August 12, 2006
Q: What is hypnosis? - Layperson
A: Hypnosis is a psychological condition in which some people may be induced to show various differences in behavior and thinking. Although some individuals experience an increase in suggestibility and subjective feelings of an 'altered state of consciousness', this is not true for everyone. In fact, some supposed hypnotic indicators and subjective changes can be achieved without relaxation or a lengthy induction, a fact that increases the controversy around hypnosis.
Intense debate surrounds the topic of hypnosis. Some scientists have disputed its very existence, while many therapists insist upon its value. One potential source of controversy is the wide variety of theories of hypnosis that traditionally have been split into 'state' and 'non-state' camps. This controversy may be decreasing as modern brain-imaging techniques offer hope for an increased understanding of the nature of hypnosis and the value of both perspectives is increasingly recognized.
The applications of hypnosis vary widely. Two distinct applications of hypnosis are its use in entertainment and health applications. The popular perception of the hypnotic experience is that of the entertainment version. The stage hypnotist uses a variety of methods to relax and focus the subjects, eventually making it appear to the audience that the subject is asleep or, popularly termed, in a trance. During the performance, the subjects seem to obey the commands of the hypnotist to engage in behaviors they might not normally choose to perform.
On the other hand, hypnosis applications in the medical and health fields are often experienced very differently. Evidence supports the clinical use of hypnosis for pain control, for weight control, in the treatment of irritable-bowel syndrome, and as an adjunct to cognitive behavioral and other therapies. Hypnosis, itself, is not a therapy, but is effectively used as an adjunct to other therapies; hence, "hypnotherapy" is less preferable than the use of hypnosis-related techniques as part of an integrated psychological package.
It is often said that there are as many definitions of hypnosis as there are hypnotists. Researchers and clinicians have different requirements for explanations of hypnosis, so that the focus of theories from these respective fields can vary greatly.
One fundamental distinction in hypnosis theory is between 'state' and 'non-state' approaches to hypnosis. State theorists believe that hypnosis is an altered state of consciousness, whereas non-state theorists believe that hypnotic effects are the product of more-mundane psychological processes such as absorption and expectancy. The APA definition (below), essentially a consensus statement from a broad range of researchers and clinicians, remains neutral in this argument.
American Psychological Association
Hypnosis typically involves an introduction to the procedure during which the subject is told that suggestions for imaginative experiences will be presented. The hypnotic induction is an extended initial suggestion for using one's imagination, and may contain further elaborations of the introduction. A hypnotic procedure is used to encourage and evaluate responses to suggestions. When using hypnosis, one person (the subject) is guided by another (the hypnotist) to respond to suggestions for changes in subjective experience, alterations in perception, sensation, emotion, thought or behavior. Persons can also learn self-hypnosis, which is the act of administering hypnotic procedures on one's own. If the subject responds to hypnotic suggestions, it is generally inferred that hypnosis has been induced. Many believe that hypnotic responses and experiences are characteristic of a hypnotic state. While some think that it is not necessary to use the word "hypnosis" as part of the hypnotic induction, others view it as essential.
Details of hypnotic procedures and suggestions will differ depending on the goals of the practitioner and the purposes of the clinical or research endeavor. Procedures traditionally involve suggestions to relax, though relaxation is not necessary for hypnosis and a wide variety of suggestions can be used including those to become more alert. Suggestions that permit the extent of hypnosis to be assessed by comparing responses to standardized scales can be used in both clinical and research settings. While the majority of individuals are responsive to at least some suggestions, scores on standardized scales range from high to negligible. Traditionally, scores are grouped into low, medium, and high categories. As is the case with other positively scaled measures of psychological constructs such as attention and awareness, the salience of evidence for having achieved hypnosis increases with the individual's score
Harry Cannon FNRAH defines hypnosis: "a psychological mechanism by which a suggestion moves directly to and is accepted by the subconscious mind." For this (hypnosis) to take place you require four things:
1. A focus of attention 2. A heightened emotion 3. The suggestion itself 4. No critique of the suggestion by the conscious intellect.
