams and dreaming; and out-of-body experiences, end-of-life experiences, and near-death experiences, all of which suggest that consciousness may have an existence independent of the physical body.
Thoughtforms
Describes the concept of an entity created directly and exclusively by the mind, whether unconsciously or consciously.
Distressing Near-Death Experience
Although most reported near-death experiences (NDEs) are pleasant, almost one in five are disturbing.
Psychoanalysis and Psi
Psychoanalysts have often reported instances of psi occurring between patient and practitioner.
Survival of Death
Life continued in a spiritual or purely mental form after bodily death is a staple of religious beliefs worldwide, and likely is as old as humanity. The question of evidence for it has been central to the Society for Psychical Research since its founding in 1882. This category includes articles on mediumship as well as general topics related to the survival question. Other survival-related topics appear under other category headings.
Mediumship and Spirit Possession in Cross-Cultural Perspective
There is great overlap in the expression of mediumship and spirit possession.
De Rochas on Physical Mediumship
A 1896 book gives a detailed description of phenomena produced by Eusapia Palladino and others.
Did Robert Swain Gifford Survive Death?
Analysis of the Thompson-Gifford case of ostensible possession as evidence of survival.
Reincarnation
Reincarnation beliefs are widespread in the world and in recent decades researchers have found what they believe is evidence of them through the study of people (mainly children) who claim to have lived before. This category includes case studies and overviews of phenomena that appear regularly in the cases. Some articles deal with past life regression as well.
Dorothy Eady/Omm Sety (reincarnation case)
British woman who as a child was obsessed with ancient Egypt and became an Egyptologist.
Ismail Altinkilic and Cevriye Bayri (reincarnation cases)
Two Turkish children recalled lives as a married couple who were killed the same night.
Suzanne Ghanem (reincarnation case)
Lebanese Druze case of a Druze woman who died in the USA and was reborn in Lebanon, recalling many names.
Haunting
Location-based hauntings have been relatively little studied by parapsychologists, but the frequent incidence of apparitional episodes (the appearance of a deceased family member) attracted the attention of early researchers. Much interest has also centred on so-called ‘poltergeist’ episodes, of powerful domestic disturbances now often attributed to involuntary psychokinetic effects by living agents.
Seaford Poltergeist
Poltergeist-type disturbances in 1958 in Seaford, Long Island, New York, centering on a 12-year-old boy.
Ghost Hunting
'Ghost hunting’ is a popular term for the investigation of claims of site-based phenomena, such as apparitions and poltergeists.
Cideville Poltergeist
Mid-nineteenth century French poltergeist case, with testimonies given in court about the phenomena.
General Topics
This section lists articles on a variety of topics that are not found in any of the main categories, from brain research and altered states of consciousness to dowsing, crop circles and other anomalistic phenomena.
Eminent People Interested in Psi (list)
A list of some 200 scientists, thinkers, writers, and artists who took seriously the possibility of psi.
Cold Reading
Discusses the psychological strategies that can be used to simulate a mediumistic communication or psychic reading.
Kirlian Photography
Photographic technique pioneered in Russia that reveals light radiating from living organisms and other objects.
Scientists & Authors
Here can be found more than 300 biographical profiles of key figures who have been involved in psi research and parapsychology as field investigators, experimentalists, theorists and commentators. Many have scientific and academic backgrounds – in psychology, physics, biology, philosophy, engineering and other disciplines.
Cesare Lombroso
Influential Italian criminologist, doctor and psychiatrist (1835–1909) who engaged in psychical research and endorsed Eusapia Palladino.
Helen Salter
British psychologist and psychical researcher (1883–1959) who helped study the mediumistic Cross-Correspondences.
Oliver Lodge
British physicist (1851-1940) remembered for his pioneering early work in electricity and radio, who became an active investigator of mental mediumship.
Organizations
The oldest organizations devoted to parapsychology were member organizations like the Society for Psychical Research, established in London in 1882. Since JB Rhine founded the Parapsychology Laboratory at Duke University in 1930, there have been university-based units as well. This category comprises both historical and contemporary bodies concerned with research and education in parapsychology.
American Society for Psychical Research (ASPR)
The oldest parapsychological organization in the United States, founded in 1884, now practically defunct.
Heartmath Institute
California-based research institute investigating the relationship between heart and mind.
Southern California Society for Psychical Research
Organization founded in 1961 and merged with the International Foundation for Survival Research, now also defunct, in 1983.
Scepticism
Sceptics argue that psychics and mediums achieve their effects by trickery, that psychic experience is an illusory effect caused by a combination of brain misperceptions and confirmation bias, and that evidence of psi in laboratory tests can be attributed to poor methodology. This category includes biographies of leading sceptics as well as general articles discussing their allegations.
Martin Gardner
American critic of parapsychology and paranormal claims (1914–2010), a founding member of the modern sceptical movement.
Ray Hyman
American psychologist, amateur magician and leading sceptic, co-founder of the Committee for the Scientific Inquiry (CSI).
James Randi
Canadian-born conjurer (1928–2020) and public scourge of psychics, faith healers, parapsychologists and practitioners of alternative medicine.