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Parapsychology is the study of the evidence of mental awareness or influence of external objects without interaction from known physical means. Most objects of study fall within the realm of "mind-to-mind" influence (such as extra-sensory perception and telepathy), "mind-to-environment" influence (such as psychokinesis), and "environment-to-mind" (such as hauntings).
The premiere professional organization, the Parapsychological Association (PA), is a member in good standing of the American Academy for the Advancement of Science (AAAS). However, the scientific validity of parapsychology research is a matter of frequent dispute and criticism.
The phenomena in question fall into two broad groups.
Extra-sensory perception (ESP) is also known as anomalous cognition, and includes telepathy, clairvoyance, clairaudience, clairalience, clairgustance, clairsentience, precognition, postcognition, psychometry, and dream transference.
Anomalous operation includes psychokinesis (in the past referred to as telekinesis), out-of-body experiences, astral projection, near-death experiences, mediumship, and reincarnation.
The general term "psi phenomena" (or the somewhat older term, "psychic phenomena," which was said to be the "psi factor" in an experiment) covers all of these categories.
The standing of the field of parapsychology has always been controversial within the scientific community.
As its name indicates, parapsychology is sometimes considered a sub-branch of psychology, and this has arisen historically since it involved the study of apparently mental faculties. In its modern form, parapsychology is an interdisciplinary field, which has attracted physicists, engineers, and biologists, as well as psychologists and those from other sciences. (For an argument that parapsychological phenomena may not in fact be psychological, see Peter J. King's "Parapsychology without the 'Para' (or the 'Psychology')" (Think 3, 2003, pp 43 53).) Parapsychology often involves the use of new and untested technologies and methods such as; neurofeedback, NLP, and past life regression etc. As such, it may yet earn the right to be included as a modern and proper science.
Many people are not satisfied with the term, and have proposed alternatives, such as "psi research" (similar to the older term "psychical research"), but parapsychology is the term that has gained the greatest acceptance today.
In the scientific disciplines there is a belief that all claims should be treated with scientific skepticism. Mainstream science believes that after examining psi claims for over a century, there has been significant difficulty in merging the results of parapsychology studies with other fields of science. As a result, many in the scientific community think that parapsychology is not a real science, that psi phenomena do not exist, and that parapsychology is a pseudoscience. Many scientists and skeptical observers of the field believe that some parapsychologists knowingly commit fraud; that some are incompetent; and that some are naïve and therefore easily deceived by fraudulent participants; or perhaps some combination of the above.
Parapsychologists disagree with this assessment. Many have been formally trained in science, and are familiar with the scientific method. Statistician Jessica Utts has shown in a number of papers that:
The precise percentage of scientists holding negative views about parapsychology is unclear, since surveys targeting this group are far less common than those targeting the general population. In his article Save Our Science: Paranormal Phenomena and Zetetics, skeptic Henri Broch complains:
Some skeptics believe that there is a tendency for parapsychology researchers to select "good days" and discard "bad days" for the people in the test samples. But the "Theory of Runs" shows that the chance of a long run of successes (or failures) increases drastically when the periods of success or failure are selected as part of a larger sample. See: Feller, William (1968), An Introduction to Probability Theory and Its Applications, vol. I, John Wiley & Sons, New York, NY, p. 86. For a more recent discussion of the theory and the "arcsine law" see [1] or [2] Unfortunately, what many skeptics are not aware of, is that the criticisms raised by statisticians like Feller are out of date by many decades. That is, the prevailing experimental methodology and conventions of statistical analysis in parapsychology have not been susceptible to such critiques since the 1940s and 1950s when Feller first raised his criticisms. See the chapter called "Field Guide to Skepticism"[3]in Dean Radin's (1997) Conscious Universe: The Scientific Truth of Psychic Phenomena" for a review of such out-to-date criticism. Radin's book also provides a review of experimental parapsychology up to 1997 that contradicts the "party-line" that many skeptics uncritically follow without having first-hand knowledge of the research literature of the field. (See Rochus Boerner's article "The Objectivity of Science: Seven Signs of Bogus Skepticism" for some examples of skepticism/criticisms raised without a familiarity with the research literature of a field [4].)
