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James Braid coined the term 'hypnosis' in the 1840s, adapting it from Hypnos, the Greek deity of sleep, after first calling the phenomenon 'neurypnology'. He later recognized the state was not true sleep and attempted to rename it 'monoideism'.
Socio-cognitive role theory, associated with researchers such as Theodore Sarbin and Nicholas Spanos, holds that hypnotic behavior reflects absorbed role enactment shaped by context, expectancy, and demand characteristics rather than an altered state.
Hilgard proposed that hypnosis creates a division of consciousness in which one stream responds to suggestion while a monitoring 'hidden observer' retains information outside awareness. This divided-control model was used to account for analgesia and amnesia.
Braid moved away from magnetic fluid theories and developed a practical method using prolonged eye fixation followed by verbal suggestion, establishing hypnosis as a psychological procedure. This shift is often described as the transition from magnetism to suggestion.
Liébeault and Bernheim at Nancy argued that hypnotic responses result from ordinary suggestion and are not restricted to pathological individuals. Charcot's Salpêtrière position treated hypnosis as a manifestation of hysteria.
The Stanford Hypnotic Susceptibility Scale, developed by Weitzenhoffer and Hilgard, uses a standardized series of suggestions to grade hypnotic responsiveness. The other instruments measure personality, affect, or mood rather than hypnotizability.
In hypnotic analgesia studies, a concealed part of awareness sometimes reported a level of pain that the hypnotized participant had denied, supporting the idea of divided consciousness. This finding is central to neodissociation accounts.
The 1784 Franklin commission concluded that magnetic effects arose from imagination, expectation, and touch rather than from a physical fluid. This early controlled investigation is often cited as a landmark in the empirical study of suggestion.
Classical conditioning explains how a neutral cue, such as a spoken induction phrase, can come to elicit a suggested response after repeated pairing with the intended experience. This behavioral account complements expectancy-based explanations.
The debate centers on whether hypnosis involves a qualitatively distinct altered state or can be fully explained by ordinary processes such as imagination, expectancy, and absorption. Both positions accept that hypnotic responses are real and clinically useful.
Auke Tellegen developed the absorption construct and the Tellegen Absorption Scale, describing absorption as openness to engaging attentional resources in experiential events. Absorption is correlated with hypnotic responsiveness.
Trance logic describes a willingness to accept incongruous perceptions, such as perceiving a hallucinated figure while also acknowledging the actual object present, without evident discomfort. Orne used this to argue for a genuine hypnotic state.
Kirsch argued that hypnotic responding resembles placebo responding, in that expectancy for a suggested outcome produces the experience. This view treats hypnotic effects as genuine but not requiring a special state.
John Elliotson promoted mesmerism at University College Hospital in London in the 1830s and 1840s, provoking controversy and eventual institutional resistance. His work illustrates early medical engagement with hypnotic methods.
The correlation between hypnotizability and measures of imaginative involvement supports the absorption account, in which responsiveness reflects deep attentional engagement in experience. This is a trait-level association rather than a situational artifact.
Hypnotizability is conceptualized as a relatively stable individual-difference dimension reflecting responsiveness to hypnotic suggestions. It is assessed with standardized scales and is distinct from intelligence or diagnostic status.
Research generally finds modest associations between hypnotizability and constructs such as absorption and openness to experience, with no single personality trait accounting for most variance. This supports a multidimensional view of responsiveness.
A suggestion is a communication designed to elicit an experiential or behavioral response without coercion, relying on the participant's engagement rather than force. This distinguishes suggestion from command or physical stimulation.
Braid proposed 'monoideism' to emphasize a dominant idea or fixation of attention rather than sleep, reflecting his revised understanding of the phenomenon. The term did not replace 'hypnosis' in common usage.
Demand characteristics are implicit cues that communicate what the experimenter expects, potentially shaping participants' reports independent of any hypnotic effect. Orne highlighted them as a methodological concern in hypnosis research.
The two perspectives disagree about mechanism, with one emphasizing divided consciousness and the other social and cognitive processes, but neither dismisses hypnotic experiences as unreal. Both have generated empirical research using standardized methods.
The Stanford Hypnotic Clinical Scale was designed as a short, clinically practical measure of hypnotic responsiveness for use with patients. It addresses the need for brief assessment outside lengthy laboratory protocols.
The Society for Clinical and Experimental Hypnosis, founded in the mid-twentieth century, helped establish hypnosis as a field of rigorous clinical and experimental inquiry. It supported standardized research and professional standards.
The experience of observing oneself respond while remaining aware resembles the divided-consciousness description central to neodissociation theory. It posits concurrent streams of awareness rather than a single unified state.
Hypnotic susceptibility refers to an individual's stable capacity to experience suggested effects, typically assessed with standardized induction and suggestion scales. The other terms name specific phenomena that a susceptible person might display, not the general trait itself.
Standardized scales generally yield a broad distribution in which a large middle group shows moderate responsiveness, with smaller high and low tails. It is not a flat or purely bimodal spread, though some researchers emphasize a low-responding subgroup.
