‘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
Battersea Poltergeist (1928)
Abnormal disturbances reported in a small house in Battersea, London, investigated by Harry Price.
AWARE NDE Studies
AWARE and AWARE II were large-scale studies testing for veridical perceptions recalled by hospital patients during NDEs.
Robert Bigelow and the Bigelow Institute for Consciousness Studies
Billionaire American businessman whose foundation funds research on post-mortem survival.
Christopher Robinson
British psychic said to possess precognitive dream ability of use to UK police and security services.
The Telepathy Tapes
Podcast series exploring claims that certain nonspeaking autistic individuals possess telepathic abilities.
Psychische Studien (journal)
Early German psychical research journal (1874–1925) that contained reports of experiences and investigations.
Allan Kardec
French educator (1804–1869) whose work with mediums led to the development of Spiritism, today highly popular in Brazil.
Neuroimaging and Psi
Recent advances in brain imaging technology have been exploited in several lines of psi research.
Center for Research on Consciousness and Anomalous Psychology (CERCAP)
Under Etzel Cardeña at Lund University.
Reincarnation and the Population Problem
The idea that increases in population are a problem has been addressed in various ways.
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.
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.
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.
Neuroimaging and Psi
Recent advances in brain imaging technology have been exploited in several lines of psi research.
Dreams and ESP
This article describes the experience and study of ESP in dreams, notably of telepathic interactions and precognitions of future events.
UK (Non-University) Paranormal Research
Overview of non-university organizations that carry out psi research.
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.
Olga Kahl
Russian psychic known for her ability to cause words and images received telepathically appear briefly as red marks on her skin.
Bangs Sisters
Controversial nineteenth century American spirit mediums, against whom numerous detailed allegations of fraud were
Helen Duncan
Controversial Scottish physical medium (1898–1956) sentenced to jail under England’s Witchcraft Act of 1735.
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.
The Boy Who Came Back From Heaven (recanted NDE)
Best-selling American book describing the supposed NDE of a 6-year-old child.
Terminal Lucidity
Persons with long-term dementia and other severe neurological disorders may return to mental clarity shortly before dying.
Near-Death Experience (Overview)
This article describes anomalous mental events reported by people who have survived a near-fatal accident or illness.
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.
Maroczy Mediumistic Chess Match
Match played between a living Russian grandmaster and a deceased Hungarian one.
Windbridge Institute
Institution founded in 2008 to conduct research on psi functioning, with an emphasis on real-world applications.
Mediumship and Spirit Possession in Cross-Cultural Perspective
There is great overlap in the expression of mediumship and spirit possession.
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.
Dutch Children with Past-Life Memories
List of 31 cases of Dutch children who spoke of previous lives, investigated by Titus Rivas and his team.
Dreams and Past-Life Memory
Apparent past-life memories may surface in the dreams of both children and adults, but rarely are they detailed enough to be verified.
Cameron Macauley (reincarnation case)
Glaswegian who as a young child claimed to remember living on a remote Scottish island.
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.
Eleonore Zugun (Talpa Poltergeist)
Adolescent Romanian girl (1913–1991), the centre of a well-documented 1920s poltergeist-type episode.
Battersea Poltergeist (1928)
Abnormal disturbances reported in a small house in Battersea, London, investigated by Harry Price.
Miami Poltergeist
1960s episode in which Florida-themed souvenir items were seen repeatedly falling from warehouse shelves.
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.
Richet’s Traité de Métapsychique (Thirty Years of Psychical Research)
A classic review of the literature, published in 1922.
Scientific Mysticism
Describes the theory of mathematician and mystic Michael Whiteman, based in part on his own experiences.
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.
Ralph Noyes
Senior official in the British Ministry of Defence (1923–1998) involved in investigations of mediumship, crop circles and UFOs.
Allan Kardec
French educator (1804–1869) whose work with mediums led to the development of Spiritism, today highly popular in Brazil.
Maurice Grosse
British engineer and inventor (1919–2006) who in later life became engaged in psychical research.
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.
Bial Foundation
Foundation set up by Portuguese pharmaceutical giant to support research in neuroscience, psychophysiology and parapsychology.
Emotion and Motivation Laboratory
Laboratory which conducts psi research, based at the University of Munich, Germany.
Koestler Parapsychology Unit (KPU)
A leading centre for parapsychological research and training, based at the University of Edinburgh.
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.
James Randi
Canadian-born conjurer (1928–2020) and public scourge of psychics, faith healers, parapsychologists and practitioners of alternative medicine.
Trevor Hall
English chartered surveyor and amateur conjuror (1910–1991), author of books attacking deceased psychics and researchers.