Hypnosis and Suggestibility

Hypnosis and Suggestibility

Linas Juozenas
Intelligence Unleashed · Suggestion, experience and agency

Attention can change experience—without suspending truth, consent or intelligence

Hypnosis is a structured use of attention, expectation, imagination and suggestion. It can alter how pain, effort, movement, perception or a rehearsed response is experienced. It is not sleep, supernatural control or a detector of hidden truth. Used well, it can support a person’s own goals; used carelessly, it can inflate confidence, blur memory and exploit trust.

Clinical hypnosisPainHypnotizabilityHabitsMemory accuracyEthics
FocusNarrow or reorganize attention around a chosen experience
ExpectationEstablish a credible prediction about what may happen next
ImaginationSimulate sensations, actions, meanings and future situations
LearningRehearse responses that can later occur with less effort
The essential correction

Not mind control

Many participants remain aware of the room, remember the session and can question or reject a suggestion. Responses may still feel automatic because hypnosis can alter the experienced effort and authorship of an action.

A human difference, not a hierarchy

Responsiveness is not gullibility

People vary in hypnotic responsiveness, but a standardized score is not a measure of intelligence, honesty, weakness or moral worth. High intelligence does not prevent response, and modest response does not make someone defective or “blocked.”

01 · Name the process accurately

A precise vocabulary prevents mystical conclusions

The same word is often used for a research procedure, a therapeutic method, a stage performance and an audio recording. Those are related contexts—not interchangeable evidence.

Terms that should not be collapsed into one another
Term Useful meaning What it does not establish
Hypnosis A procedure involving focused attention, reduced attention to some peripheral information and an enhanced capacity to respond to suggestion.1 One unique trance state, sleep, unconsciousness or loss of choice.
Hypnotic induction Instructions intended to orient attention and expectations before suggestions are offered. A compulsory gateway. Some responses can occur without a formal induction.
Suggestion An invitation to experience an idea—such as coolness, heaviness, comfort, movement or a future cue—as if it were becoming more immediate. A command that bypasses all values, knowledge and context.
Posthypnotic suggestion A suggestion intended to influence a later response when a specified cue or situation occurs. Permanent programming or proof that a hidden mind obeyed.
Clinical hypnosis Hypnotic methods used within appropriate medical, dental or psychological care. A separate profession that makes someone qualified to treat every condition.
Self-hypnosis A person deliberately guides their own attention, imagery and suggestions. A guarantee that the method is suitable, accurate or harmless for every goal.
Hypnotizability Measured responsiveness to a set of standardized suggestions under defined conditions. Credulity, intelligence, virtue, weakness or diagnostic status.

The consensus definition is deliberately procedural: it describes conditions in which suggestion may have stronger experiential effects, not one settled “trance state.” Words, expectations and social context can also influence perception outside formal hypnosis.2

02 · A collaborative sequence

What happens in a responsible session

The theatrical image begins with a command. Clinical work should begin with an agreement.

  1. ContractDefine the goal, limits, alternatives and right to stop
  2. OrientSet posture, attention and expectations without deception
  3. SuggestOffer vivid, flexible and goal-relevant possibilities
  4. ExperienceNotice sensations, imagery, movement or emotional change
  5. RehearseLink the useful response to a real future situation
  6. EvaluateReorient fully and test benefit, accuracy and unwanted effects

Induction is orientation

Eye fixation, breathing, relaxation, counting and imagery are common, but relaxation is optional. Hypnosis can occur with eyes open or during an alert procedure. An induction organizes attention and expectation; it is not an all-or-none switch.

Suggestions are experiments

“You may notice warmth” leaves room to observe; “your hand is numb” makes a stronger prediction. Credibility, imagery, motivation and relationship all matter. Useful wording fits the person’s goal and remains open to revision.

Reorientation is integration

A session should end with full orientation to time, place and ordinary choice. The practitioner checks what changed, whether any suggestion remains active and how benefit will be tested. Dramatic experience is not the endpoint; safer functioning is.

A response can feel involuntary without being externally controlled

Hypnotic responses can feel less deliberately produced. Agency models examine how altered predictions and monitoring create that experience.4 It is genuine, but it does not give another person ownership of the participant’s decisions.

03 · Several processes, no final single theory

How hypnotic suggestions may alter experience

The best-supported explanation is not a hidden substance called “trance.” It is coordinated change in attention, expectation, interpretation, imagery, learning and social context.

AttentionSelect and suppressA sensation or image becomes foreground while competing signals receive less processing.
ExpectationPredict what comes nextCredible predictions can shape perception, effort and the interpretation of ambiguous signals.
ImaginationSimulate vividlyImagined movement, temperature, place or comfort can recruit systems involved in actual perception and action.
AgencyChange authorshipA response may be experienced as automatic when conscious prediction and monitoring are reorganized.
LearningRehearse a cueRepeated associations can make a chosen response easier to retrieve in a later situation.