When these four requirements are met, suggestion takes root in the subconscious and so has action out in motor function. This simply means that the suggestion is acted upon by the mind.
At: Harry postulates that all our learning is via the modality of hypnosis. He gives the following example: “Imagine a small child being caught by their mother taking something that does not belong to them from another child. Imagine then the mother chastising her child for this action (the child now has a focus of attention and a heightened emotion). She then instructs her child to stop it and not do it again (the given suggestion). This suggestion, laid down during the child’s formative years has, by the criteria above, moved to the subconscious mind without any intellectual argument from the child. Because of this experience, a new social boundary has now been placed upon the child who, in later life will definitely ‘feel’ those same feelings and emotions whenever it finds itself in a similar situation”.
So hypnosis is all around us and is happening all the time. The level and apparent intensity of the ‘hypnotic state’ is nothing more than the witnessing of an individuals subjective experience of it, and nothing more.
Michael Yapko defines hypnosis: "...hypnosis is a process of influential communication in which the clinician elicits and guides the inner associations of the client in order to establish or strengthen therapeutic associations in the context of a collaborative and mutually responsive goal-oriented relationship.
Dave Elman defines hypnosis as "a state of mind in which the critical faculty of the human mind is bypassed, and selective thinking established." The critical faculty of your mind is that part which passes judgment. It distinguishes between concepts of hot and cold, sweet and sour, large and small, dark and light. If we can bypass this critical faculty in such a way that you no longer distinguish between hot and cold, sweet and sour, we can substitute selective thinking for conventional judgment making.
Joe Griffin defines hypnosis, based upon his dream research, as "any artificial means of accessing the REM state". All hypnotic phenomena including amnesia, anaesthesia, analgesia, arm levitation, body illusions, ideomotor responses, catalepsy, age regression, post hypnotic responses, time distortion, dissociation, and hallucination are properties of the REM state which he identifies as the natural programming state of the brain.
Co-founder of Neuro-Linguistic-Programming, Richard Bandler is the worlds best and renowned hypnotist after training with Milton Erikkson (of which their was notable dislike between them). Richard Bandler is most famed for his work at removing phobias within 2 minutes and the handshake interupt, a trance induction which uses the subconscious process of a handshake to induce a deep trance and proclaims to have never found a single person to be unhypnotisable.
Alpha- and Theta-state theories
Through data collected by Electroencephalography (EEGs), four major brain-wave patterns—frequency of electrical impulses firing from the brain—have been identified. The Beta state (alert/working) is defined as 14–32 cycles per second (CPS), the Alpha state (relaxed/reflecting) as the 7–14 CPS, the Theta state (drowsy) as 4–7 CPS, and the Delta state (sleeping/dreaming/deep sleep) as approximately 3–5 CPS.
One physiological definition of hypnosis states that the brainwave level necessary to work on issues such as stopping smoking, weight management, reduction of phobias, sports improvement, etc., is the alpha state. The alpha state is commonly associated with closing one's eyes, relaxation, and daydreaming...
Another physiological definition states that the theta state is required for therapeutic change. The theta state is associated with hypnosis for surgery, hypnoanesthesia and hypnoanalgesia, which occur more readily in the theta and delta states. It should be noted that hypnoanalgesia of the skin is a common test for somnambulism. Arm and body catalepsy are one of a few tests done to determine readiness for these surgical applications.
However, it is important to reflect upon the fact that both arm and body catalepsy can be induced in normal non-hypnotised subjects. Indeed, arm catalepsy is a standard stage-hypnotists test of susceptibility. Moreover, normal, non-hypnotised subjects can be found in any of these states of cortical arousal without also displaying any of the behaviour, traits or the enhanced suggestibility associated with being hypnotised.
A scientific theory attempts to describe and explain the behaviour of a natural or social phenomenon, following the principles of the scientific method. Good theories produce testable hypotheses which can be supported or refuted by experimental data. There are unfortunately many vague and untestable theories of hypnosis which continue to circulate, but high quality research is still published in peer-reviewed scientific journals.
