HOME

TheInfoList



OR:

Sensory leakage is a term used to refer to information that transferred to a person by conventional means (other than
psi Psi, PSI or Ψ may refer to: Alphabetic letters * Psi (Greek) (Ψ, ψ), the 23rd letter of the Greek alphabet * Psi (Cyrillic) (Ѱ, ѱ), letter of the early Cyrillic alphabet, adopted from Greek Arts and entertainment * "Psi" as an abbreviation ...
) during an experiment into ESP.
Robert Todd Carroll Robert Todd Carroll (May 18, 1945 – August 25, 2016) was an American author, philosopher and academic, best known for The Skeptic's Dictionary. He described himself as a naturalist, an atheist, a materialist, a metaphysical libertarian, and a ...
. (2014)
"Sensory Leakage
in
The Skeptic's Dictionary ''The Skeptic's Dictionary'' is a collection of cross-referenced skeptical essays by Robert Todd Carroll, published on his website skepdic.com and in a printed book. The skepdic.com site was launched in 1994 and the book was published in 2003 w ...
.
For example, where the subject in an ESP experiment receives a visual cue—the reflection of a Zener card in the holder's glasses—sensory leakage can be said to have occurred.


History

Scientists such as
Donovan Rawcliffe ''The Psychology of the Occult'' is a 1952 skeptical book on the paranormal by psychologist D. H. Rawcliffe. It was later published as ''Illusions and Delusions of the Supernatural and the Occult'' (1959) and ''Occult and Supernatural Phenomena' ...
(1952),
C. E. M. Hansel Charles Edward Mark Hansel (12 October 1917 – 28 March 2011) was a British psychologist most notable for his criticism of parapsychological studies. Early life and education Hansel was born in 1917 in Bedford, England and attended Bedford ...
(1980),
Ray Hyman Ray Hyman (born June 23, 1928) is a Professor Emeritus of Psychology at the University of Oregon in Eugene, Oregon, and a noted critic of parapsychology. Hyman, along with James Randi, Martin Gardner and Paul Kurtz, is one of the founders of the ...
(1989) and Andrew Neher (2011) have studied the history of psi experiments from the late 19th century up until the 1980s. In every experiment investigated, flaws and weaknesses were discovered so the possibility of naturalistic explanations (such as
sensory cue Sensory may refer to: Biology * Sensory ecology, how organisms obtain information about their environment * Sensory neuron, nerve cell responsible for transmitting information about external stimuli * Sensory perception, the process of acquiri ...
s) or deception and trickery were not ruled out. The data from the Creery sisters and the Soal-Goldney experiments were proven to be fraudulent, one of the subjects from the Smith-Blackburn experiments confessed to fraud, the Brugmans' experiment, the experiments by John E. Coover,
Joseph Gaither Pratt Joseph Gaither Pratt (August 31, 1910 – November 3, 1979) was an American psychologist who specialized in the field of parapsychology. Among his research interests were extrasensory perception, psychokinesis, mediumship and poltergeists. Much o ...
, and
Helmut Schmidt Helmut Heinrich Waldemar Schmidt (; 23 December 1918 – 10 November 2015) was a German politician and member of the Social Democratic Party of Germany (SPD), who served as the chancellor of West Germany from 1974 to 1982. Before becoming Ch ...
did not rule out the possibility of sensory cues or trickery. In the 20th century, J. B. Rhine carried out experiments into ESP. His experiments were discredited due to the discovery that sensory leakage or cheating could account for all his results such as the subject being able to read the symbols from the back of the cards and being able to see and hear the experimenter to note subtle clues.
Terence Hines Terence Hines (born 22 March 1951) is a professor of psychology at Pace University, New York, and adjunct professor of neurology at the New York Medical College; he is also a science writer. Hines has a BA from Duke University, and an MA and ...
has written:
The methods the Rhines used to prevent subjects from gaining hints and clues as to the design on the cards were far from adequate. In many experiments, the cards were displayed face up, but hidden behind a small wooden shield. Several ways of obtaining information about the design on the card remain even in the presence of the shield. For instance, the subject may be able sometimes to see the design on the face-up card reflected in the agent's glasses. Even if the agent isn't wearing glasses it is possible to see the reflection in his cornea.
Once Rhine took precautions in response to criticisms of his methods, he was unable to find any high-scoring subjects. Due to the methodological problems, parapsychologists no longer utilize card-guessing studies. Rhine's experiments into
psychokinesis Psychokinesis (from grc, ψυχή, , soul and grc, κίνησις, , movement, label=ㅤ), or telekinesis (from grc, τηλε, , far off and grc, κίνησις, , movement, label=ㅤ), is a hypothetical psychic ability allowing a person ...
(PK) were also criticized.
John Sladek John Thomas Sladek (December 15, 1937 – March 10, 2000) was an American science fiction author, known for his satirical and surreal novels. Life and work Born in Waverly, Iowa, in 1937, Sladek was in England in the 1960s for the New Wave ...
wrote:
His research used
dice Dice (singular die or dice) are small, throwable objects with marked sides that can rest in multiple positions. They are used for generating random values, commonly as part of tabletop games, including dice games, board games, role-playing g ...
, with subjects 'willing' them to fall a certain way. Not only can dice be drilled, shaved, falsely numbered and manipulated, but even straight dice often show bias in the long run. Casinos for this reason retire dice often, but at Duke, subjects continued to try for the same effect on the same dice over long experimental runs. Not surprisingly, PK appeared at Duke and nowhere else.
John Sladek John Thomas Sladek (December 15, 1937 – March 10, 2000) was an American science fiction author, known for his satirical and surreal novels. Life and work Born in Waverly, Iowa, in 1937, Sladek was in England in the 1960s for the New Wave ...
. (1974). ''The New Apocrypha: A Guide to Strange Sciences and Occult Beliefs''. Panther. pp. 172-174
The Turner-Owenby long-distance
telepathy Telepathy () is the purported vicarious transmission of information from one person's mind to another's without using any known human sensory channels or physical interaction. The term was first coined in 1882 by the classical scholar Frederic ...
experiment was discovered to contain flaws. Frances May Turner positioned herself in the Duke Parapsychology Laboratory whilst Sarah Owenby claimed to receive transmissions 250 miles away. For the experiment, Turner would think of a symbol and write it down whilst Owenby would write her guesses. The scores were highly successful and both records were supposed to be sent to J. B. Rhine, however, Owenby sent them to Turner. Critics pointed out this invalidated the results as she could have simply written her own record to agree with the other. When the experiment was repeated and the records were sent to Rhine the scores dropped to average. A famous ESP experiment at
Duke University Duke University is a private research university in Durham, North Carolina. Founded by Methodists and Quakers in the present-day city of Trinity in 1838, the school moved to Durham in 1892. In 1924, tobacco and electric power industrialist Jame ...
was performed by Lucien Warner and Mildred Raible. The subject was locked in a room with a switch controlling a signal light elsewhere, which he could signal to guess the card. Ten runs with ESP packs of cards were used and he achieved 93 hits (43 more than chance). Weaknesses with the experiment were later discovered. The duration of the light signal could be varied so that the subject could call for specific symbols and certain symbols in the experiment came up far more often than others which indicated either poor shuffling or card manipulation.


