Parapsychology: study of reported psychic phenomena, research, and debate

Typical phenomena studied

• Extrasensory perception (ESP) — alleged reception of information without use of the five senses, including telepathy between people.
• Psychokinesis (PK) — claimed influence of the mind on matter, often studied under the name psychokinesis or micro-PK.
• Anomalous experiences — events such as past life experiences, near-death experiences, apparitions and other subjective episodes that participants regard as extraordinary.

Research methods and examples

Researchers in parapsychology have used laboratory experiments, statistical studies and case investigations. Controlled tests include forced-choice guessing tasks, card-guessing and electronic random-event generators, and sensory-reduction experiments such as the Ganzfeld procedure. Fieldwork examines reports of hauntings, mediumship and spontaneous psychic claims. Advocates often emphasize statistical anomalies found in meta-analyses; critics point to replication failures and methodological concerns.

History and development

The systematic study of such claims dates from the late 19th and early 20th centuries with organizations established to investigate spiritualist and anomalous reports. Early contributors from psychology and philosophy took an interest in mediumship and alleged psychic phenomena. During the 20th century, laboratory programmes and university-affiliated laboratories advanced experimental approaches, while others focused on case documentation and theory.

Reception, criticism and notable views

Parapsychology remains controversial. Mainstream science generally regards the field skeptically because reliable, repeatable evidence and a convincing mechanism consistent with established science have not been widely accepted. Critics cite methodological flaws, publication bias and the difficulty of reproducing headline claims. Still, some scientists and commentators — including well-known figures who have publicly urged open-minded study — argue for continued investigation of reported anomalies.

Cultural importance and distinctions

Regardless of scientific opinion, parapsychological topics have had substantial cultural impact: they appear in literature, film, religious discussion and popular beliefs. It is important to distinguish scientific parapsychology— which attempts controlled study — from occult, religious or entertainment practices that make metaphysical or faith-based claims. Readers encountering reports should weigh evidence, consider alternative explanations such as cognitive biases or fraud, and note the persistent gap between anecdote and reproducible experimental proof.

Further reading and resources often include both skeptical critiques and sympathetic summaries; for balanced inquiry consult academic reviews and well-documented case compilations.

See also: paranormal overview, sensory limits, telepathy studies, mind–matter debate, definitions of matter, psychokinesis experiments, past-life accounts, near-death research.