Wagner and Monnet conducted a survey of 1100 college professors in 1979 and found that 34% of psychologists, 55% of natural scientists, 66% of other social scientists, and 77% of professors in the humanities believe that ESP is either an established fact or likely possibility. (Zetetic Scholar 5, 1979) Andrew Greeley, a sociologist from the University of Arizona, studied surveys on belief in ESP from from 1978 through 1987, and studied the mental health of believers in ESP. The surveys he studied showed that from 1978 through 1987, the number of American adults who reported psychic experiences rose from 58% to 67%. He also tested the psychological well-being of people reporting mystical experiences with the "Affect Balance Scale" and found that people reporting mystical experiences received top scores. Greeley summarized his findings by writing,
The Parapsychological Association [6]is an affiliate of the American Association for the Advancement of Science (AAAS). There are chairs, centers, or research units concerned with parapsychology in whole or in part at many universities around the world, as well as independent laboratories involved in parapsychology. For example, the Koestler Parapsychology Unit in the School of Psychology, Philosophy and Linguistic Sciences at the University of Edinburgh [7], the Parapsychology Unit of the Psychology Department at Liverpool Hope University [8], the Consciousness and Transpersonal Psychology Unit at Liverpool John Moores University [9], the Center for the Study of Anomalous Psychological Processes at University College Northampton [10], the Mind-Matter Unification Project at Cambridge University [11], and the Institut für Grenzgebiete der Psychologie und Psychohygiene of Frieburg University [12], among others. Links to other research organizations, university units, periodicals is available under the "Psi Info" section of the website of the Parapsychology Foundation [13]. Many members of these units, while not considered to be skeptics per se, investigate the phenomena of the field from the point of view of conventional hypotheses, that is, looking at psychological correlates of reports of experiences, "successful" performances in laboratory tests, as well as looking for evidentially-supported extensions to current knowledge in physics, physiology, neuropsychology and other disciplines. The bulk of the refinements to the methodological repertoire of the field of parapsychology -- both in terms of experimental method and in terms of statistical and other evaluative techniques -- have come from this segment of the community, that is, from the so-called "proponents".
A few parapsychologists are skeptics, for example Chris French and his colleagues at the Anomalistic Psychology Research Unit at Goldsmiths College in London, and Richard Wiseman and his colleagues at the Perrott-Warrick Research Unit in the Psychology Department of the University of Hertfordshire, both of which units include individuals who are members of the Parapsychological Association. These researchers do not approach the field with a belief in the paranormal, but are rather interested in the purely psychological aspects of those who report paranormal experiences, along with the study of the psychology of deception, hallucination, etc. These researchers also have provided their own guidelines and input to other parapsychologists for the design of experiments and how to properly test those who claim psychic abilities. While some of these guidelines have been useful, many have suffered from a naive understanding of scientific practice in general and in parapsychology in particular, from a distorted view of the methodology actually in use in the field, and the unfortunate habit of some skeptics to make sweeping statements about the applicability of counter-hypotheses to lines of research without actually investigating the appropriateness of those counter-hypotheses to the details at hand. (See, for example a mostly-positive review of one of these guidelines written by skeptics[14].)
The most important point that both proponents and skeptics raise is the need to be critical of the theory, methods, and conclusions of any one who investigates or comments on parapsychology as a science, no matter what point of view they represent. In order to be an objective professional, one must have a first-hand knowledge of the vast past and present published scientific literature in the field, primary and scholarly sources of its age whenever possible, and -- even more important -- have first-hand experience as an experimenter or investigator and a respect for the art of conjuring and its masters. The hands-on approach is essential to scientific progress in the field, whether one approaches it from a "paranormalist" or a "conventional theorist" point of view. Selective and historically uninformed armchair cheerleading and armchair skepticism are equally useless in all fields of inquiry and science.
Many scientists hold that the entire body of evidence to date is of poor quality and not properly controlled; in their view, the entire field of parapsychology has produced no results whatsoever. Frequently, however, those who hold this view have not had any contact with the published literature of the field such as that which can be found in the Journal of Parapsychology, the Journal of the Society for Psychical Research, the Journal of the American Society for Psychical Research, or in the proceedings of the annual convention of the Parapsychological Association. Instead, they have relied on the analyses made by members of the skeptical community who, wrongly, assume that all parapsychological experiments suffer from flaws and therefore no parapsychological experiment may be considered evidential even in the weak sense of the term. Working psi researchers welcome criticisms that are based on knowledge of the peer-reviewed, published literature of the field. Criticism and blanket statements based on hearsay are not productive and not encouraged in any area of science.
Other scientists hold that there is a small amount of data from properly controlled experiments that can be trusted for a small number of psi phenomena. They hold that this evidence is not definitive, but suggestive enough to warrant further research.
Other scientists, who are familiar with the published literature of the field of parapsychology, believe that a great deal of evidence has been collected, which, if it addressed more conventional phenomena, would be sufficient to provide proof.
The opinion of parapsychologists regarding the overall evaluation of the body of evidence to date is divided. As noted above, some parapsychologists are skeptic and do not believe that there is anything observed so far which cannot ultimately be explained within the existing framework of known science. Probably a majority of parapsychologists believe in the likelihood, or at least the possibility, of actual psi phenomena, though there is a range of attitudes toward the evidence.
Regarding the evidence, the rule of the thumb of the skeptical community is that extraordinary claims require extraordinary evidence. Since skeptics may consider paranormal claims extraordinary, they may think that the evidence needs to be better than what normally would be required. However, this puts the responsibility for investigating seemingly paranormal phenomena squarely on the shoulders of proponents and "internal" skeptics. Not only is research conducted by "external" critics and skeptics useful to the field as a whole, but it also imparts a kind of craft knowledge to critics and skeptics that makes their criticism and counter-hypotheses more productive and more useful. Further many of the counter-hypotheses proposed by skeptics are so unparsimonious as to be extraordinary claims as well, and in that case, those counter-hypothesis, also require extraordinary evidence. Sadly, given the Zeitgeist in science today which treats even the study of seemingly paranormal phenomena as taboo, the extraordinary/unparsimonious claims of the skeptics are accepted uncritically, without investigation. See an article by the late sociologist and skeptic Marcello Truzzi which is relevant to this topic [15].