Some theories of hypnosis attempt to describe hypnotic phenomenon in terms of brain activity while others concentrate more on the phenomenological experience. In either case, a fundamental distinction is between 'state' and 'non-state' theories of hypnosis. State theorists believe that an altered state of consciousness is a core part of hypnosis, whereas non-state theoriests believe that more mundane psychological processess such as focussed attention and expectation are sufficient to explain hypnotic phenomena. The precise definition of what constitutes an altered state of consciousness is a matter of some debate. Although many people who are hypnotised describe their experience as 'altered' it is difficult to use these terms in the absence of a prior definition.
Dissociation and neodissociation theories
Pierre Janet originally developed the idea of dissociation, literally a splitting-off of some components of consciousness, as a result of his work with hysterical patients. He believed that hypnosis was an example of dissociation: areas of an individual's behavioral control are split off from ordinary awareness. In this case, hypnosis would remove some control from the conscious mind and the individual will respond with autonomic, reflexive behavior. Weitzenhoffer describes hypnosis via this theory as "dissociation of awareness from the majority of sensory and even strictly neural events taking place."
Ernest Hilgard developed Janet's ideas and published his neodissociation theory in 1977. His theory, a classic 'state' theory, postulated an executive ego (essentially a central executive system in today's cognitive psychological terms) which became dissociated from sub-components via an 'amnesic barrier'. Suggestions from a hypnotist could produce alterations in perception and behaviour, which were explainable in terms of these dissociated sub-systems. Hilgard's ideas were influenced by his discovery of the 'hidden observer' phenomenon, a process by which different components of consciousness were investigated (other researchers, notably Spanos, believed the hidden observer to be an experimental artifact).
Social constructionism / Role-playing theory
This theory suggests that individuals are playing a role and allowing the hypnotist to create a reality for them. This relationship depends on how much rapport has been established between the hypnotist and the subject..
Generally, under hypnosis people become more receptive to suggestion, causing changes in the way they feel, think, and behave. Some psychologists (such as Sarbin and Spanos) have suggested that hypnosis is a social construct, so well-known that strong social expectations are played out by subjects, who believe they are in a state of hypnosis, behaving in a way that they imagine a hypnotized person would behave. Much experimental work has demonstrated that the experiences of hypnotized subjects can be dramatically shaped by expectations and social nuances. This view is often misunderstood: it does not discount the claim that hypnotized individuals are truly experiencing suggested effects, just that the mechanism by which this has taken place has in part been socially constructed and is not necessarily reliant on the idea of an altered state of consciousness
Barber theorizes that hypnosis is not a state or a trance and is not produced as the result of suggestions. He suggests that hypnosis is based on a number of overlapping variables, but, primarily, that interpersonal relationships allow the operator to restructure perceptions and conceptions of the subject. He theorizes that this occurs because the subject is relatively inattentive to the environment and, because of this misdirection of attention, the subject is willing to think as the hypnotist wants them to think.
Nicholas Spanos hypothesized that the behaviors associated with hypnosis are acted out knowingly by the person. He believes that all acts that are performed are done under the complete control of the hypnotized person. Spanos stood against Hilgard’s belief that hypnosis is another state of consciousness. Spanos worked for almost ten years on this theory completing sixteen experiments to reveal that many of the actions performed under hypnosis can be simply explained as something other than hypnosis. Spanos alleged that there are two reasons that cause people to misconstrue their state of consciousness as hypnosis. One of the reasons being that people believe that their behavior is caused by an external source instead of the self. The second is related to the way hypnotic rituals are performed. The hypnotist says certain things which are first interpreted as voluntary and then later on in the procedure as involuntary. An example being “relax the muscles in your legs” and then later “your legs feel limp and heavy.” Spanos argues that the hypnotist asks each person two connected requests. The first directly asking the subject to do something and the second being for the subject to infer the request as an involuntary one. Some hypnosis participants follow the first request and realize they are performing the task voluntarily while others do not respond at all. Still others follow both requests and therefore deemed great hypnosis subjects. Using another study, Spanos demonstrates that how people control their hypnotic experience by acting how they believe they are supposed to act during a hypnosis session. The study was performed on two groups of people. One group was given a lecture which included a segment on how arm rigidity was spontaneous during hypnosis and the second group did not. When both groups were hypnotized the group who was informed of the arm rigidity actually had arm rigidity during the session.A second study used by Spanos involved evaluating the analgesia effect in hypnotic and non-hypnotic individuals. The study performed the experiment on two groups of people and the only difference between the groups is that one group was told they were going to be hypnotized. Each participant was asked to put his or her hand in a bucket of ice and hold it there as long as possible. After removing their arm they were asked to rate their perceived pain. While awake those individuals who were expecting hypnosis had a much higher pain rating than those who were not expecting. All participants were hypnotized and then were asked to put their arm in the bucket of ice once more. The people who were not expecting hypnosis had about the same rating of perceived pain as their corresponding awake trial. The expecting participants had a much lower rating then their corresponding awake trial. Spanos claimed that this was due to the subjects wanting to be viewed as a great hypnotic subject. Spanos’ findings were not to prove that the hypnotic state did not exist at all but to prove that the behaviors exhibited by those individuals are due to “highly motivated” individuals.
Neuropsychological theory of hypnosis
Neuropsychological theories of hypnosis attempt to explain hypnotic phenomenon in terms of alterations in brain activity. Gruzelier, based on large amounts of EEG research, proposed that hypnosis is characterised by a shift in brain activity from anterior (front) to posterior (back).
Hypnosis as a state of hysteria
Charcot postulated that hypnosis was a symptom of hysteria and that only those people experiencing hysteria were believed to be hypnotizable. Although those exhibiting hysteria seem to be more suggestible, normal individuals are, indeed, hypnotizable which calls this theory into question.
Hypnosis as a conditioned process leading to sleep
Ivan Pavlov believed that hypnosis was a "partial sleep". He observed that the various degrees of hypnosis didn't significantly differ physiologically from the waking state and hypnosis depended on insignificant changes of environmental stimuli. Pavlov also suggested that lower brain stem mechanisms were involved in hypnotic conditioning.
Some modern well-known hypnotherapists subscribe to this theory, since in hypnosis, the subject typically appears to be asleep because of eye closure that is typically part of the induction procedure. However, there is quite a bit of literature on blood pressure, reflexes, physiochemical and EEG studies which indicates that hypnosis more closely resembles complete wakefulness.
Currently a more popular theory, it states the subject's attention is narrowed by certain techniques used by the hypnotist. As attention is narrowed, the hypnotist's words eventually take over the inner voice of the subject. From this theory comes the implication that only gullible or weak-minded people are suggestible. Some people, however, find the narrowing of attention to be desirable. Milton H. Erickson was said to have told his subjects, "... and my voice will go with you," meaning that Erickson's voice would be a comforting presence in the face of adversity and trouble.
This theory applies the concept of the brain-as-computer model. In electronic systems, a system adjusts its feedback networks to increase the signal-to-noise ratio for optimum functioning, called a "steady state". Increasing the receptability of a receptor enables messages to be more clearly received from a transmitter primarily by trying to reduce the interference (noise) as much as possible. Thus, the object of the hypnotist is to use techniques to reduce the interference and increase the receptability of specific messages (suggestions).
Research on Hypnosis
Much research has been conducted into the nature and effects of hypnosis and suggestion, and hypnosis continues to be a popular (if somewhat peripheral) tool in contemporary psychological research. A number of different strands of hypnosis research are apparent: that which examines the 'state' of hypnosis itself, that which examines the effects and properties of suggestions in and out of hypnosis, and that which uses hypnotic suggestion as a tool to research other areas of psychological functioning.
With the advent of recent brain imaging techniques (MRI, although also EEG and PET) there has been a resurgence of interest in the relationship between hypnosis and brain function. Any human experience is reflected in some way in the brain—seeing colors or motion is underscored by activity in the visual cortex, feeling fear is mediated by activity in the amygdala—and so hypnosis and suggestion are expected to have observable effects upon brain function. An important issue for researchers conducting brain imaging is to separate the effects of hypnosis and suggestion—knowing that a suggestion given during hypnosis affects brain area X does not just tell us about hypnosis, it tells us about the effects of the suggestion too. To account for this, experiments need to include a non-hypnotic-response-to-suggestion condition—only this way can the specific effects of hypnosis be examined.