Ganzfeld experiment

The
Ganzfeld experiment A ganzfeld experiment (from the German words for “entire” and “field”) is an assessment used by parapsychologists that they contend can test for extrasensory perception (ESP) or telepathy. In these experiments, a "sender" attempts to me ...
studies that were examined by Ray Hyman and
Charles Honorton Charles Henry Honorton (February 5, 1946 – November 4, 1992) was an American parapsychologist and was one of the leaders of a collegial group of researchers who were determined to apply established scientific research methods to the examination ...
had methodological problems that were well documented. Honorton reported only 36% of the studies used duplicate target sets of pictures to avoid handling cues. Hyman discovered flaws in all of the 42 Ganzfeld experiments and to assess each experiment, he devised a set of 12 categories of flaws. Six of these concerned statistical defects, the other six covered procedural flaws such as inadequate
documentation Documentation is any communicable material that is used to describe, explain or instruct regarding some attributes of an object, system or procedure, such as its parts, assembly, installation, maintenance and use. As a form of knowledge manageme ...
, randomization and security as well as possibilities of sensory leakage.
Ray Hyman Ray Hyman (born June 23, 1928) is a Professor Emeritus of Psychology at the University of Oregon in Eugene, Oregon, and a noted critic of parapsychology. Hyman, along with James Randi, Martin Gardner and Paul Kurtz, is one of the founders of the ...
. ''Evaluating Parapsychological Claims'' in Robert J. Sternberg, Henry L. Roediger, Diane F. Halpern. (2007). ''Critical Thinking in Psychology''. Cambridge University Press. pp. 216-231.
Over half of the studies failed to safeguard against sensory leakage and all of the studies contained at least one of the 12 flaws. Because of the flaws, Honorton agreed with Hyman the 42 Ganzfeld studies could not support the claim for the existence of psi. Possibilities of sensory leakage in the Ganzfeld experiments included the receivers hearing what was going on in the sender's room next door as the rooms were not soundproof and the sender's fingerprints to be visible on the target object for the receiver to see. Hyman also reviewed the auto-Ganzfeld experiments and discovered a pattern in the data that implied a visual cue may have taken place: Hyman wrote the autoGanzfeld experiments were flawed because they did not preclude the possibility of sensory leakage.