Brief behavioral suggestion tasks, such as eye-closure or pendulum-style suggestions, give a fast index of responsiveness to simple suggestions. History taking, personality testing, and EEG do not directly test whether a suggested effect occurs.
Research generally finds only weak associations between hypnotic susceptibility and broad personality dimensions like extraversion or neuroticism. Susceptibility is therefore treated as a relatively distinct capacity rather than a simple facet of ordinary personality.
Suggestibility concerns responsiveness to suggestions and can be observed with or without a formal hypnotic induction. It is broader than induction speed, imagery vividness, or resistance to misleading questioning, though those may correlate with it.
Correlated performance across different suggestion types supports a general responsiveness factor underlying many hypnotic phenomena. It argues against independence and against the idea that individual differences are absent.
Suggested sensory alterations, such as a change in taste or smell, test whether a person reports a modified perceptual experience. The other options are motor suggestions involving movement or stillness rather than sensory change.
Hypnotic analgesia is the reduction of experienced pain following suggestion. Hypermnesia concerns enhanced memory, age progression concerns moving forward in time, and catalepsy concerns maintained limb posture, none of which describe pain reduction.
Suggested amnesia is usually a temporary effect that lifts when the clinician gives a prearranged reversal cue. It is generally not permanent, does not necessarily reflect true memory erasure, and can be assessed with standardized suggestion tasks.
A positive hallucination is the suggested perception of something that is not there, such as an imaginary fly. A negative hallucination would be failing to perceive something present, while analgesia and catalepsy concern pain and posture.
A negative hallucination is the suggested failure to perceive an actually present object, so success is shown by denying that the chair is there. Detailed or altered descriptions indicate that the object was still perceived.
Age regression usually produces behavior and self-report consistent with the suggested age while reflecting the person's current knowledge and expectations. It does not reliably recover forgotten memories, permanently erase adult knowledge, or produce genuine prediction of the future.
Catalepsy is the maintenance of a limb in a suggested posture, often described as feeling effortless. Analgesia, amnesia, and hypermnesia concern pain, forgetting, and memory enhancement respectively.
The hidden observer is generally interpreted as evidence that awareness can be divided, with one stream reporting pain while the suggested analgesia is maintained. It is not taken as proof of deception, impossibility of analgesia, or absence of suggestion effects.
Absorption, the tendency to become deeply engaged in imaginative experiences, shows one of the more consistent positive associations with hypnotic responsiveness. Low intelligence, a need for chaos, and blanket skepticism are not established predictors.
Scripted procedures standardize administration so that scores can be meaningfully compared across people and studies. They do not guarantee success, replace suggestions, or erase the individual differences that the scales are designed to measure.
Responsiveness to suggestion is not strictly dependent on a formal induction and can be observed in waking imaginative contexts. This does not imply inability to be hypnotized, and inductions do not reliably produce maximum responsiveness in everyone.
A posthypnotic response is an action carried out after the hypnotic session, usually triggered by a cue arranged during it. Posture change, relaxation, and in-session analgesia all occur during the session rather than afterward.
Identical suggestions can produce different experiences because people vary in imagery ability and general responsiveness. Inferring administration error, deliberate noncooperation, or a total disconnect from responsiveness is not warranted by this difference alone.
Hypnotic hypermnesia refers to suggested improvement in memory retrieval. Amnesia is its opposite, while catalepsy and analgesia concern posture and pain rather than memory enhancement.
Cavitary upper-lobe disease with surrounding infiltrate is a classic radiographic pattern of active, potentially infectious pulmonary tuberculosis. Such patients require airborne isolation and sputum testing before further evaluation. Calcified granulomas represent healed disease and do not indicate current infectiousness.
Documented immediate hypersensitivity with airway involvement indicates a risk of anaphylaxis on re-exposure, so the triggering agent should be avoided pending allergy consultation. Antihistamines alone do not prevent anaphylaxis. Premedication and provocative testing decisions belong to allergy specialists, not routine practice.
A systolic blood pressure of 78 mm Hg represents hypotension and signals hemodynamic instability that must be addressed before elective interventions. Normal adult values for heart rate, respiratory rate, and temperature fall within the ranges listed in the other options.
Antiplatelet therapy decisions require balancing bleeding risk against thrombotic risk, so the prescribing clinician should be involved in planning discontinuation. Abrupt self-directed changes can cause stent thrombosis or other thrombotic events. The timing depends on the specific procedure and the indication for the drug.
Forgetting recent conversations plus getting lost in a familiar area suggests impairment in memory and orientation beyond normal aging, warranting formal cognitive assessment before consent. Occasional misplaced items and fatigue are common and nonspecific. Sleep-onset difficulty alone does not imply decisional incapacity.
Serum creatinine reflects renal function and determines whether renally cleared or nephrotoxic drugs can be given safely. Potassium abnormalities matter but do not define clearance. Hemoglobin and platelets reflect different systems and do not guide nephrotoxic dosing.