A number of brain-imaging studies have been conducted which have used hypnosis, a selection are given below:
For example, one controlled scientific experiment postulates that hypnosis may change conscious experience in a way not possible when people are not "hypnotized", at least in "highly hypnotizable" people. In this experiment, color perception was changed by hypnosis in "highly hypnotizable" people as determined by positron emission tomography (PET) scans (Kosslyn et al., 2000). (This research does not compare the effects of hypnosis on less hypnotizable people and could therefore show little causal effect due to the lack of a control group.)
Another research example, employing event-related fMRI and EEG coherence measures, compared certain specific neural activity "during Stroop task performance between participants of low and high hypnotic susceptibility, at baseline and after hypnotic induction". According to its authors, "the fMRI data revealed that conflict-related ACC activity interacted with hypnosis and hypnotic susceptibility, in that highly susceptible participants displayed increased conflict-related neural activity in the hypnosis condition compared to baseline, as well as with respect to subjects with low susceptibility." Skeptics dispute the significance of such findings, claiming that such changes cannot be shown to be particular to the hypnotized state, and that any other action such as daydreaming is also likely to alter brain activity in some manner. The subject is still a matter of current research and scientific debate.
There is a long tradition (over a century) of hypnosis research (the majority of which not using brain imaging techniques) which has allowed scientists to test key ideas in the debate. Hypnosis has been shown to be an effective tool for pain relief, and when combined adjunctively with other therapeutic techniques it has been demonstrated to be a powerful tool (it is effective for weight loss, IBS, anxiety conditions and many more—the data for smoking cessation are more dubious).
Complex hybrid of social compliance
Current research points to the conclusion that what we term hypnosis is in fact a complex hybrid of social compliance, relaxation, and suggestibility that can account for many esoteric behavioral manifestations.
Psychologists such as Robert Baker claims that what we call hypnosis are actually a form of learned social behavior.
Some hypnotized subjects seem possessed, that is because possession involves a similar socio-cognitive context, a similar role-playing arrangement and rapport. Deep down, however, hypnotism, hysteria, and demonic possession share the common ground of being social constructs engineered mainly by enthusiastic therapists, showmen, and priests on the one side, and suggestible, imaginative, willing, fantasy-prone players with deep emotional needs or abilities on the other. The hypnotist and subject learn what is expected of their roles and reinforce each other by their performances. The hypnotist provides the suggestions and the subject responds to the suggestions. The rest of the behavior—the hypnotist’s repetition of sounds or gestures, his soft, relaxing voice, etc., and the trance-like pose or sleep-like repose of the subject, etc.—are just window dressing, part of the drama that makes hypnosis seem mysterious. When one strips away these dramatic dressings what is left is something quite ordinary, even if extraordinarily useful: a self-induced, “psyched-up” state of suggestibility.
Hypnosis Methodologies and Effects
The act of inducing a hypnotic state is referred to as an induction procedure. There is no current consensus on what the requirements are for an induction procedure to be effective; while some practitioners use simple calming verbal techniques, others use complex triggers, including mechanical devices.
Many experienced hypnotists claim that they can hypnotize almost anyone. They also claim it is a myth that people with strong will power cannot be hypnotized, as they claim these generally make the best participants. This is based on the idea that those who are most intelligent are also the most creative and as such they will make strong associations with the structure of language used by the hypnotist and by the visual or auditory representations inside of their mind. On the other hand, there is a common claim that no one can really be hypnotized against his or her will. The counter-claim given by many hypnotists is that while you cannot make someone do anything against their will, you can change what it is that they wish to do.
Many religious and cultural rituals contain many similarities with techniques used for hypnotic induction and induce similar states in their participants.
This school of thought holds that hypnosis as a state is very similar to other states of extreme concentration, where a person becomes oblivious to his or her surroundings while lost in thought. Often suggested as an example is when a driver suddenly finds himself much further down the road without any memory of driving the intervening distance (highway hypnosis), when a person is watching television and focuses so intently on the program that he ceases to be aware of the sides of the screen, or when a person is thinking on another subject while reading, then realizes that he has read several pages without conciously doing so or taking in any of the content.