Remote viewing

The psychologists
David Marks David Lee Marks (born August 22, 1948) is an American guitarist who is best known for being an early member of the Beach Boys. While growing up in Hawthorne, California, Marks was a neighborhood friend of the original band members and was a freq ...
and Richard Kammann attempted to replicate
Russell Targ Russell Targ (born April 11, 1934) is an American physicist, parapsychologist and author who is best known for his work on remote viewing. Targ joined Stanford Research Institute (SRI) in 1972 where he and Harold E. Puthoff coined the term "re ...
and
Harold Puthoff Harold E. Puthoff (born June 20, 1936) is an American parapsychologist and electrical engineer. In the 2010s, he co-founded the company To the Stars with Tom DeLonge. Biography Puthoff was born in Chicago, Illinois. He receive his BA and MSc i ...
's remote viewing experiments. In a series of thirty-five studies, they were unable to replicate the results so investigated the procedure of the original experiments. Marks and Kammann discovered that the notes given to the judges in Targ and Puthoff's experiments contained clues as to which order they were carried out, such as referring to yesterday's two targets, or they had the date of the session written at the top of the page. They concluded that these clues were the reason for the experiment's high hit rates. According to
Terence Hines Terence Hines (born 22 March 1951) is a professor of psychology at Pace University, New York, and adjunct professor of neurology at the New York Medical College; he is also a science writer. Hines has a BA from Duke University, and an MA and ...
:
Thomas Gilovich Thomas Dashiff Gilovich (born January 16, 1954) an American psychologist who is the Irene Blecker Rosenfeld Professor of Psychology at Cornell University. He has conducted research in social psychology, decision making, behavioral economics, and ...
has written: According to Marks, when the cues were eliminated the results fell to a chance level. Marks was able to achieve 100 per cent accuracy without visiting any of the sites himself but by using cues.
James Randi James Randi (born Randall James Hamilton Zwinge; August 7, 1928 – October 20, 2020) was a Canadian-American stage magician, author and scientific skeptic who extensively challenged paranormal and pseudoscientific claims. Rodrigues 2010p. ...
has written controlled tests by several other researchers, eliminating several sources of cuing and extraneous evidence present in the original tests, produced negative results. Students were also able to solve Puthoff and Targ's locations from the clues that had inadvertently been included in the transcripts. Marks and Kamman concluded: "Until remote viewing can be confirmed in conditions which prevent sensory cueing the conclusions of Targ and Puthoff remain an unsubstantiated hypothesis." In 1980,
Charles Tart Charles T. Tart (born 1937) is an American psychologist and parapsychologist known for his psychological work on the nature of consciousness (particularly altered states of consciousness), as one of the founders of the field of transpersonal psy ...
claimed that a rejudging of the transcripts from one of Targ and Puthoff's experiments revealed an above-chance result. Targ and Puthoff again refused to provide copies of the transcripts and it was not until July 1985 that they were made available for study when it was discovered they still contained sensory cues. Marks and Christopher Scott (1986) wrote "considering the importance for the remote viewing hypothesis of adequate cue removal, Tart's failure to perform this basic task seems beyond comprehension. As previously concluded, remote viewing has not been demonstrated in the experiments conducted by Puthoff and Targ, only the repeated failure of the investigators to remove sensory cues."
David Marks David Lee Marks (born August 22, 1948) is an American guitarist who is best known for being an early member of the Beach Boys. While growing up in Hawthorne, California, Marks was a neighborhood friend of the original band members and was a freq ...
, Christopher Scott. (1986). ''Remote Viewing Exposed''. Nature 319: 444.


References

{{DEFAULTSORT:Sensory Leakage Paranormal terminology Parapsychology