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ESP: What a Folklorist Notices First
Extrasensory perception is the claimed acquisition of information without the recognized senses, sorted in the parapsychological literature into telepathy, clairvoyance, precognition, and psychokinesis. After ninety years of laboratory work, no robust replicated evidence supports the phenomenon. Yet ESP belief remains widespread, patterned, and culturally substantive, which is itself the more interesting finding.
A folklorist arriving at ESP arrives twice. Once, through the published literature, where the Zener cards, the ganzfeld booths, and the Stargate field reports sit alongside the Bayesian critiques and the failed replications. And again through the kitchen-table interview, where a person describes the moment they knew, hours before the call came, that someone they loved had died. Those two arrivals do not contradict each other. They occupy different epistemic rooms. The job here is to walk both rooms honestly within the broader landscape of paranormal and supernatural phenomena, naming what the laboratory record actually shows and naming what the witness account actually is.
The Vocabulary the Field Settled On
The four-part taxonomy in widest use traces to J.B. Rhine’s Duke laboratory in the 1930s. Telepathy is the apparent transfer of information mind-to-mind. Clairvoyance is the apparent acquisition of information about a distant object or event without sensory channels. Precognition is the apparent acquisition of information about a future event before it has occurred. Psychokinesis, the lone non-perceptual category, is the apparent influence of mind on matter without recognized physical mediation. Rhine named the perceptual forms “extra-sensory perception” and treated all four as expressions of one underlying process. The umbrella term “psi” was not his: the British psychologist Robert Thouless introduced it in 1942, crediting the physiologist Bertold Wiesner, and in 1947 the two extended it to cover psychokinesis [1].
These definitions are useful even if one rejects the underlying claims. They give witnesses a vocabulary to describe what they think happened, and they give researchers a hypothesis precise enough to be tested. Folklorists use the same vocabulary descriptively, the way an ethnographer uses an informant’s term for a spirit category without endorsing the spirit’s metaphysics.
What “Psi” Lets the Conversation Do
Thouless wanted a word that assumed nothing. He argued that “telepathy,” “clairvoyance,” “precognition,” and even Rhine’s “extra-sensory perception” were misleading because they built in assumptions about how the effects worked. A bare Greek letter named the unknown factor without explaining it. Thouless and Wiesner’s further split of psi into psi-gamma (ESP) and psi-kappa (psychokinesis) is still sometimes used by parapsychologists.
The Society for Psychical Research and the Founding Generation
The first sustained scientific effort to study ESP was Cambridge-shaped. The Society for Psychical Research was constituted in London on February 20, 1882, growing out of conversations between the physicist William Barrett and the spiritualist Edmund Dawson Rogers. Its first president was Henry Sidgwick (1838-1900), a Fellow of Trinity College, Cambridge, who became the university’s Knightbridge Professor of Moral Philosophy in 1883. His closest collaborators were the classicist Frederic W.H. Myers (1843-1901), who coined the word telepathy, and Edmund Gurney (1847-1888), who wrote most of the two-volume Phantasms of the Living (1886) with Myers and Frank Podmore, an analysis of more than seven hundred personal experiences, many of them “crisis apparitions” [2].
The early SPR was unusual for its time. Sidgwick set a standard of skeptical rigor uncommon in nineteenth-century psychical research. The society exposed several prominent mediums as fraudulent, including Eusapia Palladino in some sittings, and developed early protocols for telepathy testing. Its records are now archived at Cambridge University Library, a working historical resource for anyone reconstructing what late-Victorian witnesses said they experienced.
J.B. Rhine and the Zener-Card Decade
Joseph Banks Rhine (1895-1980) and his wife Louisa Rhine arrived at Duke University in 1927 at the invitation of psychologist William McDougall. In 1930, J.B. Rhine began card-guessing tests, at first with cards stamped with numerals. With the perceptual psychologist Karl Zener, he then adapted a card-guessing procedure pioneered by Ina Jephson of the Society for Psychical Research, switching to a twenty-five-card pack with five each of five symbols: a circle, a square, a cross, wavy lines, and a star. The cards were originally called Zener cards and are now usually called ESP cards [3].