The act of hypnotizing, is, in effect, the act of manually inducing a similar state (See, for example, general information on the ASCH website).
Psychologists have produced controversial studies that seem to show a strong correlation between the ease of putting someone in a state of hypnosis and their level of suggestibility. Some of these studies have produced the Harvard scale, Stanford scale, and eye-roll test; all of which are supposed to predict how easily a person can be put in a hypnotized state.
Hypnosis has further been described as "The suspension of the critical factor" which expands on the idea of "increased suggestibility". A person who claims to be hypnotized may accept statements as true that he or she would normally reject.
For example, when told "you have forgotten your name," the subject in a normal state would react with disbelief, but under hypnosis people have claimed that they have, indeed, forgotten their own names.
It often appears as if the hypnotized participant accepts the authority of the hypnotist over his or her own experience. When asked after the conclusion of such a session, some participants appear to be genuinely unable to recall the incident, while others say that they had known the hypnotist was wrong but at the time it had seemed easier just to go along with his instructions. (Richard Feynman describes this in his memoir Surely You're Joking, Mr. Feynman! as his own experience under hypnosis.) The mechanism of this effect is however disputed: Some hypnotists would claim that this showed the difference between a deep and a shallow hypnotic trance, while skeptics would question the validity of this conclusion, citing that such effects can be duplicated in other circumstances where an agent holds authority, such as the Milgram experiment, and suggest that unreliability in results discredits a scientific theory of hypnosis.
Some believe that hypnosis can affect the subject's judgment and therefore could potentially cause them harm. In the hand of a "professional" seeking to promote the subject's welfare, those of this opinion believe, hypnosis can produce profound effects and be a complement to treatment. Some of those who believe in hypnosis believe that in most cases one can resist hypnosis if one is aware of it. However, some of those who hold this belief also believe in brainwashing and/or mind control and believe that when hypnotism takes place in the context of these, resisting hypnosis is far more difficult. These beliefs are not generally based on scientific evidence, as there is no scientific consensus on whether mind control even exists, let alone whether it is more difficult to resist hypnotism in the context of this unverified theoretical construct.
Some psychologists and other mental health professionals are concerned that practitioners of hypnosis might evoke intense emotions in their clients that they are untrained to handle. These abreactions might occur when spontaneously or purposefully recalling traumatic events or, some believe, spontaneous mental breakdowns.
Hypnotherapy is a term to describe the use of hypnosis in a therapeutic context. Many hypnotherapists refer to their practice as "clinical work." Hypnotherapy can either be used as an addition to the work of licensed physicians or psychologists, or it can be used in a stand-alone environment where the hypnotherapist in question usually owns his or her own business. The majority of certified hypnotherapists (C.Hts in the US, Diploma. Hyp in the UK) today earn a large portion of their money through the cessation of smoking (often in a single session) and the aid of weight loss (body sculpting). Some of the so called 'incurable' diseases have shown to be treatable with the mind-body (such as cancer, diabetes, and arthritis). Some of the treatments practiced by hypnotherapists, in particular so-called regression, have been viewed with skepticism.
The American Medical Association and the American Psychological Association have both cautioned against the use of repressed memory therapy in dealing with cases of alleged childhood trauma, stating that "it is impossible, without other corroborative evidence, to distinguish a true memory from a false one", and so the procedure is "fraught with problems of potential misapplication". This is why Forensic Hypnosis is not widely used in many countries' legal systems.
The American Society of Clinical Hypnosis is an organization that "promotes greater acceptance of hypnosis as a clinical tool with broad applications". Hypnosis is applied to a great range of both physical and psychological ailments, rather than being restricted to purely psychological phenomena. The society was founded by Milton Erickson, a doctor who attempted to put hypnosis on a firm therapeutic backing in the 1950s.