Theories emphasize altered control, dissociation, predictive processing, response expectancy, social cognition and metacognition. A 2024 systematic review found no single mechanism that explains every phenomenon.3

Meaning changes sensation

Pain is a protective experience built from nociception, attention, expectation, learning, threat and bodily state. Hypnotic analgesia may alter some of these components. This does not make pain imaginary; it shows that sensation is biologically interpreted.

Effort changes performance

A suggestion of ease may reduce anxiety or over-monitoring and improve fluency. It may also increase confidence without correctness. Each claim therefore needs its own outcome: distress, movement, abstinence, recall accuracy or another measurable result.

Mechanism is not efficacy. A changed brain signal or rating does not prove that the procedure treats a disorder, outperforms an active therapy or lasts.

04 · The brain follows the task

There is no universal “hypnosis center”

Brain imaging can reveal patterns associated with a particular induction, suggestion or response. It cannot photograph surrender, truth or a hidden subconscious.

Control and monitoring

Prefrontal and anterior cingulate regions often appear in studies of focused attention, conflict, expectancy and altered agency. Their involvement varies with the suggestion and whether a person is initiating, inhibiting or reinterpreting a response.

Salience and bodily meaning

Insular and cingulate systems help represent bodily state and behavioural relevance. They may participate when pain, effort or internally generated sensation changes, but they do not constitute a single “trance circuit.”

Sensory and motor construction

Suggestions concerning vision, touch, movement or pain can modify activity in task-relevant sensory and motor systems. The pattern should differ because the requested experience differs.

Neuroimaging repeatedly implicates control, salience, default-mode, sensory and motor systems, with substantial variation by task.5 Resting-state reviews identify possible connectivity differences, but not a diagnostic or universal neural signature.6

A colourful activation map does not reveal obedience

fMRI and EEG are indirect, model-dependent measurements. Results vary with instructions, comparisons, movement, analysis and participant selection. No correlation can reveal whether an individual is truthful, intelligent, safe or vulnerable to control.

05 · Individual differences

Hypnotizability is measurable—but not destiny

Some people experience vivid perceptual changes and automatic movement; others respond mainly through relaxation or deliberate imagery. A score summarizes performance on selected suggestions, not the whole person.

MotorArm heaviness, movement, inhibition or altered effort
SensoryChanges in pain, touch, taste, sound or visual experience
CognitiveAttention, amnesia suggestions or altered access to information
ExperientialAbsorption, automaticity, vividness and felt depth

Psychometric work supports a broad factor shared across hypnotizability tests while leaving room for suggestion-specific abilities.7 Response can also vary with wording, motivation, fatigue, practice and the relevance of the goal.

Prediction is probabilistic

Higher suggestibility predicts stronger average clinical response, but imperfectly; lower-scoring participants can still benefit.8 A single screening score should guide adaptation, not deny care.

Labels can become suggestions

Calling someone “not hypnotizable” may suppress experimentation; calling them exceptionally suggestible may pressure performance or disclosure. Scores are guidance, not identity or authority.

Intelligence and hypnotizability answer different questions. One concerns learning and reasoning; the other concerns responsiveness to selected suggestions. Neither can be inferred from stage behaviour or visible relaxation.

06 · Match claims to comparisons

The clinical evidence map

Across health conditions, results are generally more favourable against no intervention or usual care than against credible active treatments. Protocols, practitioner skill, outcomes and study quality vary.

What current evidence can—and cannot—support
Application Reasonable conclusion Central limitation
Procedural pain and anxiety Hypnosis can produce small-to-moderate average benefits as an adjunct in some invasive procedures. Large variation in procedures, controls, scripts and blinding; not a replacement for indicated anaesthesia or analgesia.
Clinical pain Benefits are modest on average versus inactive comparators; some people respond meaningfully. Certainty is often low, and superiority over relaxation, education or CBT is not consistent.
Irritable bowel syndrome Gut-directed hypnotherapy is a promising, condition-specific brain–gut intervention. Substantial heterogeneity; delivery format, comparator and population matter.
Anxiety and distress Hypnosis may reduce anxiety, especially when integrated with established care. Studies pool different disorders and interventions; expectancy and attention controls are difficult.
Smoking cessation Some individuals quit after hypnotherapy, but it has not shown reliable superiority over other support. Low-certainty evidence, variable verification and incomplete adverse-event reporting.
Weight and eating behaviour Self-hypnosis may support satiety, coping or adherence for some people. Primary weight outcomes are inconsistent; repetition and motivation confound interpretation.
Learning and memory Suggestions may reduce anxiety or make retrieval feel easier. Confidence and speed can improve without accuracy; regression can increase false-memory risk.