Rhine’s 1934 monograph Extra-Sensory Perception reported odds against chance long enough to make headlines. His 1935 separate Parapsychology Laboratory at Duke ran for three decades. Rhine retired from Duke in 1965, and the laboratory’s work transferred off-campus to the Foundation for Research on the Nature of Man, which was renamed the Rhine Research Center in 1995. Criticism came quickly. From 1935, psychologists including R.R. Willoughby of Clark University and C.E. Kellogg of McGill University attacked the statistics, and even sympathetic psychical researchers wanted more detail about the experimental controls. Rhine’s later, tighter protocols answered some of those criticisms; the field’s outside reception remained skeptical.
What the Card Studies Actually Demonstrated
Read in the most generous way, the Duke card studies showed small effect sizes statistically distinguishable from chance over enormous trial counts. Read in a more conservative way, the studies showed how difficult it is to maintain methodological purity over thousands of guesses. Both readings are honest; both are widely defended. The card decade is the place the field’s central tension first became visible: the effect, if real, was small, and small effects are exquisitely sensitive to procedure.
The Ganzfeld Era and the Honorton-Hyman Debate
By the 1970s, ESP testing had moved away from card-guessing toward the ganzfeld procedure, a mild perceptual-isolation method in which a receiver sits in a soft red light with halved ping-pong balls over the eyes and white noise in headphones, while a distant sender attempts to transmit a randomly selected target image. Charles Honorton (1946-1992), working first at the Maimonides Medical Center dream lab in Brooklyn and then at his Psychophysical Research Laboratory in Princeton, ran the most influential of these studies between 1974 and 1989 [4].
In 1982, Honorton and the psychologist Ray Hyman presented rival analyses of the ganzfeld record, which then ran to 42 reports, and began a sustained published exchange. Hyman pointed to possible optional stopping, sensory cues from handled target pictures, and unpublished failures. Their 1986 joint communiqué agreed that “there is an overall significant effect,” disagreed over whether it was evidence for psi, and set stricter standards for future work, including randomized judging and tighter security. Honorton’s Psychophysical Research Laboratories met those standards with a computer-controlled “autoganzfeld.” Reporting its eleven series in 1994, Daryl Bem and Honorton found receivers picking the target roughly one time in three, against one in four expected by chance. A 1999 meta-analysis of 30 later studies by Julie Milton and Richard Wiseman found no significant effect, and later meta-analyses have alternately supported and undermined the finding, with no stable consensus.
The Bem Affair: Precognition, JPSP, and the Replication Crisis
The most consequential ESP paper of the past two decades was not published in a parapsychology journal. In 2011, Cornell social psychologist Daryl Bem published “Feeling the Future” in the Journal of Personality and Social Psychology, the flagship of the field. Across nine experiments and over a thousand participants, Bem reported small but statistically significant precognition effects in time-reversed versions of well-established paradigms, including a backwards-priming task and a retroactive recall facilitation [5].
The paper became a methodological earthquake. The next year, Jeff Galak, Robyn LeBoeuf, Leif Nelson, and Joseph Simmons published seven attempted replications of Bem’s recall facilitation, totaling more than 3,000 participants, in JPSP. Their combined effect was indistinguishable from zero. The episode is often named as a starting point of psychology’s replication crisis, which has since pushed researchers toward registering their plans before collecting data. Bem himself later joined a large multisite, pre-registered replication of one of his experiments; by its pre-registered analysis, it found no evidence for ESP.
What the Failed Replication Means
A failed replication does not prove the original was wrong. It removes a particular kind of support and shifts the burden. After Galak and colleagues, an honest reader of the parapsychological literature has to weight the field’s claims against an enlarged background expectation that even high-prestige journal results may not survive replication, and that ESP-shaped findings sit inside that broader uncertainty.
Stargate: Two Decades of Classified Remote Viewing
Between 1972 and 1995, the U.S. government funded a sequence of remote-viewing programs. The research began at Stanford Research Institute (later SRI International) under the physicists Russell Targ and Harold Puthoff and moved to Science Applications International Corporation (SAIC) in 1991, while an Army unit of remote viewers worked out of Fort Meade, Maryland. Run at different times by or for the CIA, Army intelligence, and the DIA, the effort went by code names including SCANATE, Gondola Wish, Grill Flame, Center Lane, and Sun Streak. The umbrella program is now called by its final designation, Stargate. Roughly $20 million was spent over the program’s life [6].