Milton H. Erickson was opposed to non-board-licensed healthcare professionals performing therapeutic hypnotism, which has since caused difficulty for certified laymen willing to practice. In the United States, certified lay hypnotists are now said to perform "non-therapeutic issue-resolution hypnotism", rather than "hypnotherapy". Recently, there are reports that efforts to reduce obesity with hypnosis (when used in combination with cognitive behavioral therapy, exercise, and a low-fat diet) may be effective.
Milton Erickson's technique of hypnosis was later called the Ericksonian technique
Self-hypnosis (or autosuggestion) hypnosis in which a person hypnotizes himself or herself without the assistance of another person to serve as the hypnotist—is a staple of hypnotherapy-related self-help programs. It is most often used to help the self-hypnotist stay on a diet, overcome smoking or some other addiction, or to generally boost the hypnotized person's self-esteem. It is rarely used for the more complex or controversial uses of hypnotism, which require the hypnotist to monitor the hypnotized person's reactions and responses and respond accordingly. Most people who practice self-hypnosis require a focus in order to become fully hypnotized; there are many computer programs on the market that can ostensibly help in this area, though few, if any, have been scientifically proven to aid self-hypnosis.
Some people use devices known as mind machines to help them go into self-hypnosis more readily. A mind machine consists of glasses with different colored flashing LEDs on the inside, and headphones. The LEDs stimulate the visual channel while the headphones stimulate the audio channel with similar or slightly different frequencies designed to produce a certain mental state. A common occurrence is the use of binaural beats in the audio which is said to produce hypnosis more readily.
The use of hypnosis in dentistry has a long history. Dealing with hypnodontia—the use of hypnosis in dentistry—has attested to the increasing sophistication of hypnotic procedures to deal with the special problems of the dental patient. Besides smoothing out dental procedures by way of its generalized anti-anxiety effects, it can increase overall patient comfort, make the dental experience acceptable and bearable, decrease resistance to future intervention, and through posthypnotic suggestions, encourage more rapid recovery.
Obstetric application (painless childbirth)
The practice of hypnotically assisted deliveries has a history of over a century. Falling into disfavor due to competition from chemical anesthesia, hypnosis has seen a revival in the last two decades. One important reason for this comeback is the realization that hypnosis may find usefulness not only in obstetric analgesia or anesthesia, but also in all phases of giving birth from pregnancy to postpartum recovery.
Scientific knowledge of hypnosis applied to Legal problems is called forensic hypnosis. Courts prior to 1968 consistently excluded post-hypnotic testimony on the grounds that it was unreliable and apt to influence a jury unduly. Now hypnosis practice is growing stronger and still admissible in courtroom testimonies as long as the stringent criteria and guidelines are met. American Law Institute’s Model Penal Code specifies Crime done by hypnotic Suggestion & Witness evidence in court after Hypnotic suggestion are not valued. In the U.S., Oregon, Texas, Indiana, Nevada, and California states have separate hypnotic investigation acts. Nevada courts accept hypnotically refreshed statements as evidence for judgment. Russia generally uses hypnosis in criminal investigations.
Influencing the crowds of common longings and yearnings by a demagogue is called mass hypnosis. Generally mass hypnosis is applied to religious sessions. Many forms of music and dance can be used to create religious trance.
In stage hypnosis, a hypnotist carefully chooses volunteers from the audience, puts them into a trance using hypnosis and then plants suggestions for them to perform. The critical factor in all stage hypnosis shows is the choice of enthusiastic and credulous individuals. Various techniques exist for discerning whether an individual is a likely candidate for a hypnosis stage act. Often, the sheer willingness of audience members to volunteer is a sign that they will "go along with" the hypnotist's suggestions during the show, whether or not they ever really become hypnotised in the first place. For example, the volunteers may be made to believe they are drunk, aliens speaking a strange alien language, naked or seeing others naked, 6-year-old children, ballet dancers etc. Such suggestions are designed to be temporary, lasting the duration of the show. Stage hypnosis is a unique performance in that it involves "real" people from the audience responding in a variety of ways, making no two shows the same. There has been debate over the years as to whether some degree of fraud or collusion may be involved in some stage hypnosis acts.
