Parapsychology is the study of mental and physical phenomena that can’t be explained by known natural laws or ordinary sensory abilities. It investigates whether people can acquire information beyond the five senses, such as reading another person’s thoughts, perceiving distant events, or glimpsing the future. It also examines whether the mind can physically influence objects without touching them. The field sits at the boundary between mainstream science and the unexplained, drawing both serious academic interest and intense skepticism.
What Parapsychology Actually Studies
The field focuses on two broad categories. The first is extrasensory perception, or ESP, which covers telepathy (mind-to-mind communication), clairvoyance (perceiving objects or events at a distance), and precognition (knowing about future events before they happen). The second is psychokinesis, the idea that a person’s intention can physically affect the world, from influencing the roll of dice to bending metal. Researchers in the field use the umbrella term “psi” to refer to any of these phenomena collectively.
These aren’t fringe curiosities dreamed up in someone’s basement. The Parapsychological Association became an affiliate of the American Association for the Advancement of Science in 1969, and dedicated research units exist at several universities. The University of Edinburgh’s Koestler Parapsychology Unit operates within its psychology department. The University of Virginia’s Division of Perceptual Studies investigates survival of consciousness after death, near-death experiences, and out-of-body experiences. Duke University’s Rhine Research Center, where much of the field’s early work took place, continues to explore consciousness today.
How It Became a Formal Field
Parapsychology took its modern shape in 1930, when psychologist William McDougall invited J.B. Rhine and his wife Louisa Rhine to Duke University. Rhine wanted to bring the rigor of laboratory science to claims that had previously been the territory of spiritualists and stage performers. His most famous tool was the Zener card test: a researcher would hold up a card behind an opaque barrier, and the participant would try to identify the symbol on it without seeing it. The cards had five simple designs (circle, cross, wavy lines, square, star), so pure chance would produce a correct guess 20% of the time. Rhine was looking for consistent results above that baseline.
This approach, testing for small but statistically meaningful deviations from chance, became the template for nearly all parapsychological research that followed.
Key Experimental Methods
The Ganzfeld experiment is one of the most widely used and debated protocols in the field. The setup is designed to reduce all normal sensory input so that, if psi exists, it might become easier to detect. Participants recline in a comfortable chair in a soundproof room. Translucent half-spheres, often halves of ping-pong balls, are placed over their eyes while a red light floods their visual field, creating a uniform glow with no shapes or patterns. White or pink noise plays through headphones, masking outside sounds.
In this state of sensory deprivation, which typically lasts 15 to 30 minutes, participants describe aloud any images, feelings, or impressions that come to mind. Meanwhile, a randomly selected “target,” usually a photograph or short video clip, has been chosen by an automated system. After the session ends, participants are shown four options (the target plus three decoys) and asked to pick the one that best matches what they experienced. With four choices, chance alone predicts a hit rate of 25%.
To prevent information leaking from experimenter to participant, the research assistant in the room doesn’t know which image is the target until after the participant has made their choice. Target selection and scoring are handled automatically.
For psychokinesis research, electronic random number generators replaced dice starting in the late twentieth century. These devices produce streams of random ones and zeros, and participants try to mentally shift the output in one direction. A meta-analysis combining 380 such studies found a statistically significant effect, though the size of that effect was very small.
The Stargate Program and Government Interest
The U.S. government spent more than $20 million over two decades on Project Stargate and related programs investigating “remote viewing,” the claimed ability to perceive distant locations using only the mind. About $11 million of that was spent between the mid-1980s and early 1990s. The program employed people who attempted to gather intelligence information through psychic means.
When the CIA commissioned an independent review, the results were split. Statistician Jessica Utts concluded that a statistically significant effect had been demonstrated in laboratory settings, with the psychics reportedly accurate about 15% of the time. Psychologist Ray Hyman, a prominent skeptic, disagreed with that interpretation. The final recommendation was to shut the program down. The CIA’s own conclusion was blunt: there was no case in which ESP had provided data actually used to guide intelligence operations.
What the Data Shows
The most controversial recent work came from psychologist Daryl Bem at Cornell University, who published a 2011 paper titled “Feeling the Future.” Across nine experiments, Bem reported that participants seemed to respond to events before they happened, with a combined effect size of 0.22 and odds against chance of roughly 100 billion to one.
The paper ignited a firestorm. A large-scale meta-analysis later examined 90 experiments on the same type of anomalous anticipation, including Bem’s originals and dozens of independent replications. The overall effect size shrank to 0.09 but remained statistically significant. When Bem’s own experiments were removed entirely and only independent replications were counted (69 experiments), the effect size dropped further to 0.06, still reaching statistical significance. A separate analysis technique estimated the “true” effect size for independent replications at 0.24, though this estimate is itself debated.
These numbers illustrate the core puzzle of parapsychology: the effects reported are tiny, but they keep appearing across large datasets in ways that resist easy dismissal by statistics alone.
Why Many Scientists Remain Skeptical
Skeptics raise several recurring objections. The first is bias, both conscious and unconscious. Even with blinding protocols, critics argue that subtle cues (sometimes called sensory leakage) can pass between experimenters and participants. The second is questionable research practices, a category that includes selectively reporting positive results while shelving negative ones. This “file drawer effect” can inflate the apparent strength of a phenomenon across published studies. The third is the basic problem of replication: individual experiments occasionally produce striking results, but no one has demonstrated a psi effect that can be reliably produced on demand in any laboratory.
Some skeptics go further, arguing that psi phenomena violate well-established physical laws and that no statistical pattern, however persistent, should override that fundamental implausibility. From this perspective, it’s more likely that some undetected methodological flaw explains the results than that the laws of physics need rewriting.
Supporters counter that the statistical effects are real and that the decline in effect size over time (a pattern seen across multiple lines of psi research) might itself be a feature of the phenomenon rather than evidence of methodological cleanup. This remains deeply contested.
Theoretical Frameworks
Parapsychologists have increasingly looked to quantum physics for possible explanatory models. The concept of quantum nonlocality, first introduced by physicist Niels Bohr in 1935, describes how two particles that have interacted can influence each other instantaneously regardless of the distance between them. Measuring one particle appears to affect the state of the other without any signal traveling between them.
Some researchers propose that consciousness might operate through a similar kind of nonlocal connection, a framework sometimes called “nonlocal realism.” Under this view, minds are not confined to brains in the way classical physics would suggest, but participate in a broader field of interconnected relationships that transcends ordinary limits of space and time. This remains a theoretical proposal rather than an established scientific model, and most physicists are skeptical that quantum effects at the subatomic level scale up to influence human cognition in this way.
Where Parapsychology Stands Today
The field occupies an unusual position in science. It uses standard experimental methods, publishes in peer-reviewed journals, and maintains professional organizations with ties to mainstream scientific bodies. Yet its central claims remain unproven by the standards most scientists require. No psi phenomenon has been demonstrated reliably enough for the broader scientific community to accept it as real.
Active research continues at a handful of institutions. The University of Edinburgh, the University of Virginia, the Rhine Research Center at Duke, and the University of California, Santa Barbara’s NeuroCausality Laboratory all conduct ongoing work. The University of Northampton in the UK teaches undergraduate and graduate-level courses in parapsychology and anomalous experience within its psychology program. Columbia University’s Spirituality Mind-Body Institute represents another thread, merging questions about consciousness with clinical psychology.
For most researchers in the field, the goal isn’t to prove the existence of psychic powers in any dramatic sense. It’s to determine whether the small, persistent statistical anomalies found in controlled experiments point to something genuine about consciousness that current science doesn’t yet account for, or whether they’re artifacts of methodology that will eventually be identified and corrected.