In 1995, with the program in transfer to CIA, the agency commissioned the American Institutes for Research to evaluate it. The two named outside reviewers were the statistician Jessica Utts (in favor) and the psychologist Ray Hyman (against). The final report, dated 29 September 1995, concluded that “it remains unclear whether the existence of a paranormal phenomenon, remote viewing, has been demonstrated,” and that the information produced was “vague and ambiguous” enough to be operationally unhelpful for actionable intelligence. The CIA terminated and declassified Stargate that year. Many of the program’s working files were posted to the agency’s electronic reading room, where they remain available.
The Meta-Analytical Argument
One major attempt to settle the psychokinesis side of the question is the 2006 Psychological Bulletin meta-analysis by Holger Bösch, Fiona Steinkamp, and Emil Boller, which combined 380 random-number-generator studies. They reported a small but statistically significant overall effect, while also showing that effect size was strongly inversely related to sample size, and that the heterogeneity across studies was extreme. A Monte Carlo simulation showed that the small effect, the link between sample size and effect size, and the extreme heterogeneity could in principle all be produced by publication bias [7].
Proponents have responded with their own meta-analyses, including a meta-analysis by Bem, Tressoldi, Rabeyron, and Duggan, first published in 2015 and revised in 2016, that pooled 90 precognition experiments from 33 laboratories in 14 countries and reported a very small but highly significant overall effect. The pattern across thirty years is now familiar: a small effect persists in aggregate, the effect shrinks as methodological controls tighten, and skeptical and proponent meta-analysts disagree about whether the residue is signal or sophisticated noise. No replication-quality result has settled the matter.
Susan Blackmore and the Long Inside Critique
The most instructive single career here belongs to Susan Blackmore. She earned a PhD in parapsychology from the University of Surrey in 1980, with a thesis titled Extrasensory Perception as a Cognitive Process. She entered the field a believer, convinced by an out-of-body experience as a student at Oxford. Over the following years she ran a long sequence of psi experiments, including tests of whether her baby daughter could influence a random number generator, and later summed up the result: “I found no psychic phenomena.” In 1987 she published a report on her 1979 visit to Carl Sargent’s ganzfeld laboratory at Cambridge, describing errors in how its protocol was followed. CSICOP, now the Committee for Skeptical Inquiry, gave her its Distinguished Skeptic Award in 1991 [8].
Blackmore’s transition was not a conversion narrative. It was the slow attrition of failing to replicate effects she had genuinely hoped to find, in a research program she designed in good faith. Her later writing on ESP is less about debunking than about charting the conditions under which a sincere researcher loses confidence. The folklorist’s interest in Blackmore is the same as the parapsychologist’s: she is a careful witness to her own experience, and the experience she describes is one of belief gradually withdrawn under the weight of negative data.
The Folkloric Fact of ESP Belief
If the laboratory verdict is that ESP has not been robustly demonstrated, the cultural verdict is that ESP is everywhere. In a 2005 Gallup poll, 41 percent of American adults said they believed in ESP, down from 50 percent in 2001, and about three in four held at least one of ten paranormal beliefs [9]. The accounts collected by folklorists, sociologists of religion, and qualitative parapsychologists like Louisa Rhine fall into recurring patterns: the crisis apparition that arrives at the moment of a death, the dream that anticipates an accident, the sudden knowing that a loved one is in trouble. These accounts do not depend for their cultural reality on whether the underlying claim is metaphysically true.
Folklorists use the term ostension, made central to folkloristics by Linda Dégh and Andrew Vázsonyi in 1983, for the traffic between legend and life, in which real events are interpreted or even acted out along the lines of stories people already know; as they put it, “fact can become narrative and narrative can become fact.” An ESP narrative is a tellable story; it has a recognizable arc, a moral center, a community of careful listeners. Stith Thompson’s Motif-Index of Folk-Literature gives the crisis apparition its own entry, E723.6: “Appearance of his wraith as announcement of person’s death.” To say that the laboratory has not confirmed ESP is not to say that the cultural object is small or that the witnesses are fooling themselves. The witnesses are doing what witnesses have always done. They are reporting an experience that mattered, in the cadence in which it mattered to them.
How to Honor the Witness Without Endorsing the Metaphysics
A working method runs in three movements. Listen carefully to the account in the witness’s own words, including the small details a more skeptical writer might trim. Render those words on the page without sentimentality. Then, separately and without claiming the two registers cancel each other, give the laboratory record its honest summary. The reader who arrives at the end has both rooms in mind, and the choice of what to make of them is not the writer’s to make for them.
What the Record Is and Is Not
After ninety years of laboratory work, the parapsychological record is a long sequence of small effects that fail to consolidate under tighter controls. The Stargate program ended after its 1995 evaluators concluded that remote viewing had never produced actionable intelligence. The Bem replications failed. The Bösch meta-analysis is consistent with publication bias. The most rigorous inside critic of the field, Susan Blackmore, became a skeptic on the strength of her own null data. None of these findings prove ESP impossible. They establish that the evidence demanded by the broader scientific community has not arrived.
And in the parallel record, the one folklorists keep, ESP belief is a steady cultural fact. People report knowing things they cannot know. They report this in the same cadences across centuries, with the same emotional weight, in language that carries the warmth of being meant. The folklorist’s job is not to decide whether any single account is true. The job is to render the witness’s words faithfully, alongside the laboratory’s confidence interval, and to leave the reader honestly uncertain about what the world contains.
Frequently Asked Questions
Has ESP been scientifically proven?
No. The mainstream scientific position is that ESP has not been demonstrated by replicable evidence. Small statistical effects appear across some meta-analyses, but they shrink under tighter methodological controls, and large replication attempts, including Galak and colleagues’ 2012 replication of Daryl Bem’s precognition studies with more than 3,000 participants and a later multisite, pre-registered replication run with Bem himself, have returned null results.
What are Zener cards and how were they used?
Zener cards are a deck of twenty-five cards bearing five symbols: circle, square, cross, wavy lines, and a five-pointed star. They were designed by Karl Zener and J.B. Rhine at Duke in the early 1930s as a tool for testing telepathy and clairvoyance. A receiver guesses the order of a shuffled deck; chance expectation is five hits per twenty-five-card run.
What was the CIA’s Stargate Project?
Stargate was the umbrella name for the U.S. government’s classified remote-viewing program, run between 1972 and 1995 across SRI, the DIA, CIA, and Army intelligence. The 1995 American Institutes for Research evaluation concluded that remote viewing had not been demonstrated to a useful operational standard, and the program was terminated and declassified that year.
Did Daryl Bem prove precognition exists?
No. Bem’s 2011 paper in the Journal of Personality and Social Psychology reported significant effects, but seven replication experiments with 3,289 participants, published by Jeff Galak, Robyn LeBoeuf, Leif Nelson, and Joseph Simmons in 2012, failed to find the effect. The Bem affair is now widely cited as a catalyst for the broader replication crisis in psychology.
What is the ganzfeld procedure?
The ganzfeld is a mild perceptual-isolation procedure: the receiver sits under soft red light with halved ping-pong balls over the eyes and white noise in headphones while a separated sender views a randomly chosen target image. It was developed in parapsychology in the 1970s, refined into the autoganzfeld protocol by Charles Honorton in the 1980s, and is often regarded as the flagship of experimental parapsychology.
Who founded the Society for Psychical Research?
The Society for Psychical Research was constituted in London on February 20, 1882. Its first president was the Cambridge philosopher Henry Sidgwick, working closely with the classicist Frederic W.H. Myers and the psychologist Edmund Gurney. The SPR was the first organization to apply systematic scientific method to claims of telepathy, hauntings, and mediumship.
Why did Susan Blackmore stop believing in ESP?
Blackmore earned a PhD in parapsychology from the University of Surrey in 1980 and spent years running ESP and psychokinesis experiments. Her own studies found no psychic phenomena, and her 1987 report on a visit to Carl Sargent’s ganzfeld laboratory at Cambridge described errors in how its protocol was followed. CSICOP, now the Committee for Skeptical Inquiry, gave her its Distinguished Skeptic Award in 1991. Her transition was driven by accumulated negative data rather than by ideological argument.
How widespread is belief in ESP?
In a 2005 Gallup poll, 41 percent of U.S. adults said they believed in ESP, 31 percent in telepathy, and 26 percent in clairvoyance, and about three in four held at least one of ten paranormal beliefs. Gallup found no statistically significant differences in paranormal belief by age, gender, education, race, or region.
What is ostension and why does it matter to ESP accounts?
Ostension is a folklore term, made central to the field by Linda Dégh and Andrew Vázsonyi in 1983, for the ways legends spill into life: real events are interpreted, or even acted out, in terms of a known story. Applied to ESP accounts, ostension highlights how a culturally recognized story arc, the crisis apparition, the precognitive dream, gives a witness a shape into which to fit a strange experience, without requiring the underlying metaphysics to be true.
What is the difference between telepathy, clairvoyance, and precognition?
Telepathy is the apparent transfer of information between minds. Clairvoyance is the apparent acquisition of information about a distant object or event without sensory mediation. Precognition is the apparent acquisition of information about a future event before it occurs. J.B. Rhine grouped the three as “extra-sensory perception” in the 1930s; the umbrella term “psi,” introduced by Robert Thouless in 1942, also covers psychokinesis, the non-perceptual fourth category.
Sources
- Michael Willin, Robert H Thouless, Psi Encyclopedia (Society for Psychical Research), 2021, updated 26 May 2026. psi-encyclopedia.spr.ac.uk; Sally Rhine Feather and Barbara Ensrud, Joseph Banks Rhine, Psi Encyclopedia, 2018, updated 30 April 2026. psi-encyclopedia.spr.ac.uk
- Society for Psychical Research, Our History. spr.ac.uk; Donald J. West, Society for Psychical Research (SPR), Psi Encyclopedia, 2015, updated 27 April 2026. psi-encyclopedia.spr.ac.uk; Henry Sidgwick, Wikipedia. en.wikipedia.org
- Sally Rhine Feather and Barbara Ensrud, Joseph Banks Rhine, Psi Encyclopedia, 2018, updated 30 April 2026. psi-encyclopedia.spr.ac.uk
- Melvyn Duggan, Charles Honorton, Psi Encyclopedia, 2020, updated 11 September 2026. psi-encyclopedia.spr.ac.uk; Adrian Parker, Ganzfeld ESP, Psi Encyclopedia, 2017, updated 8 September 2026. psi-encyclopedia.spr.ac.uk; Julie Milton and Richard Wiseman, Does Psi Exist? Lack of Replication of an Anomalous Process of Information Transfer, Psychological Bulletin 125(4), 1999, 387-391. richardwiseman.com
- Daryl J. Bem, Feeling the Future: Experimental Evidence for Anomalous Retroactive Influences on Cognition and Affect, Journal of Personality and Social Psychology 100(3), 2011. doi.org; Jeff Galak, Robyn A. LeBoeuf, Leif D. Nelson and Joseph P. Simmons, Correcting the Past: Failures to Replicate Psi, Journal of Personality and Social Psychology 103(6), 2012, 933-948. pubmed.ncbi.nlm.nih.gov; Daniel Engber, Daryl Bem Proved ESP Is Real. Which Means Science Is Broken., Slate, 7 June 2017. slate.com
- Michael D. Mumford, Andrew M. Rose and David A. Goslin, An Evaluation of Remote Viewing: Research and Applications, American Institutes for Research, 29 September 1995 (archived copy). web.archive.org; Stargate Project (U.S. Army unit), Wikipedia. en.wikipedia.org
- Holger Bösch, Fiona Steinkamp and Emil Boller, Examining Psychokinesis: The Interaction of Human Intention with Random Number Generators. A Meta-Analysis, Psychological Bulletin 132(4), 2006, 497-523. pubmed.ncbi.nlm.nih.gov; Daryl Bem, Patrizio E. Tressoldi, Thomas Rabeyron and Michael Duggan, Feeling the Future: A Meta-Analysis of 90 Experiments on the Anomalous Anticipation of Random Future Events, F1000Research 4:1188, version 2, 2016. f1000research.com
- Susan Blackmore, Wikipedia. en.wikipedia.org; Susan Blackmore, A Report of a Visit to Carl Sargent’s Laboratory, Journal of the Society for Psychical Research 54, 1987, 186-198, as quoted in Adrian Parker, Ganzfeld ESP, Psi Encyclopedia. psi-encyclopedia.spr.ac.uk
- David W. Moore, Three in Four Americans Believe in Paranormal, Gallup News Service, 16 June 2005. news.gallup.com