Regarding the phenomenon of stage hypnotism, Jon Connelly, Ph.D., a therapeutic hypnotist, writes:
In addition to direct application of hypnosis (that is, treatment of conditions by means of hypnosis), there is also indirect application, wherein hypnosis is used to facilitate another procedure. Some people seem more able to display 'enhanced functioning', such as the suppression of pain, under hypnosis.
One of the major initial applications of hypnotism was the suppression of pain during medical procedures; this was supplanted (in the late 19th century) by the development of more reliable chemical anesthetics.
Some studies suggest that while hypnosis may possess these qualities, they are not exclusive to hypnosis, that it is often the drama and fantasizing that produces the behavior.
Objective Signs of the Hypnotic State: Breuer's Absent Pupillary Reflex Sign
For those who discount the trance state completely, this is an objective sign, and is the opposite of the normal physiological response. When the subject/patient/client is in 'deep' hypnosis she/he is asked to stay in hypnosis and open their eyes. The pupils are usually dilated. When a penlight is shone into the eyes the pupils will usually stay dilated or react poorly (the normal non-hypnotic response being contraction). What is meant by 'deep hypnosis' is debatable as is the terminology used for that state (somnamulistic, Esdaile, Ultradepth, etc.). This is a brief test and will not take away from therapy. (Dr. William Breuer popularized this test in University lectures to his students after conducting a research project that involved professionals in multiple sites from three countries.) Historically, one particularly early mention of the absent pupillary reflex sign is found in what is deemed one of the more archaic and esoteric books of hypnosis literature called 'Hypnotism' by Carl Sextus, which stated that when people are asked to open their eyes while remaining in deep trance and then when a light is shone into their eyes, their pupils won't contract. He further stated that one could use any suggestion the hypnotist wishes to keep them in hypnosis, but at this point in the trance to not use any suggestions relating to their eyes, visual focus, light or the pupils' dilation and contraction.
Professional associations and governmental authorities
Several types of organizations exist to further the professionalism and regulation of practicing hypnotists. For example, professional associations typically offer opportunities for collegial exchanges and professional development in general and/or specialized areas of hypnosis. They also may establish codes of conduct and standards for various certification programs. They may offer such certification programs directly or approve third-party programs. Organizations not affiliated with any professional association may offer their own certificates as well.
Governmental authorities, such as state licensing agencies, may establish minimum requirements for credentials that must be earned before one may practice hypnosis within their jurisdiction. Such credentials typically are called certificates or licenses. Some noteworthy examples of professional associations and governmental authorities that offer certification, licensure or statutes that regulate hypnosis follow.
The notion of hypnotism has elicited many presentations in popular culture. Intrinsically, the notion that people are susceptible to commands outside their conscious control can be an effective way of representing the notion of the fallible narrator. Many works of fiction, such as movies, television programs, and comic books portray hypnotism as a form of total mind control, however most authorities agree that this is an exaggeration.
Hypnosis and the judiciary system
Hypnotism can be used to:
In addition, it has been expanded to the notion of remembering "past lives", that is, previous reincarnations of the subject, in such movies as Dead Again.
Recollection of knowledge via hypnosis has been used in many cases, but its effectiveness is disputed. Proponents claim that recovered memories have aided in the solving of many crimes, often corroborating with physical evidence which would have been impossible to obtain otherwise. Skeptics suggest that such successes are a function of simple chance, pointing to cases where its use on victims of rape or attempted murder to help them jog their memory in identifying an accused has caused sentences to be doled out to the wrong person. This is because the hypnotist might make suggestions that are more likely to be remembered as "truth". Most experts recommend that the practice be used at most like a lie detector, to glean more information, and never as the smoking gun.
Hypnosis has proven beneficial, but not in expected ways. During the Hillside Strangler trial, Kenneth Bianchi claimed a split personality carried out the crimes of which he was accused. Hypnosis was used extensively to prove that a second personality existed. However, due to faults in Bianchi's facade, which went contrary to what normally happens during hypnosis, it was proved that no other personalities existed and his insanity defense was discredited.
Hypnosis when properly used, can be a very useful tool.
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