Most people use this approach to evidence in everyday life. For instance, if the news reports that the president of the USA has just arrived in South Korea for a state visit, most people will take this at face value. The news is considered a fairly reliable source of information, and the president visiting a country such as South Korea is not an extraordinary claim. However, if the same news broadcast later mentioned that a 92-year-old man has improved the world record time on the marathon by half an hour, many reasonable people would require more evidence, even despite the assumed reliability of the source, since the claim is extraordinary. This analogy might be flawed, however. In the case of the 92 year old man, we have positive evidence gained from a lifetime of experience and the reassurance of physiologists that this feat is indeed extraordinary (i.e., improbable). When it comes to parapsychology, however, some would argue we have no positive evidence that it is improbable, only our own cultural bias and a subjective sense that Psionic powers are extraordinary. Hence, some would argue, it is not the sort of extraordinary claim which necessarily needs more evidence than a mundane claim.
Some parapsychologists agree with critics that the field has not yet reached the degree of consistent repeatability of experimental results needed for general consensus. John Beloff, in his book Parapsychology: A Concise History, notes the evanescent – some have said the apparently evasive – nature of psychic phenomena over time, and that the range of phenomena observable in a given era seems to be culturally dependent.
For example, in earlier times, psychic research studied physical phenomena demonstrated by spiritualist mediums that, according to the reports passed down to us in the literature, far surpassed anything that any of today's "psychics" can demonstrate. Skeptics consider this more evidence of the non-existence of psi phenomena. Frequently this particular claim is the result of the proponent community having cut itself off, because of political pressures of conforming to the scientific Zeitgeist, from the community of modern mediums and psychics who operate today. Whether or not the phenomena being exhibited by modern day mediums can provide proof of traditional notions of spirituality or can be attributed to the operation of mundane psychological processes is mostly an open question, due to the lack of research. So it is possible that physical phenomena is being exhibited today, but to what cause the effects may be attributed is an open question, even among parapsychologists.
Yet many people, such as Beloff, cannot easily dismiss the entirety of all the positive accounts – so many of which came from the experts of their day (including scientists and conjurers), many of whom began as noted skeptics – and so believe that continued research in the field is justified.
Other parapsychologists, such as Dean Radin and supporters such as statistician Jessica Utts, take the stance that the existence of certain psi phenomena has been reasonably well established in recent times through repeatable experiments that have been replicated dozens to hundreds of times at labs around the world.
They refer to meta-analyses of psi experiments that conclude that the odds against chance (null hypothesis) of experimental results far exceeds that commonly required to establish results in other fields, sometimes by orders of magnitude.
Indeed, many parapsychologists have moved on from proof-oriented research, intended primarily to verify the existence of psi phenomena, to "process-oriented" research, intended to explore the parameters and characteristics of psi phenomena. Time will tell whether these results prove to be evanescent as well. Unfortunately, what complicates the "time will tell" hope that many skeptics and proponents have is the lack of funds available for research from either the conventional or the "paranormalist" perspectives, and the negative impact on career advancement that an interest in these phenomena -- even from a skeptical point of view -- can have.
The offering of prizes for demonstrations is not new to the field. Circa 1924, Scientific American magazine offered a $5000 prize to anyone who could produce any "visible psychic manifestation." Medium Mina Crandon, known in the literature as "Margery," made a bid and was tested by a committee set up by the editorial staff. Her performance was such that the committee members were split, four negative to one positive in their opinions. The magazine published the mixed report in its November 1924 issue, no prize was awarded, and the competition was declared closed the following year. In the early 1900s, the then well-known stage magician Howard Thurston was impressed by the mysterious table lifting demonstrations of medium Eusapia Palladino. He advertised in the New York Times his offer of $1000 to charity in the name of any fellow conjuror who could duplicate this feat. He had no takers. In 1910 Eusapia Palladino publicily acknowledged she used tricks to an American reporter. Today many methods of table lifting and other seance secrets are well known to master conjurors, but kept secret as demanded by their art.
There are a variety of other objections to parapsychology as well.
Even "insiders" in the parapsychological community worry about the possible harm that naive belief in paranormal phenomena can have on individuals, on culture and on societies. A great deal of effort has been put into the notion of developing expertise in dealing with reported experiences both in a clinical sense, and as a topic of investigation. Unfortunately organized skepticism and the "taboo" that exists against serious research on such phenomena has impeded the ability of many researchers -- both skeptics and proponents -- from doing the kinds of research that would allow evidence-based therapeutic interventions.
Although under the heading 'paranormal phenomena' the report lists topics such as astrology, UFOs, and the Loch Ness Monster, it also lumps in belief in ESP and, by implication, most parapsychology.
See history of parapsychology.
The following are famous primarily for fields other than parapsychology but still had important working interests in the field: