This is a list of topics that have, at one point or another in their history, been characterized as pseudoscience by academics or researchers. Discussion about these topics is done on their main pages. These characterizations were made in the context of educating the public about questionable or potentially fraudulent or dangerous claims and practices—efforts to define the nature of science, or humorous parodies of poor scientific reasoning.
Criticism of pseudoscience, generally by the scientific community or skeptical organizations, involves critiques of the logical, methodological, or rhetorical bases of the topic in question. Though some of the listed topics continue to be investigated scientifically, others were only subject to scientific research in the past, and today are considered refuted but resurrected in a pseudoscientific fashion. Other ideas presented here are entirely non-scientific, but have in one way or another impinged on scientific domains or practices.
Many adherents or practitioners of the topics listed here dispute their characterization as pseudoscience. Each section here summarizes the alleged pseudoscientific aspects of that topic.
Astronomy and space sciences
- 2012 millenarianism – a range of eschatological beliefs that cataclysmic or otherwise transformative events would occur on or around 21 December 2012. This date was regarded as the end-date of a 5,126-year-long cycle in the Mesoamerican Long Count calendar and as such, festivities to commemorate the date took place on 21 December 2012 in the countries that were part of the Maya civilization (Mexico, Guatemala, Honduras, and El Salvador), with main events at Chichén Itzá in Mexico, and Tikal in Guatemala. Professional Mayanist scholars stated that no extant classic Maya accounts forecast impending doom, and that the idea that the Long Count calendar ends in 2012 misrepresented Maya history and culture, while astronomers rejected the various proposed doomsday scenarios easily refuted by elementary astronomical observations.
- Ancient astronauts – a concept based on the belief that intelligent extraterrestrial beings visited Earth and made contact with humans in antiquity and prehistoric times. Proponents suggest that this contact influenced the development of modern cultures, technologies, and religions. A common claim is that deities from most, if not all, religions are actually extraterrestrial in origin, and that advanced technologies brought to Earth by ancient astronauts were interpreted as evidence of divine status by early humans. The idea that ancient astronauts existed is not taken seriously by academics, and has received no credible attention in peer reviewed studies.
- Anunnaki from Nibiru (Sitchin) (variant) – Zecharia Sitchin proposed in his series The Earth Chronicles, beginning with The 12th Planet (1976) revolves around Sitchin's unique interpretation of ancient Sumerian and Middle Eastern texts, megalithic sites, and artifacts from around the world. He hypothesizes that the gods of old Mesopotamia were actually astronauts from the planet "Nibiru", which Sitchin claims the Sumerians believed to be a remote "12th planet" (counting the Sun, Moon, and Pluto as planets) associated with the god Marduk. According to Sitchin, Nibiru continues to orbit our sun on a 3,600-year elongated orbit.
- Ancient astronauts from the Sirius star-system (Temple) (variant) – Robert K. G. Temple's proposal in his book The Sirius Mystery (1976) argues that the Dogon people of northwestern Mali preserved an account of extraterrestrial visitation from around 5,000 years ago. He quotes various lines of evidence, including supposed advanced astronomical knowledge inherited by the tribe, descriptions, and comparative belief systems with ancient civilizations such as ancient Egypt and Sumer.
- Astrology (see also astrology and science) – consists of a number of belief systems that hold that there is a relationship between astronomical phenomena and events or descriptions of personality in the human world. Several systems of divination are based on the relative positions and movement of various real and construed celestial bodies. Scientific testing of astrology has been conducted, and no evidence has been found to support the premises or purported effects outlined in astrological traditions. Where astrology has made falsifiable predictions, it has been falsified.:424
- Creationist cosmologies are explanations of the origins and form of the universe in terms of the Genesis creation narrative (Genesis 1), according to which the God of the Bible created the cosmos in eight creative acts over the six days of the "creation week".
- Dogon people and Sirius B – a series of claims that the Dogon tribe knew about the white dwarf companion of Sirius despite it being invisible to the naked eye (and knew about it for reasons other than being told about it by visiting Europeans).
- The Face on Mars is a rock formation in Cydonia Mensae on Mars asserted to be evidence of intelligent, native life on the planet. High-resolution images taken recently show it to appear less face-like. It features prominently in the works of Richard C. Hoagland and Tom Van Flandern.
- Lunar effect – the belief that the full Moon influences human behavior.
- Modern flat Earth beliefs propose that the earth is a flat, disc-shaped planet that accelerates upward, producing the illusion of gravity. Proposers of a flat Earth, such as the Flat Earth Society, do not accept compelling evidence, such as photos of planet Earth from space.
- Modern geocentrism – In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a superseded description of the universe with the Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all circled Earth. The geocentric model served as the predominant description of the cosmos in many ancient civilizations, such as those of Aristotle and Ptolemy.
- Moon landing conspiracy theories – claim that some or all elements of the Apollo program and the associated Moon landings were hoaxes staged by NASA with the aid of other organizations. The most notable claim is that the six manned landings (1969–72) were faked and that twelve Apollo astronauts did not actually walk on the Moon. Various groups and individuals have made claims since the mid-1970s, that NASA and others knowingly misled the public into believing the landings happened, by manufacturing, tampering with, or destroying evidence including photos, telemetry tapes, radio and TV transmissions, Moon rock samples, and even some key witnesses.
- Nibiru cataclysm – a prediction first made by contactee Nancy Lieder that a mythological planet Nibiru would collide with Earth. After having adjusted her prediction many times, she later claimed the year of the occurrence to be 2012. In 2017, a conspiracy theorist known as David Meade claimed 2017 was the year Nibiru would hit.
- Vaimānika Shāstra – claim that airplanes were invented in ancient India during the Vedic period. A 1974 study by researchers at the Indian Institute of Science, Bangalore found that the heavier-than-air aircraft that the Vaimānika Shāstra described were aerodynamically unfeasible. The authors remarked that the discussion of the principles of flight in the text were largely perfunctory and incorrect, in some cases violating Newton's laws of motion.
- Worlds in Collision – writer Immanuel Velikovsky proposed in his book Worlds in Collision that ancient texts and geographic evidence show mankind was witness to catastrophic interactions of other planets in our Solar system.
- 366 geometry or Megalithic geometry – posits the existence of an Earth-based geometry dating back to at least 3500 BC, and the possibility that such a system is still in use in modern Freemasonry. According to proponents, megalithic civilizations in Britain and Brittany had advanced knowledge of geometry, mathematics, and the size of the Earth. The megalithic yard is correlated to the polar circumference of Earth using a circle divided into 366 degrees.
- The Bermuda Triangle – a region of the Atlantic Ocean that lies between Bermuda, Puerto Rico, and (in its most popular version) Florida. Ship and aircraft disasters and disappearances perceived as frequent in this area have led to the circulation of stories of unusual natural phenomena, paranormal encounters, and interactions with extraterrestrials.
- Climate change denial – involves denial, dismissal, unwarranted doubt or contrarian views which depart from the scientific consensus on climate change, including the extent to which it is caused by humans, its impacts on nature and human society, or the potential of adaptation to global warming by human actions.
- Flood geology – creationist form of geology that advocates most of the geologic features on Earth are explainable by a global flood.
- Hollow Earth – a proposal that Earth is either entirely hollow or consists of hollow sections beneath the crust. Certain folklore and conspiracy theories hold this idea and suggest the existence of subterranean life.
- Free energy – a class of perpetual motion that purports to create energy (violating the first law of thermodynamics) or extract useful work from equilibrium systems (violating the second law of thermodynamics).
- Water-fueled cars – an instance of perpetual motion machines. Such devices are claimed to use water as fuel or produce fuel from water on board with no other energy input.
- Gasoline pill, which was claimed to turn water into gasoline.
- Hongcheng Magic Liquid – a scam in China where Wang Hongcheng (Chinese: 王洪成; pinyin: Wáng Hóngchéng), a bus driver from Harbin with no scientific education, claimed in 1983 that he could turn regular water into a fuel as flammable as petrol by simply dissolving a few drops of his liquid in it.
- Hydrinos – a supposed state of the hydrogen atom that, according to its proponent, is of lower energy than ground state and has extremely high efficiency as a fuel.
- E-Cat – a claimed cold fusion reactor.
- Orgone – a pseudoscientific concept described as an esoteric energy or hypothetical universal life force, originally proposed in the 1930s.
- Autodynamics – a physics theory proposed in the 1940s that claims the equations of the Lorentz transformation are incorrectly formulated to describe relativistic effects, which would invalidate Einstein's theories of special relativity and general relativity, and Maxwell's equations.
- Einstein–Cartan–Evans theory – a unified theory of physics proposed by Myron W. Evans which claims to unify general relativity, quantum mechanics and electromagnetism. The hypothesis was largely published in the journal Foundations of Physics Letters between 2003 and 2005; in 2008, the editor published an editorial note effectively retracting the journal's support for the hypothesis.
- Electrogravitics – claimed to be an unconventional type of effect or anti-gravity propulsion created by an electric field's effect on a mass. The name was coined in the 1920s by Thomas Townsend Brown, who first described the effect and spent most of his life trying to develop it and sell it as a propulsion system.
- Lysenkoism, or Lysenko-Michurinism – was a political campaign against genetics and science-based agriculture conducted by Trofim Lysenko, his followers and Soviet authorities. Lysenko served as the director of the Soviet Union's Lenin All-Union Academy of Agricultural Sciences. Lysenkoism began in the late 1920s and formally ended in 1964. The pseudo-scientific ideas of Lysenkoism built on Lamarckian concepts of the heritability of acquired characteristics. Lysenko's theory rejected Mendelian inheritance and the concept of the "gene"; it departed from Darwinian evolutionary theory by rejecting natural selection.
- Biodynamic agriculture – method of organic farming that treats farms as unified and individual organisms. Biodynamics uses a calendar which has been characterized as astrological. The substances and composts used by biodynamicists have been described as unconventional and homeopathic. For example, field mice are countered by deploying ashes prepared from field mice skin when Venus is in the Scorpius constellation.
- Feng shui – ancient Chinese system of mysticism and aesthetics based on astronomy, geography, and the putative flow of qi. Evidence for its effectiveness is based on anecdote, and there is a lack of a plausible method of action; this leads to conflicting advice from different practitioners of feng shui. Feng shui practitioners use this as evidence of variations or different schools; critical analysts have described it thus: "Feng shui has always been based upon mere guesswork." Modern criticism differentiates between feng shui as a traditional proto-religion and the modern practice: "A naturalistic belief, it was originally used to find an auspicious dwelling place for a shrine or a tomb. However, over the centuries it... has become distorted and degraded into a gross superstition."
- Ley lines – proposed intentional alignment of ancient monuments and landscape features was later explained by random chance. Additional New Age and feng shui concepts have been proposed building on the original concept, and pseudo-scientific claims about energy flowing through the lines have been made.
- Vastu shastra is the ancient Hindu system of architecture, which lays down a series of rules for building houses in relation to ambiance. Scientists like Jayant Narlikar write that it has no "logical connection" with the environment and notes that sometimes what has already been built is demolished and rebuilt to accommodate the rules. In another instance a minister ordered the demolition of a slum to change the entrance of his office, as per Vastu consultants who claimed that changing the entrance to an east-facing gate would solve his political problems.
- Technical analysis is a security analysis methodology for forecasting the direction of prices through the study of past market data, primarily price and volume. Behavioral economics and quantitative analysis use many of the same tools of technical analysis, which, being an aspect of active management, stands in contradiction to much of modern portfolio theory. The efficacy of both technical and fundamental analysis is disputed by the efficient-market hypothesis which states that stock market prices are essentially unpredictable. It is still considered by many academics to be pseudoscience. Academics such as Eugene Fama say the evidence for technical analysis is sparse and is inconsistent with the weak form of the efficient-market hypothesis.
Health and medicine
- Acupuncture – use of fine needles to stimulate acupuncture points and balance the flow of qi. There is no known anatomical or histological basis for the existence of acupuncture points or meridians. Some acupuncturists regard them as functional rather than structural entities, useful in guiding evaluation and care of patients. Dry needling is the therapeutic insertion of fine needles without regard to traditional Chinese medicine (TCM) knowledge. Acupuncture has been the subject of active scientific research since the late 20th century, and its effects and application remain controversial among medical researchers and clinicians. Because it is a procedure rather than a pill, the design of controlled studies is challenging, as with surgical and other procedures. Some scholarly reviews conclude that acupuncture's effects are mainly placebo, and others find likelihood of efficacy for particular conditions.
- Adrenal fatigue or hypoadrenia is a pseudoscientific diagnosis described as a state in which the adrenal glands are exhausted and unable to produce adequate quantities of hormones, primarily the glucocorticoid cortisol, due to chronic stress or infections. Adrenal fatigue should not be confused with a number of actual forms of adrenal dysfunction such as adrenal insufficiency or Addison's disease. The term "adrenal fatigue", which was invented in 1998 by James Wilson, a chiropractor, may be applied to a collection of mostly nonspecific symptoms. There is no scientific evidence supporting the concept of adrenal fatigue and it is not recognized as a diagnosis by any scientific or medical community. A systematic review found no evidence for the term adrenal fatigue, confirming the consensus among endocrinological societies that it is a myth.
- Alternative or fringe medicine is any practice claimed to have the healing effects of medicine that is proven not to work, has no scientific evidence showing that it works, or is solely harmful. Alternative medicine is not a part of medicine, or science-based healthcare systems. It consists of a wide variety of practices, products, and therapies—ranging from those that are biologically plausible but not well tested, to those with known harmful and toxic effects. Despite significant costs in testing alternative medicine, including $2.5 billion spent by the United States government, almost none have shown any effectiveness beyond that of false treatments (placebo). Perceived effects of alternative medicine are caused by the placebo effect, decreased effects of functional treatment (and thus also decreased side-effects), and regression toward the mean where spontaneous improvement is credited to alternative therapies.
- Anthroposophic medicine, or anthroposophical medicine – is a form of alternative medicine. Devised in the 1920s by Rudolf Steiner (1861–1925) in conjunction with Ita Wegman (1876–1943), anthroposophical medicine is based on occult notions and draws on Steiner's spiritual philosophy, which he called anthroposophy. Practitioners employ a variety of treatment techniques based upon anthroposophic precepts, including massage, exercise, counseling, and substances. Many drug preparations used in anthroposophic medicine are ultra-diluted substances, similar to those used in homeopathy. Homeopathic remedies are not medically effective and are generally considered harmless, except when used as a substitute for a scientifically proven and effective cure. In certain European countries, people with cancer are sometimes prescribed remedies made from specially harvested mistletoe, but research has found no convincing evidence of clinical benefit. Some anthroposophic doctors oppose childhood vaccination, and this has led to preventable outbreaks of disease. Professor of complementary medicine Edzard Ernst and other critics have characterized anthroposophic medicine as having no basis in science, pseudoscientific, and quackery.
- Applied kinesiology (AK) – is a technique in alternative medicine claimed to be able to diagnose illness or choose treatment by testing muscles for strength and weakness. According to their guidelines on allergy diagnostic testing, the American College of Allergy, Asthma and Immunology stated there is "no evidence of diagnostic validity" of applied kinesiology, and another study has shown that as an evaluative method, AK "is no more useful than random guessing", and the American Cancer Society has said that "scientific evidence does not support the claim that applied kinesiology can diagnose or treat cancer or other illness".
- Autistic enterocolitis – is the name of a nonexistent medical condition proposed by discredited British gastroenterologist Andrew Wakefield when he suggested a link between a number of common clinical symptoms and signs which he contended were distinctive to autism. The existence of such an enterocolitis has been dismissed by experts as having "not been established". Wakefield's now-retracted and fraudulent report used inadequate controls and suppressed negative findings, and multiple attempts to replicate his results have been unsuccessful. Reviews in the medical literature have found no link between autism and bowel disease.
- Bates method for better eyesight – is an alternative therapy aimed at improving eyesight. Eye-care physician William Horatio Bates, M.D. (1860–1931) attributed nearly all sight problems to habitual strain of the eyes, and felt that glasses were harmful and never necessary. Bates self-published a book, Perfect Sight Without Glasses, as well as a magazine, Better Eyesight Magazine, (and earlier collaborated with Bernarr MacFadden on a correspondence course) detailing his approach to helping people relax such "strain", and thus, he claimed, improve their sight. His techniques centered on visualization and movement. In 1952, optometry professor Elwin Marg wrote of Bates, "Most of his claims and almost all of his theories have been considered false by practically all visual scientists." Marg concluded that the Bates method owed its popularity largely to "flashes of clear vision" experienced by many who followed it. Such occurrences have since been explained as a contact lens-like effect of moisture on the eye, or a flattening of the lens by the ciliary muscles.
- Biological terrain assessment – a set of computerized tests used to measure the pH, resistivity, and redox of a person's urine, blood, and saliva, with the intention of recommending a customized program of health supplements and remedies (such as vitamins, homeopathic supplements, or herbal medicines) based on the results. Proponents suggest that BTA allows for a correction of biological imbalances before they become pathological, while opponents claim that the tests are imprecise and results in incorrect diagnoses.
- Biorhythms – is an attempt to predict various aspects of a person's life through simple mathematical cycles. Most scientists believe that the idea has no more predictive power than chance and consider the concept an example of pseudoscience. For the scientific study of biological cycles such as circadian rhythms, see chronobiology.
- Body memory – is a hypothesis that the body itself is capable of storing memories, as opposed to only the brain. The idea could be pseudoscientific as there are no known means by which tissues other than the brain are capable of storing memories. Body memory is used to explain having memories for events where the brain was not in a position to store memories and is sometimes a catalyst for repressed memory recovery. These memories are often characterised with phantom pain in a part or parts of the body—the body appearing to remember the past trauma. The idea of body memory is a belief frequently associated with the idea of repressed memories, in which memories of incest or sexual abuse can be retained and recovered through physical sensations. Other ideas of body memory can be the transfer of memories from one person to the next through organ donations, the organ carrying past memories to the new receiver of the organ. Another example of body memory is based on decapitated animals that upon regrowing their head seem to recall past memories and training. This may suggest evidence that such means may be available to simpler forms of life.
- Brain Gym – is an organization promoting a series of exercises claimed to improve academic performance. 26 Brain Gym activities are claimed to improve eye teaming (binocular vision), spatial and listening skills, hand–eye coordination, and whole-body flexibility, and by doing this manipulate the brain, improving learning and recall of information. Numerous books have been written describing research and case studies in which use of the Brain Gym activities benefited specific populations, including children recovering from burn injuries and those diagnosed with autism. The Brain Gym activities have been incorporated into many educational, sports, business, and seniors programs throughout the world. They are also widely used in British state schools. The program has been criticised as pseudoscience for the lack of references in some of the theories used in the 1994 Brain Gym: Teacher's Edition (revised in 2010) and for the absence of peer-reviewed research that performing the activities has a direct effect on academic performance.
- Candida hypersensitivity – It has been spuriously claimed that chronic yeast infections are responsible for many common disorders and non-specific symptoms including fatigue, weight gain, constipation, dizziness, muscle and joint pain, asthma, and others. The notion has been strongly disabused by the American Academy of Allergy, Asthma, and Immunology.
- Chiropractic is an alternative medicine practice focused on finding vertebral subluxations and treating them with spinal adjustments. Many modern chiropractors target solely mechanical dysfunction, and offer health and lifestyle counseling. Many others, however, base their practice on the vitalism of D.D. Palmer and B. J. Palmer, maintaining that all or many organic diseases are the result of hypothetical spinal dysfunctions known as vertebral subluxations and the impaired flow of Innate intelligence, a form of putative energy. These ideas are not based in science, and along with the lack of a strong research base are in part responsible for the historical conflict between chiropractic and mainstream medicine. Recent systematic reviews indicate the possibility of moderate effectiveness for spinal manipulation in the management of nonspecific lower back pain. The effectiveness of chiropractic spinal manipulation has not been demonstrated according to the principles of evidence-based medicine for any other condition. Adverse symptomatic events, which are all qualified as relatively mild in the referenced report, with possible neurologic involvement following spinal manipulation, particularly upper spinal manipulation, occur with a frequency of between 33% and 61%. Most events are minor, such as mild soreness, fainting, dizziness, light headedness, headache, or numbness or tingling in the upper limbs; serious complications such as subarachnoid hemorrhage, vertebral artery dissection, or myelopathy are observed infrequently.
- Chronic Lyme disease (not to be confused with Lyme disease) is a generally rejected diagnosis that encompasses "a broad array of illnesses or symptom complexes for which there is no reproducible or convincing scientific evidence of any relationship to Borrelia burgdorferi infection." Despite numerous studies, there is no clinical evidence that "chronic" Lyme disease is caused by a persistent infection. It is distinct from post-treatment Lyme disease syndrome, a set of lingering symptoms which may persist after successful treatment of infection with Lyme spirochetes. The symptoms of "chronic Lyme" are generic and non-specific "symptoms of life".
- Colon cleansing (colonics, colon hydrotherapy) – encompasses several alternative medical therapies intended to remove fecal waste and unidentified toxins from the colon and intestinal tract. Practitioners believe that accumulations of putrefied feces line the walls of the large intestine and that they harbor parasites or pathogenic gut flora, causing nonspecific symptoms and general ill-health. This "auto-intoxication" hypothesis is based on medical beliefs of the Ancient Egyptians and Greeks, and was discredited in the early 20th century.
- Craniosacral therapy – is a form of bodywork or alternative therapy using gentle touch to manipulate the synarthrodial joints of the cranium. A practitioner of cranial-sacral therapy may also apply light touches to a patient's spine and pelvis. Practitioners believe that this manipulation regulates the flow of cerebrospinal fluid and aids in "primary respiration." Craniosacral therapy was developed by John Upledger, D.O. in the 1970s, as an offshoot of osteopathy in the cranial field, or cranial osteopathy, which was developed in the 1930s by William Garner Sutherland. According to the American Cancer Society, although CST may relieve the symptoms of stress or tension, "available scientific evidence does not support claims that craniosacral therapy helps in treating cancer or any other disease." CST has been characterized as pseudoscience and its practice has been called quackery. Cranial osteopathy has received a similar assessment, with one 1990 paper finding there was no scientific basis for any of the practitioners' claims the paper examined.
- Crystal healing – belief that crystals have healing properties. Once common among pre-scientific and indigenous peoples, it enjoyed a resurgence in popularity in the 1970s with the New Age movement.
- Cupping therapy – an ancient Chinese form of alternative medicine in which a local suction is created on the skin; practitioners believe this mobilizes blood flow in order to promote healing. Suction is created using heat (fire) or mechanical devices (hand or electrical pumps). Only one controlled trial of cupping has been conducted, and it did not demonstrate any effectiveness for pain relief. A book by Simon Singh and Edzard Ernst claims that no evidence exists of any beneficial effects of cupping for any medical condition.
- Detoxification – Detoxification in the context of alternative medicine consists of an approach that claims to rid the body of "toxins" – accumulated substances that allegedly exert undesirable effects on individual health in the short or long term. Many mainstream media web sites offer articles on this practice, despite a lack of scientific evidence for either the presence of the toxins, harm from their presence, or efficacy of the removal techniques.
- Ear candling – an alternative medicine practice claimed to improve general health and well-being by lighting one end of a hollow candle and placing the other end in the ear canal. Medical research has shown that the practice is both dangerous and ineffective and does not help remove earwax or toxicants. The claim by one manufacturer that ear candles originated with the Hopi tribe is also false.
- Earthing therapy or Grounding – a therapy that is claimed to ease pain, provide a better night's sleep, and assist in diseases with symptoms of inflammation by being in direct physical contact with the ground or a device connected to electrical ground. Purportedly, the earth has an excess of electrons which people are missing due to insulating shoes and ground cover. Being in electrical contact with the earth provides the body with those excess electrons which then act as antioxidants.
- Electromagnetic hypersensitivity (EHS) – reported sensitivity to electric and magnetic fields or electromagnetic radiation of various frequencies at exposure levels well below established safety standards. Symptoms are inconsistent, but can include headache, fatigue, difficulty sleeping, and similar non-specific indications. Provocation studies find that the discomfort of sufferers is unrelated to hidden sources of radiation, and "no scientific basis currently exists for a connection between EHS and exposure to [electromagnetic fields]."
- Faith healing – act of curing disease by such means as prayer and laying on of hands. No material benefit in excess of that expected by placebo is observed.
- Health bracelets and various healing jewelry that are purported to improve the health, heal, or improve the chi of the wearer, such as ionized bracelets, hologram bracelets, and magnetic jewelry. No claims of effectiveness made by manufacturers have ever been substantiated by independent sources.
- Hexagonal water – A term used in a marketing scam that claims the ability to create a certain configuration of water that is better for the body. The term "hexagonal water" refers to a cluster of water molecules forming a hexagonal shape that supposedly enhances nutrient absorption, removes metabolic wastes, and enhances cellular communication, among other things. Similar to the dihydrogen monoxide hoax, the scam takes advantage of the consumer's limited knowledge of chemistry, physics, and physiology.
- Homeopathy – the belief that a patient with symptoms of an illness can be treated with extremely dilute remedies that are thought to produce those same symptoms in healthy people. These preparations are often diluted beyond the point where any treatment molecule is likely to remain. Studies of homeopathic practice have been largely negative or inconclusive. No scientific basis for homeopathic principles has been substantiated.
- Iridology – means of medical diagnosis which proponents believe can identify and diagnose health problems through close examination of the markings and patterns of the iris. Practitioners divide the iris into 80–90 zones, each of which is connected to a particular body region or organ. This connection has not been scientifically validated, and disorder detection is neither selective nor specific. Because iris texture is a phenotypical feature which develops during gestation and remains unchanged after birth (which makes the iris useful for Biometrics), iridology is all but impossible.
- Leaky gut syndrome – in alternative medicine, a proposed condition caused by the passage of harmful substances outward through the gut wall. It has been proposed as the cause of many conditions including multiple sclerosis and autism, a claim which has been called pseudoscientific. According to the UK National Health Service, the theory is vague and unproven. Some skeptics and scientists say that the marketing of treatments for leaky gut syndrome is either misguided or an instance of deliberate health fraud.
- Lightning Process – a system claimed to be derived from osteopathy, neuro-linguistic programming (NLP) and life coaching. Proponents claim that the Process can have a positive effect on a long list of diseases and conditions, including myalgic encephalomyelitis, despite no scientific evidence of efficacy. The designer of the Lightning Process, Phil Parker, suggests certain illnesses such as ME/CFS arise from a dysregulation of the central nervous system and autonomic nervous system, which the Lightning Process aims to address, helping to break the "adrenaline loop" that keeps the systems' stress responses high.
- Magnet therapy – practice of using magnetic fields to positively influence health. While there are legitimate medical uses for magnets and magnetic fields, the field strength used in magnetic therapy is too low to effect any biological change, and the methods used have no scientific validity.
- Maharishi Ayurveda – traditional Ayurveda is a 5,000-year-old alternative medical practice with roots in ancient India based on a mind-body set of beliefs. Imbalance or stress in an individual's consciousness is believed to be the cause of diseases. Patients are classified by body types (three doshas, which are considered to control mind-body harmony, determine an individual's "body type"); and treatment is aimed at restoring balance to the mind-body system. It has long been the main traditional system of health care in India, and it has become institutionalized in India's colleges and schools, although unlicensed practitioners are common. As with other traditional knowledge, much of it was lost; in the West, current practice is in part based on the teachings of Maharishi Mahesh Yogi in the 1980s, who mixed it with Transcendental Meditation; other forms of Ayurveda exist as well. The most notable advocate of Ayurveda in America is Deepak Chopra, who claims that Maharishi's Ayurveda is based on quantum mysticism.
- Morgellons - is the informal name of a self-diagnosed, unexplained skin condition in which individuals have sores that they believe contain some kind of fibers. Morgellons is poorly characterized but the general medical consensus is that it is a form of delusional parasitosis. An attempt to link Morgellons to the cause of Lyme disease has been attacked by Steven Salzberg as "dangerous pseudoscience".
- Moxibustion – application on or above the skin of smoldering mugwort, or moxa, to stimulate acupuncture points.
- Nambudripad's Allergy Elimination Techniques are a form of alternative medicine which proponents claim can treat allergies and related disorders. The techniques were devised by Devi Nambudripad, a California-based chiropractor and acupuncturist, in 1983, drawing on a combination of ideas from applied kinesiology, acupuncture, acupressure, nutritional management and chiropractic methods. NAET is considered by mainstream medical practitioners to be a pseudoscience. Among alternative practitioners it is considered to be a rather new and small field. There is no mainstream medical evidence to support its effectiveness in assessing or treating allergies.
- Naturopathy, or naturopathic medicine, is a type of alternative medicine based on a belief in vitalism, which posits that a special energy called vital energy or vital force guides bodily processes such as metabolism, reproduction, growth, and adaptation. Naturopathy has been characterized as pseudoscience. It has particularly been criticized for its unproven, disproven, or dangerous treatments. Natural methods and chemicals are not necessarily safer or more effective than artificial or synthetic ones; any treatment capable of eliciting an effect may also have deleterious side effects.
- Negative air ionization therapy is the use of air ionizers as an experimental non-pharmaceutical treatment. It is widely considered pseudoscience.
- Oil pulling – is a folk remedy where oil is "swished" or "held" in the mouth for up to 20 minutes with the goal of improving oral as well as systemic health. It is said that this technique "pulls out" toxins from the body, and is claimed to be able to treat a plethora of conditions from migraines to diabetes.
- Osteopathic manipulative medicine (OMM) or osteopathic manipulative treatment (OMT) – the core technique of osteopathic medicine. OMM is based on a philosophy devised by Andrew Taylor Still (1828–1917) who held that the body had self-regulating mechanisms that could be harnessed through manipulating the bones, tendons and muscles. It has been proposed as a treatment for a number of human ailments including Parkinson's disease, pancreatitis, and pneumonia but has only been found to be effective for lower back pain by virtue of the spinal manipulation used. It has long been regarded as rooted in "pseudoscientific dogma". In 2010, Steven Salzberg referred to the OMT-specific training given by colleges of osteopathic medicine as "training in pseudoscientific practices".
- Radionics – means of medical diagnosis and therapy which proponents believe can diagnose and remedy health problems using various frequencies in a putative energy field coupled to the practitioner's electronic device. The first such "black box" devices were designed and promoted by Albert Abrams, and were definitively proven useless by an independent investigation commissioned by Scientific American in 1924. The internal circuitry of radionics devices is often obfuscated and irrelevant, leading proponents to conjecture dowsing and ESP as operating principles. Similar devices continue to be marketed under various names, though none is approved by the US Food and Drug Administration; there is no scientific evidence for the efficacy or underlying premise of radionics devices. The radionics of Albert Abrams and his intellectual descendants should not be confused with similarly named reputable and legitimate companies, products, or medical treatments such as radiotherapy or radiofrequency ablation.
- Reiki is a form of alternative medicine developed in 1922 by Japanese Buddhist Mikao Usui. Since originating in Japan, Reiki has been adapted into varying cultural traditions across the world. Reiki practitioners use a technique called palm healing or hands-on healing through which a "universal energy" is allegedly transferred through the palms of the practitioner to the patient in order to encourage emotional or physical healing.
- Reflexology, or zone therapy, is an alternative medicine involving the physical act of applying pressure to the feet, hands, or ears with specific thumb, finger, and hand techniques without the use of oil or lotion. It is based on what reflexologists claim to be a system of zones and reflex areas that they say reflect an image of the body on the feet and hands, with the premise that such work effects a physical change to the body. A 2009 systematic review of randomised controlled trials concluded that the best evidence available to date does not demonstrate convincingly that reflexology is an effective treatment for any medical condition. There is no consensus among reflexologists on how reflexology is supposed to work; a unifying theme is the idea that areas on the foot correspond to areas of the body, and that by manipulating these one can improve health through one's qi. Reflexologists divide the body into ten equal vertical zones, five on the right and five on the left. Concerns have been raised by medical professionals that treating potentially serious illnesses with reflexology, which has no proven efficacy, could delay the seeking of appropriate medical treatment.
- Rolfing (also called Structural Integration) – body manipulation devised by Ida Rolf (1896–1979) claimed by practitioners to be capable of ridding the body of traumatic memories storied in the muscles. There is no evidence that rolfing is effective as a treatment for any condition.
- Therapeutic touch – form of vitalism where a practitioner, who may be also a nurse, passes his or her hands over and around a patient to "realign" or "rebalance" a putative energy field. A recent Cochrane Review concluded that "[t]here is no evidence that [Therapeutic Touch] promotes healing of acute wounds."[needs update] No biophysical basis for such an energy field has been found.
- Tin foil hat – A tin foil hat is a hat made from one or more sheets of aluminium foil, or a piece of conventional headgear lined with foil, worn in the belief it shields the brain from threats such as electromagnetic fields, mind control, and mind reading. At this time no link has been established between the radio-frequency EMR that tin foil hats are meant to protect against and subsequent ill health.
- Traditional Chinese medicine (TCM) – traditional medical system originating in China and practiced as an alternative medicine throughout much of the world. It contains elements based in the cosmology of Taoism, and considers the human body more in functional and vitalistic than anatomical terms. Health and illness in TCM follow the principle of yin and yang, and are ascribed to balance or imbalance in the flow of a vital force, qi. Diagnostic methods are solely external, including pulse examination at six points, examination of a patient's tongue, and a patient interview; interpractitioner diagnostic agreement is poor. The TCM description of the function and structure of the human body is fundamentally different from modern medicine, though some of the procedures and remedies have shown promise under scientific investigation.
- TCM materia medica – a collection of crude medicines used in traditional Chinese medicine. These include many plants in part or whole, such as ginseng and wolfberry, as well as more exotic ingredients such as seahorses. Preparations generally include several ingredients in combination, with selection based on physical characteristics such as taste or shape, or relationship to the organs of TCM. Most preparations have not been rigorously evaluated or give no indication of efficacy. Pharmacognosy research for potential active ingredients present in these preparations is active, though the applications do not always correspond to those of TCM.
- Meridians are the channels through which qi flows, connecting the several zang-fu organ pairs. There is no known anatomical or histological basis for the existence of acupuncture points or meridians.
- Qi – vital energy whose flow must be balanced for health. Qi has never been directly observed, and is unrelated to the concept of energy used in science.
- Zang-fu – concept of organs as functional yin and yang entities for the storage and manipulation of qi. These organs are not based in anatomy.
- Urine therapy – drinking either one's own undiluted urine or homeopathic potions of urine for treatment of a wide variety of diseases is based on pseudoscience.
- Promotion of a link between autism and vaccines, in which the vaccines are accused of causing autism-spectrum conditions, triggering them, or aggravating them, has been characterized as pseudoscience. Many epidemiological studies have reported no association between either the MMR vaccine and autism, or thimerosal-containing vaccines and autism. Consequently, the Institute of Medicine has concluded that there is no causal link between either of these varieties of vaccines and autism. Similarly, "Vaccine overload", a non-medical term describing the notion that giving many vaccines at once may overwhelm or weaken a child's immature immune system and lead to adverse effects, is strongly contradicted by scientific evidence.
- Vitalism – doctrine that the processes of life are not explicable by the laws of physics and chemistry alone and that life is in some part self-determining. The book Encyclopedia of Pseudoscience stated "today, vitalism is one of the ideas that form the basis for many pseudoscientific health systems that claim that illnesses are caused by a disturbance or imbalance of the body's vital force." "Vitalists claim to be scientific, but in fact they reject the scientific method with its basic postulates of cause and effect and of provability. They often regard subjective experience to be more valid than objective material reality."
- Wilson's syndrome (not to be confused with Wilson's disease) is an alternative medicine concept, not recognized as a legitimate diagnosis in evidence-based medicine. Its supporters describe Wilson's syndrome as a mix of common and non-specific symptoms which they attribute to low body temperature and impaired conversion of thyroxine (T4) to triiodothyronine (T3), despite normal thyroid function tests. The American Thyroid Association (ATA) says Wilson's syndrome is at odds with established knowledge of thyroid function, has vague diagnostic criteria, and lacks supporting scientific evidence. The ATA further raised concern that the proposed treatments were potentially harmful.
- Wind turbine syndrome and wind farm syndrome are terms for adverse health effects that have been ascribed to the proximity of wind turbines. Proponents have claimed that these effects include death, cancer and congenital abnormality. The distribution of recorded events, however, correlates with media coverage of wind farm syndrome itself, and not with the presence or absence of wind farms. Reviews of the scientific literature have consistently found no reason to believe that wind turbines are harmful to health.
- Attachment therapy – common name for a set of potentially fatal clinical interventions and parenting techniques aimed at controlling aggressive, disobedient, or unaffectionate children using "restraint and physical and psychological abuse to seek their desired results." (The term "attachment therapy" may sometimes be used loosely to refer to mainstream approaches based on attachment theory, usually outside the USA where the pseudoscientific form of attachment therapy is less known.) Probably the most common form is holding therapy in which the child is restrained by adults for the purpose of supposed cathartic release of suppressed rage and regression. Perhaps the most extreme, but much less common, is "rebirthing", in which the child is wrapped tightly in a blanket and then made to simulate emergence from a birth canal. This is done by encouraging the child to struggle and pushing and squeezing him/her to mimic contractions. Despite the practice's name it is not based on traditional attachment theory and shares no principles of mainstream developmental psychology research. In 2006, it was the subject of an almost entirely critical Taskforce Report commissioned by the American Professional Society on the Abuse of Children (APSAC). Not all forms of attachment therapy are coercive and since the Candace Newmaker case there has been a move towards less coercive practices by leaders in the field.
- Brainwashing or mind control – a theoretical indoctrination process which results in "an impairment of autonomy, an inability to think independently, and a disruption of beliefs and affiliations. In this context, brainwashing refers to the involuntary reeducation of basic beliefs and values". The term has been applied to any tactic, psychological or otherwise, which can be seen as subverting an individual's sense of control over their own thinking, behavior, emotions or decision making. In 1983, the American Psychological Association (APA) asked Margaret Singer to chair a taskforce called the APA Task Force on Deceptive and Indirect Methods of Persuasion and Control (DIMPAC) to investigate whether brainwashing or "coercive persuasion" did indeed play a role in "cult" recruitment. The APA found that brainwashing theories were without empirical proof, and rejected the DIMPAC report because the report "lacks the scientific rigor and evenhanded critical approach necessary for APA imprimatur". Two critical letters from external reviewers Benjamin Beit-Hallahmi and Jeffery D. Fisher accompanied the APA's rejection memo. The letters criticized "brainwashing" as an unrecognized theoretical concept and Singer's reasoning as so flawed that it was "almost ridiculous."
- Conversion therapy – sometimes called reparative therapy, seeks to change a non-heterosexual person's sexual orientation so they will no longer be homosexual or bisexual. The American Psychiatric Association defines reparative therapy as "psychiatric treatment ... which is based upon the assumption that homosexuality per se is a mental disorder or based upon the a priori assumption that a patient should change their sexual homosexual orientation."
- Graphology – psychological test based on a belief that personality traits unconsciously and consistently influence handwriting morphology—that certain types of people exhibit certain quirks of the pen. Analysis of handwriting attributes provides no better than chance correspondence with personality, and neuroscientist Barry Beyerstein likened the assigned correlations to sympathetic magic. Graphology is only superficially related to forensic document examination, which also examines handwriting.
- Hypnosis – state of extreme relaxation and inner focus in which a person is unusually responsive to suggestions made by the hypnotist. The modern practice has its roots in the idea of animal magnetism, or mesmerism, originated by Franz Mesmer. Mesmer's explanations were thoroughly discredited, and to this day there is no agreement amongst researchers whether hypnosis is a real phenomenon, or merely a form of participatory role-enactment. Some aspects of suggestion have been clinically useful. Other claimed uses of hypnosis more clearly fall within the area of pseudoscience. Such areas include the use of hypnotic regression, including past life regression.
- Hypnotherapy – therapy that is undertaken with a subject in hypnosis. It is widely considered a branch of alternative medicine though its founder, James Braid, has been described as "one of the most ardent and influential critics of pseudo-science."
- It should be noted that using hypnosis for relaxation, mood control, and other related benefits (often related to meditation) is regarded as part of standard medical treatment rather than alternative medicine, particularly for patients subjected to difficult physical emotional stress in chemotherapy.
- Law of attraction – the maxim that "like attracts like" which in New Thought philosophy is used to sum up the idea that by focusing on positive or negative thoughts a person brings positive or negative experiences into their life. Skeptical Inquirer magazine criticized the lack of falsifiability and testability of these claims. Critics have asserted that the evidence provided is usually anecdotal and that, because of the self-selecting nature of the positive reports, as well as the subjective nature of any results, these reports are susceptible to confirmation bias and selection bias. Physicist Ali Alousi, for instance, criticized it as unmeasurable and questioned the likelihood that thoughts can affect anything outside the head.
- Memetics – approach to evolutionary models of cultural information transfer based on the concept that units of information, or "memes", have an independent existence, are self-replicating, and are subject to selective evolution through environmental forces. Starting from a proposition put forward in the writings of Richard Dawkins, it has since turned into a new area of study, one that looks at the self-replicating units of culture. It has been proposed that just as memes are analogous to genes, memetics is analogous to genetics. Memetics has been deemed a pseudoscience on several fronts. Its proponents' assertions have been labeled "untested, unsupported or incorrect" though the same book contains Susan Blackmore's counter article "Memes as Good Science". Supporters of memetics include EO Wilson, Douglas Hofstadter and many others.
- Myers–Briggs Type Indicator – a personality test composed of four categories of two types. The test has consistent problems with repeatability, in addition to problems of whether or not it has exhaustive and mutually exclusive classifications. The four categories are Introversion/Extroversion, Sensing/Intuition, Thinking/Feeling, Judging/Perception. Each person is said to have one quality from each category, producing 16 unique types. The Center for Applications of Psychological Type claims that the MBTI is scientifically supported, but most of the research on it is done through its own journal, Journal of Psychological Type, raising questions of bias. Results are said to follow the Barnum effect.
- Neuro-linguistic programming – an approach to communication, personal development, and psychotherapy created in the 1970s. The title refers to a stated connection between the neurological processes ("neuro"), language ("linguistic") and behavioral patterns that have been learned through experience ("programming") and can be organized to achieve specific goals in life. According to certain neuroscientists psychologists and linguists, NLP is unsupported by current scientific evidence, and uses incorrect and misleading terms and concepts. Reviews of empirical research on NLP indicate that NLP contains numerous factual errors, and has failed to produce reliable results for the claims for effectiveness made by NLP's originators and proponents. According to Devilly, NLP is no longer as prevalent as it was in the 1970s and 1980s. Criticisms go beyond the lack of empirical evidence for effectiveness; critics say that NLP exhibits pseudoscientific characteristics, title, concepts and terminology. NLP is used as an example of pseudoscience for facilitating the teaching of scientific literacy at the professional and university level. NLP also appears on peer reviewed expert-consensus based lists of discredited interventions. In research designed to identify the "quack factor" in modern mental health practice, Norcross et al. (2006) list NLP as possibly or probably discredited, and in papers reviewing discredited interventions for substance and alcohol abuse, Norcross et al. (2008) list NLP in the "top ten" most discredited, and Glasner-Edwards and Rawson (2010) list NLP as "certainly discredited".
- Parapsychology – controversial discipline that seeks to investigate the existence and causes of psychic abilities and life after death using the scientific method. Parapsychological experiments have included the use of random number generators to test for evidence of precognition and psychokinesis with both human and animal subjects and Ganzfeld experiments to test for extrasensory perception.
- Phrenology – now defunct system for determining personality traits by feeling bumps on the skull proposed by 18th-century physiologist Franz Joseph Gall. In an early recorded use of the term "pseudo-science", François Magendie referred to phrenology as "a pseudo-science of the present day". The assumption that personality can be read from bumps in the skull has since been thoroughly discredited. However, Gall's assumption that character, thoughts, and emotions are located in the brain is considered an important historical advance toward neuropsychology (see also localization of brain function, Brodmann's areas, neuro-imaging, modularity of mind or faculty psychology).
- Polygraphy ("lie detectors") – an interrogation method which measures and records several physiological indices such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions. The belief is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers. Many members of the scientific community consider polygraphy to be pseudoscience. Polygraphy has little credibility among scientists. Despite claims of 90–95% validity by polygraph advocates, and 95–100% by businesses providing polygraph services, critics maintain that rather than a "test", the method amounts to an inherently unstandardizable interrogation technique whose accuracy cannot be established. A 1997 survey of 421 psychologists estimated the test's average accuracy at about 61%, a little better than chance. Critics also argue that even given high estimates of the polygraph's accuracy a significant number of subjects (e.g., 10% given a 90% accuracy) will appear to be lying, and would unfairly suffer the consequences of "failing" the polygraph.
- Primal therapy – sometimes presented as a science. The Gale Encyclopedia of Psychology (2001) states that: "The theoretical basis for the therapy is the supposition that prenatal experiences and birth trauma form people's primary impressions of life and that they subsequently influence the direction our lives take ... Truth be known, primal therapy cannot be defended on scientifically established principles. This is not surprising considering its questionable theoretical rationale." Other sources have also questioned the scientific validity of primal therapy, some using the term "pseudoscience" (see Primal therapy § Criticism).
- Psychoanalysis – body of ideas developed by Austrian physician Sigmund Freud and his followers, which is devoted to the study of human psychological functioning and behavior. Although psychoanalysis is a strong influence within psychiatry,[a][b] it has been controversial ever since its inception. It is considered pseudoscience by some. Karl Popper characterized it as pseudoscience based on psychoanalysis failing the requirement for falsifiability. Frank Cioffi argued that "though Popper is correct to say that psychoanalysis is pseudoscientific and correct to say that it is unfalsifiable, he is mistaken to suggest that it is pseudoscientific because it is unfalsifiable. [...] It is when [Freud] insists that he has confirmed (not just instantiated) [his empirical theses] that he is being pseudoscientific."
- Sluggish schizophrenia – a diagnosis used in some Communist nations to justify the involuntary commitment of political dissidents to mental institutions.
- Subliminal advertising – visual or auditory information discerned below the threshold of conscious awareness, which is claimed to have a powerful enduring effect on consuming habits. It went into disrepute in the late 1970s, but there has been renewed research interest recently. The mainstream of accepted scientific opinion does not hold that subliminal perception has a powerful, enduring effect on human behaviour.
- Scientific racism – claim that scientific evidence shows the inferiority or superiority of certain races.
- Aryanism – the claim that there is a distinct "Aryan race" which is superior to other putative races, was an important tenet of Nazism, and "the basis of the German government policy of exterminating Jews, Gypsies, and other 'non-Aryans.'"
- Drapetomania – a supposed mental illness described by American physician Samuel A. Cartwright in 1851 that caused black slaves to flee captivity.
- Melanin theory – belief founded in the distortion of known physical properties of melanin, a natural polymer, that posits the inherent superiority of dark-skinned people and the essential inhumanity and inferiority of light-skinned people.
- Turkish History Thesis – the belief that Turks from Central Asia migrated and brought civilization to China, India, the Middle East, and Europe.
- Sun Language Theory – the belief that all languages had its origin in the Turkish language.
- Unilineal evolution – Before Darwin's work On the Origin of Species, some models incorporated Enlightenment ideas of social progress, and thus, according to philosopher of science Michael Ruse, were pseudoscientific by current standards, and may have been viewed as such during the 18th century, as well as into the start of the 19th century (though the word pseudoscience may not have been used in reference to these early proposals). This pseudoscientific, and often political, incorporation of social progress with evolutionary thought continued for some one hundred years following the publication of Origin of Species.
Paranormal and ufology
- Animal mutilations – cases of animals, primarily domestic livestock, with seemingly inexplicable wounds. These wounds have been said to be caused by extraterrestrials, cults, covert government organizations, or cryptids such as el chupacabra, when in fact most such cases were found to be caused by natural predation.
- Channeling – communication of information to or through a person allegedly from a spirit or other paranormal entity.
- Crop circles – geometric designs of crushed or knocked-over crops created in a field. Aside from skilled farmers or pranksters working through the night, explanations for their formation include UFOs and anomalous, tornado-like air currents. The study of crop circles has become known as "cerealogy".
- Cryptozoology – search for creatures that are considered not to exist by most biologists. Well known examples of creatures of interest to cryptozoologists include Bigfoot, Yeren, Yeti, and the Loch Ness Monster. According to leading skeptical authors Michael Shermer and Pat Linse, "Cryptozoology ranges from pseudoscientific to useful and interesting, depending on how it is practiced."
- Dowsing refers to practices said to enable one to detect hidden water, metals, gemstones or other objects.
- Electronic voice phenomenon – purported communication by spirits through tape recorders and other electronic devices.
- Extra-sensory perception – paranormal ability (independent of the five main senses or deduction from previous experience) to acquire information by means such as telepathy, clairvoyance, precognition, psychic abilities, and remote viewing.
- Levitation – act of rising up from the ground without any physical aids, usually by the power of thought.
- Palmistry – the belief that the future can be foretold through palm reading. Predictions are based on the shape, line, and mounts of the hands. Palmists use cold reading in order to appear psychic.
- Parapsychology – (see Psychology section above.)
- Pseudoarchaeology – investigation of the ancient past using alleged paranormal or other means which have not been validated by mainstream science.
- Psychic surgery – type of medical fraud, popular in Brazil and the Philippines. Practitioners use sleight of hand to make it appear as though they are reaching into a patient's body and extracting "tumours". Psychic surgery is usually explicit deception; i.e., the "practitioners" are aware that they are practicing fraud or "quackery".
- Psychokinesis – paranormal ability of the mind to influence matter or energy at a distance.
- Rumpology – neologism referring to a pseudoscience akin to physiognomy, performed by examining crevices, dimples, warts, moles and folds of a person's buttocks in much the same way a chirologist would read the palm of the hand.
- Séances – ritualized attempts to communicate with the dead.
- The Tunguska event was an actual large explosion, possibly caused by a meteoroid or comet, in what is now Krasnoyarsk Krai, Russia in June 1908. Night skies as far away as London were markedly brighter for several evenings. Unsupported theories regarding the event include the impact of a miniature black hole or large body of antimatter, ball lightning, a test by Nikola Tesla of the apparatus at Wardenclyffe Tower, and a UFO crash. Another theory is that the explosion was caused by a piece of Biela's Comet from 1883.
- Ufology – the study of unidentified flying objects (UFOs) that sometimes includes the belief that UFOs are evidence of extraterrestrial visitors.
- Fomenko's chronology – argues that the conventional chronology is fundamentally flawed, that events attributed to antiquity such as the histories of Rome, Greece and Egypt actually occurred during the Middle Ages.
- Holocaust denial – The Leuchter report attempted to demonstrate on a forensic level that mass homicidal gassings at Nazi extermination camps did not take place.
- Phantom time hypothesis – proposes a conspiracy by the Holy Roman Emperor Otto III, Pope Sylvester II, and possibly the Byzantine Emperor Constantine VII, to fabricate the Anno Domini dating system retrospectively, so that it placed them at the special year of AD 1000, and to rewrite history to legitimize Otto's claim to the Holy Roman Empire, thereby adding 297 years of "phantom time" to the Middle Ages.
- Numerology (including the numerology practices of Kabbalah) – a set of beliefs in a divine, mystical, or other special relationship between a number and coinciding events. Numerology is regarded as pseudomathematics or pseudoscience by modern scientists. It is often associated with the paranormal, alongside astrology and similar divinatory arts.
- Scriptural codes – the belief that a book or fragment of holy scripture contains encoded messages that impart esoteric knowledge. One such decoding method involves identifying "equidistant letter sequences" that spell out such messages.
Religious and spiritual beliefs
Spiritual and religious practices and beliefs, according to astronomer Carl Sagan, are normally not classified as pseudoscience. However, religion can sometimes nurture pseudoscience, and "at the extremes it is difficult to distinguish pseudoscience from rigid, doctrinaire religion", and some religions might be confused with pseudoscience, such as traditional meditation. The following religious/spiritual items have been related to or classified as pseudoscience in some way:
- Koranic scientific foreknowledge (Islam) – Koranic Science (or Qur'anic science or Hadeeth science) asserts that foundational Islamic religious texts made accurate statements about the world that science verified hundreds of years later. This belief is a common theme in Bucailleism.
- Christian Science is generally considered a Christian new religious movement. However, some have called it "pseudoscience" because its founder, Mary Baker Eddy, used "science" in its name, and because of its former stance against medical science. Also, "Eddy used the term Metaphysical science to distinguish her system both from materialistic science and from occult science." The church now accepts the use of medical science. Vaccinations were banned, but in 1901, Eddy, at the age of 80, advised her followers to submit to them.
Creation science or scientific creationism is a branch of creationism that claims to provide scientific support for the Genesis creation narrative in the Book of Genesis and disprove or reexplain the scientific facts, theories and scientific paradigms about geology, cosmology, biological evolution, archeology, history and linguistics.[not in citation given]
- Creationist cosmologies – cosmologies which, among other things, allow for a universe that is only thousands of years old.
- Baraminology – taxonomic system that classifies animals into groups called "created kinds" or "baramins" according to the account of creation in the book of Genesis and other parts of the Bible.
- Creation biology – subset of creation science that tries to explain biology without macroevolution.
- Flood geology – creationist form of geology that advocates most of the geologic features on Earth are explainable by a global flood.
- Searches for Noah's Ark – attempts to find the burial site of Noah's Ark, that according to the Genesis flood narrative is located somewhere in the alleged "Mountains of Ararat". There have been numerous expeditions with several false claims of success; the practice is widely regarded as pseudoscience, more specifically pseudoarchaeology.
- Intelligent design – maintains that "certain features of the universe and of living things are best explained by an intelligent cause, not an undirected process such as natural selection." These features include:
- Irreducible complexity – claim that some biological systems are too complex to have evolved from simpler systems. It is used by proponents of intelligent design to argue that evolution by natural selection alone is incomplete or flawed, and that some additional mechanism (an "Intelligent Designer") is required to explain the origins of life.
- Specified complexity – claim that when something is simultaneously complex and specified, one can infer that it was produced by an intelligent cause (i.e., that it was designed) rather than being the result of natural processes.
- Dianetics, a therapeutic technique promoted by Scientology, purports to treat a hypothetical reactive mind. There is no scientific evidence for the existence of an actual reactive mind, apart from the stimulus response mechanisms documented in behaviorist psychology.
- Scientology's Purification Rundown and Narconon programs purport to clean the human body of toxins and drugs respectively. Their methodology consists of very long saunas over many days, extremely large (possibly toxic) doses of vitamins including niacin, and Scientology 'training routines', sometimes including attempts at telekenesis. The programmes have been described as "medically unsafe", "quackery" and "medical fraud", while academic and medical experts have dismissed Narconon's educational programme as containing "factual errors in basic concepts such as physical and mental effects, addiction and even spelling". In turn, Narconon has claimed that mainstream medicine is "biased" against it, and that "people who endorse so-called controlled drug use cannot be trusted to review a program advocating totally drug-free living." Narconon has said that criticism of its programmes is "bigoted", and that its critics are "in favor of drug abuse [...] they are either using drugs or selling drugs".
- Quantum mysticism – builds on a superficial similarity between certain New Age concepts and such seemingly counter-intuitive quantum mechanical concepts as the uncertainty principle, entanglement, and wave–particle duality, while generally ignoring the limitations imposed by quantum decoherence. One of the most abused ideas is Bell's theorem, which proves the nonexistence of local hidden variables in quantum mechanics. Despite this, Bell himself rejected mystical interpretations of the theory.
- Cosmetics and cleaning products frequently make pseudoscientific claims about their products. Claims are made about both the benefits or toxicity of certain products or ingredients. Practices include angel dusting, the addition of minuscule amounts of active ingredients to products which are insufficient to cause any measurable benefit. Examples of products include:
- Laundry balls – spherical or toroidal objects marketed as soap substitutes for washing machines.
The following concepts have only a very small number of proponents, yet have become notable:
- Lawsonomy – proposed philosophy and system of claims about physics made by baseball player and aviator Alfred William Lawson.
- Morphic resonance – The idea put forth by Rupert Sheldrake that "natural systems, such as termite colonies, or pigeons, or orchid plants, or insulin molecules, inherit a collective memory from all previous things of their kind". It is also claimed to be responsible for "mysterious telepathy-type interconnections between organisms".
- N rays – A hypothesized form of radiation described by Prosper-René Blondlot in 1903, which briefly inspired significant scientific interest but were subsequently found to have been a result of confirmation bias.
- Penta Water – claimed acoustically induced structural reorganization of liquid water into long-lived small clusters of five molecules each. Neither these clusters nor their asserted benefits to humans have been shown to exist.
- Polywater – hypothetical polymerized form of water proposed in the 1960s with a higher boiling point, lower freezing point, and much higher viscosity than ordinary water. It was later found not to exist, with the anomalous measurements being explained by biological contamination. Chains of molecules of varying length (depending on temperature) tend to form in normal liquid water without changing the freezing or boiling point.
- Time Cube – a website created by Gene Ray, in 1997, where he sets out his personal model of reality, which he calls Time Cube. He suggests that all of modern physics is wrong, and his Time Cube model proposes that each day is really four separate days occurring simultaneously.
- Timewave zero – numerological formula that was invented by psychonaut Terence McKenna with the help of the hallucinogenic drug dimethyltryptamine. After experiencing 2012 doomsday predictions, he redesigned his formula to have a "zero-point" at the same date as the Mayan longcount calendar.
- Torsion field – hypothetical physical field responsible for ESP, homeopathy, levitation, and other paranormal phenomena.
- Welteislehre – notion by the Austrian Hanns Hörbiger that ice was the basic substance of all cosmic processes.
- Blood types in Japanese culture
- Cargo cult science
- Church of the SubGenius
- Crank (person)
- Fan death
- Fringe science
- Fringe science organizations
- List of books about skepticism
- List of cognitive biases
- List of common misconceptions
- List of conspiracy theories
- List of cryptids
- List of memory biases
- List of protosciences
- List of diagnoses characterized as pseudoscience
- Observational error
- Occam's razor
- Paradigm shift
- Pathological science
- Philosophy of science
- Kaplan and Sadock's Synopsis of Psychiatry, 2007: "Psychoanalysis has existed before the turn of the 20th century and, in that span of years, has established itself as one of the fundamental disciplines within psychiatry. The science of psychoanalysis is the bedrock of psychodynamic understanding and forms the fundamental theoretical frame of reference for a variety of forms of therapeutic intervention, embracing not only psychoanalysis itself but also various forms of psychoanalytically oriented psychotherapy and related forms of therapy using psychodynamic concepts." 
- Robert Michels, 2009: "Psychoanalysis continues to be an important paradigm organizing the way many psychiatrists think about patients and treatment. However, its limitations are more widely recognized and it is assumed that many important advances in the future will come from other areas, particularly biologic psychiatry. As yet unresolved is the appropriate role of psychoanalytic thinking in organizing the treatment of patients and the training of psychiatrists after that biologic revolution has born fruit. Will treatments aimed at biologic defects or abnormalities become technical steps in a program organized in a psychoanalytic framework? Will psychoanalysis serve to explain and guide supportive intervention for individuals whose lives are deformed by biologic defect and therapeutic interventions, much as it now does for patients with chronic physical illness, with the psychoanalyst on the psychiatric dialysis program? Or will we look back on the role of psychoanalysis in the treatment of the seriously mentally ill as the last and most scientifically enlightened phase of the humanistic tradition in psychiatry, a tradition that became extinct when advances in biology allowed us to cure those we had so long only comforted?"
- Pollak, Melissa (13 January 2000). "Chapter 8: Science and Technology: Public Attitudes and Public Understanding". In Bradburn, Norman M.; Lehming, Rolf; Carlson, Lynda; Frase, Mary J.; et al. Science and Engineering Indicators. Arlington, VA: National Science Foundation. Archived from the original on 4 February 2012.
- Stuart, David (2011). The Order of Days: The Maya World and the Truth about 2012. Harmony Books.
- 2012: Beginning of the End or Why the World Won't End?
- Harrold; "Noah's Ark and Ancient Astronauts: Pseudoscientific Beliefs About the Past Among a Sample of College Students;" The Skeptical Inquirer; vol 11.1; 1986: 61; Committee for the Scientific Investigation of Claims of the Paranormal; 13 Dec 2010.
- Zarka, Philippe (2011). "Astronomy and astrology". Proceedings of the International Astronomical Union. 5 (S260): 420–425. doi:10.1017/S1743921311002602. ISSN 1743-9213.
- Dukes, Edwin Joshua (1971). The Encyclopædia of Religion and Ethics. Edinburgh: T & T Clark. p. 834.
- Vierra, Monty (March 1997). "Harried by "Hellions" in Taiwan" (newsletter). Sceptical Briefs.
- Kirkpatrick; Dahlquist (2006). Technical Analysis: The Complete Resource for Financial Market Technicians. Financial Times Press. p. 3. ISBN 978-0-13-153113-0.
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they simply interpret the way we form these various features on the page in much the same way ancient oracles interpreted the entrails of oxen or smoke in the air. I.e., it's a kind of magical divination or fortune telling where 'like begets like.'
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On the other hand, in properly controlled, blind studies, where the handwriting samples contain no content that could provide non-graphological information upon which to base a prediction (e.g., a piece copied from a magazine), graphologists do no better than chance at predicting the personality traits
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In summary, then, it seems that graphology as currently practiced is a typical pseudoscience and has no place in character assessment or employment practice. There is no good scientific evidence to justify its use, and the graphologists do not seem about to come up with any.
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Few tragedies can be more extensive than the stunting of life, few injustices deeper than the denial of an opportunity to strive or even to hope, by a limit imposed from without, but falsely identified as lying within.
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There have been abundant illustrations of pseudoscientific theories-monocausal theories of human behavior that were hailed as "scientific"-that have been applied with disastrous results. Examples: [...] Many racists today point to IQ to justify a menial role for blacks in society and their opposition to affirmative action.
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For the first one hundred and fifty years evolution was – and was seen to be – a pseudoscience.
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Ruse's somewhat surprising yet intriguing claim is that "before Charles Darwin, evolution was an epiphenomenon of the ideology of [social] progress, a pseudoscience and seen as such..."
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Belief in pseudoscience is relatively widespread... At least half of the public believes in the existence of extrasensory perception (ESP).
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Belief in pseudoscience is relatively widespread... A sizable minority of the public believes in UFOs and that aliens have landed on Earth.
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The theory of intelligent design holds that certain features of the universe and of living things are best explained by an intelligent cause, not an undirected process such as natural selection.
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In making this determination, we have addressed the seminal question of whether ID is science. We have concluded that it is not, and moreover that ID cannot uncouple itself from its creationist, and thus religious, antecedents..
- "We therefore find that Professor Behe's claim for irreducible complexity has been refuted in peer-reviewed research papers and has been rejected by the scientific community at large." [[s:Kitzmiller v. Dover Area School District/4:Whether ID Is Science#Page 79 of 139 |Ruling, Judge John E. Jones III, Kitzmiller v. Dover Area School District]]
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True in this latest creationist variant, advocates of so-called intelligent design [...] use more slick, pseudoscientific language. They talk about things like 'irreducible complexity' [...] For most members of the mainstream scientific community, ID is not a scientific theory, but a creationist pseudoscience.
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The Discovery Institute and ID proponents have a number of goals that they hope to achieve using disingenuous and mendacious methods of marketing, publicity, and political persuasion. They do not practice real science because that takes too long, but mainly because this method requires that one have actual evidence and logical reasons for one's conclusions, and the ID proponents just don't have those. If they had such resources, they would use them, and not the disreputable methods they actually use.
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When Narconon opened its Chilocco facility in 1991, the Oklahoma Board of Mental Health issued a blistering assessment in denying its application for certification. "There is no credible evidence establishing the effectiveness of the Narconon program to its patients," the board concluded. It attacked the program as medically unsafe; dismissed the sauna program as unproven; and criticized Narconon for inappropriately taking some patients off prescribed psychiatric medication.
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A fourth article did not mention Hubbard by name, but reported favorably on Narconon, his drug and alcohol rehabilitation program, which is run by Scientologists.
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Those who want a tan from his celebrity glow will urge a fair hearing for his quackery. Obscure City Councilman Hiram Monserrate suddenly finds himself talked about after issuing a proclamation of huzzahs for L. Ron Hubbard. Three: The Ground Zero maladies are so baffling that workers will try anything. Anyone who feels better will credit any placebo at hand – whether Cruise or the Easter Bunny. In 1991, Time called Scientology's anti-drug program "Narconon" a "vehicle for drawing addicts into the cult" – which the magazine said "invented hundreds of goods and services for which members are urged to give up 'donations' " – such as $1,250 for advice on "moving swiftly up the Bridge" of enlightenment. That's New Age techno-gobbledygook for advice on buying swiftly up the Bridge of Brooklyn. Scientology fronts such as the New York Rescue Workers Detoxification Project – its Web site immediately recognizable as the work of Hubbardites by its logo, which looks like the cover of a Robert Heinlein paperback from 1971 – hint that their gimmicks might possibly interest anyone dreaming of weight loss, higher I.Q. or freedom from addiction. And you might be extra-specially interested if you've faced heart disease, cancer, Agent Orange or Chernobyl. As Mayor Bloomberg put it, Scientology "is not science." Nope. It's science fiction.
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About 30 Scientologists were arrested – and 19 of them later indicted – between May and October 1990 on charges of fraud, conspiracy to defraud and the illegal practice of medicine following the 1988 suicide of a church member in Lyon, eastern France. [...] The sect has often found itself in trouble with officialdom the world over, accused of defrauding and brainwashing followers and, in France, of quackery at its illegal anti-drug clinics called "Narconon."
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Narconon, a subsidiary of Scientology, and the association "Yes to Life, No to Drugs" have also made a specialty of the fight against drugs and treating drug addicts. [...] Drug addicts are just one of the Scientologists' targets for recruitment. The offer of care and healing through techniques derived from dianetics is only a come-on. The detoxification of the patient by means of "dianetics purification" is more a matter of manipulation, through the general weakening that it causes; it is a way of brainwashing the subject. Frequently convicted for illegal practice of medicine, violence, fraud and slander, the Scientologists have more and more trouble getting people to accept their techniques as effective health measures, as they like to claim. They recommend their purification processes to eliminate X-rays and nuclear radiation, and to treat goiter and warts, hypertension and psoriasis, hemorrhoids and myopia... why would anyone find that hard to swallow? Scientology has built a library of several hundreds of volumes of writings exalting the effects of purification, and its disciples spew propaganda based on irresponsible medical writings by doctors who are more interested in the support provided by Scientology than in their patients' well-being. On the other hand, responsible scientific reviews have long since "eliminated" dianetics and purification from the lists of therapies – relegating them to the great bazaar of medical fraud. [...] Medical charlatans do not base their claims on scientific proof but, quite to the contrary, on peremptory assertions – the kind of assertions that they challenge when they come out of the mouths of those who defend "real" medicine.
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The program, Narconon Drug Prevention & Education, "often exemplifies the outdated, non-evidence-based and sometimes factually inaccurate approach, which has not served students well for decades," concluded Steve Heilig, director of health and education for the San Francisco Medical Society. In his letter to Trish Bascom, director of health programs for the San Francisco Unified School District, Heilig said five independent experts in the field of drug abuse had helped him evaluate Narconon's curriculum. [...] "One of our reviewers opined that 'this (curriculum) reads like a high school science paper pieced together from the Internet, and not very well at that,' " Heilig wrote Bascom. "Another wrote that 'my comments will be brief, as this proposal hardly merits detailed analysis.' Another stated, 'As a parent, I would not want my child to participate in this kind of 'education.' " Heilig's team evaluated Narconon against a recent study by Rodney Skager, a professor emeritus at UCLA's Graduate School of Education and Information Studies, describing what good anti-drug programs should offer students. "We concurred that [...] the Narconon materials focus on some topics of lesser importance to the exclusion of best knowledge and practices," Heilig wrote, and that the curriculum contained "factual errors in basic concepts such as physical and mental effects, addiction and even spelling."
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The California Medical Association has declared unanimous support for school districts that have dropped Narconon and other "factually inaccurate approaches" to antidrug instruction from their classrooms, and will urge the American Medical Association to do the same. Nearly 500 California doctors also endorsed "scientifically based drug education in California schools"
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