‘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
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.
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.
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.
Meta-Analysis in Parapsychology
Meta-analysis is a statistical procedure that combines studies in a particular area of research to provide more robust findings
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.
Experimental Parapsychology
Overview of efforts to apply experimental methods to the study of psi experiences, from the 1870s to today.
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.
Matthew Manning
British man, the focus of poltergeist activity in his teens, later known for his metal-bending, psychic activities, and healing.
Francis Bacon and the Occult
Francis Bacon (1561–1626) believed in the possibility of psi but opposed its investigation on theological grounds.
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.
Dreams and ESP
This article describes the experience and study of ESP in dreams, notably of telepathic interactions and precognitions of future events.
Healing at a Distance (DMILS Research)
Since the 1980s, parapsychologists have studied distant mental interactions with living systems.
Dream ESP Reports (list)
Summaries of reports, surveys and analyses of dream ESP in the SPR archives from 1889 to 1998.
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.
Did Robert Swain Gifford Survive Death?
Analysis of the Thompson-Gifford case of ostensible possession as evidence of survival.
The Junot Sittings (Leonora Piper)
Highly evidential communications purporting to come from the surviving spirit of a deceased teenager.
Encounters With the Deceased
Describes types and characteristics of encounters with deceased loved ones in dreams and elsewhere.
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.
Purnima Ekanayake (reincarnation case)
This article describes a Sri Lankan girl who remembered a life as a male incense maker and exhibited cross-sex behaviours.
Reincarnation and the Population Problem
The idea that increases in population are a problem has been addressed in various ways.
Sunil Dutt Saxena (reincarnation case)
North Indian case of a boy who began to talk about being a wealthy businessman when he was less than two years old.
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.
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.
Vienna Workshop Poltergeist
A Viennese member of the Society for Psychical Research describes poltergeist distrurbances he witnessed.
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.
Witchcraft
Traces the development of witchcraft as the socially proscribed practice of magic, from Antiquity to the present day.
Jott: Phenomena of Spatial Discontinuities
The everyday misplacements of objects may sometimes have a non-normal cause.
Psychische Studien (journal)
Early German psychical research journal (1874–1925) that contained reports of experiences and investigations.
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.
Robert Monroe
American busnessman (1915–1995), founder of The Monroe Institute, which offers training in his Hemi-Sync technology to explore consciousness.
Robert Hare
American chemistry professor and inventor (1781–1858), whose experiments with mediums convinced him of postmortem survival.
Giovanni Battista Ermacora
Italian scientist (1858–1898) who devoted much time to researching telepathy and other psychical phenomena.
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.
Windbridge Research Center
Non-profit research institute based in Tucson, Arizona, dedicated to the rigorous study of mental mediums.
Institute of Noetic Sciences (IONS)
American research institute co-founded in 1973 by astronaut Edgar Mitchell to research human potential using scientific methods.
Exceptional Experience and Consciousness Studies (EECS)
Based at the University of Northampton, this is the largest centre for parapsychological research in the world.
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.
James Randi
Canadian-born conjurer (1928–2020) and public scourge of psychics, faith healers, parapsychologists and practitioners of alternative medicine.
Richard Wiseman
British psychology professor, media personality and bestselling author who is a high-profile critic of parapsychology.
Harry Houdini
The legendary stage magician (1874–1926) was hostile to Spiritualism and wrote books about his debunking of mediums.