An umbrella review of 49 meta-analyses covering 261 distinct randomized trials found benefits across several outcomes, alongside wide variation in review quality, controls and reporting.9 The useful question is: which protocol, for whom, compared with what, for which outcome and for how long?

07 · Pain and procedures

A useful adjunct is not a universal anaesthetic

Hypnotic analgesia is among the best studied applications. The evidence is meaningful, but the size and certainty depend strongly on whether the pain is experimentally induced, procedural or part of a clinical condition.

Clinical pain

A 2024 review included 88 studies and more than 7,000 participants. Added benefits were small and certainty often low because of bias, heterogeneity and imprecision.11 An average can contain strong responders and nonresponders.

Medical procedures

A 2025 review of 20 randomized trials and 1,250 participants found small average reductions in procedural pain and anxiety, with substantial variation.12 Procedure-specific preparation is more defensible than a generic recording promising numbness.

Experimental pain

Laboratory studies show that suggestion can alter controlled pain responses, especially in highly suggestible participants.13 Experimental heat or cold is not equivalent to surgery, neuropathy or undiagnosed pain.

Meta-analysis across acute and chronic pain supports a real but heterogeneous average effect.14 Responsible care identifies the medical problem, retains indicated treatment and measures function or distress—not only an immediate rating.

  • Do not use reduced pain to infer that tissue injury is absent.
  • Do not drive or operate machinery while absorbed in an audio exercise.
  • Do not stop analgesics, anaesthesia or rehabilitation because a session felt powerful.
  • Measure function, distress and medication effects—not only an immediate rating.
08 · Body–brain regulation

Gut symptoms, anxiety and the value of specificity

Hypnosis is most credible when the protocol is designed for a defined condition and embedded in appropriate assessment—not when one script is advertised for every symptom.

Gut-directed hypnotherapy

Gut-directed protocols use imagery and suggestions about digestive sensitivity and regulation, not a search for a hidden psychological cause. A 2025 review included 12 studies and 1,158 patients; global symptom estimates were highly heterogeneous, while the pooled pain effect was smaller and more consistent.15

This is a condition-specific brain–gut treatment. It should not be generalized to inflammatory disease, bleeding, weight loss, fever or other symptoms requiring medical investigation.

Anxiety and anticipatory distress

Hypnosis may combine attention, imagery, exposure rehearsal and coping suggestions. Meta-analysis supports anxiety reduction, with results shaped by whether hypnosis stands alone or supplements another intervention.16 Adding it to cognitive behavioural treatment may improve some outcomes, but studies vary.17

The goal is not to erase every alarm signal. It is to reduce unnecessary distress while preserving accurate threat detection and voluntary action.

Symptom relief and explanation are different achievements

Symptom relief does not reveal why a symptom began. Improvement is not proof that illness was “all in the mind,” and a vivid metaphor is not a diagnosis. Assessment remains necessary.

Self-hypnosis as a practiced skill

A review of 22 randomized self-hypnosis trials found a favourable pooled effect across varied uses, with substantial methodological diversity. Explicit teaching and repeated self-practice appeared more useful than passive listening alone.18 The aim is a skill the person can initiate, not dependence on authority.

09 · Behaviour does not live in one hidden switch

Smoking, eating and habit change

A habit is a learned relationship among cues, rewards, bodily states, opportunities and repeated actions. Hypnosis may support one part of change; it does not erase dependence, environment or physiology.

DefineName one observable behaviour, not “fix my subconscious.”
MapIdentify cues, needs, rewards, obstacles and high-risk contexts.
RehearseImagine the cue and practice a concrete alternative response.
SupportAdd evidence-based treatment, social help and environmental design.
MeasureTrack behaviour over time and plan for lapses without shame.

Smoking cessation

The Cochrane review found no reliable evidence that hypnotherapy yields greater long-term abstinence than other behavioural support or no treatment; certainty was low and harms poorly reported.19 A 2024 trial found hypnotherapy and CBT produced similar results, not hypnotic superiority.20

Someone may still find hypnosis motivating, but it belongs beside accurate information about nicotine dependence and established cessation support. One dramatic session is not durable abstinence.

Weight, satiety and eating behaviour

In a randomized obesity trial, self-hypnosis did not significantly improve the primary one-year weight outcome overall. Frequent practice correlated with greater loss and some secondary benefits, but that comparison was not randomized.21 Another trial reported reduced food impulsivity in a selected group; broad conclusions remain premature.22

Identity language can motivate—and can also stigmatize

Identity suggestions may organize motivation, but relapse does not prove weak character and body weight is not governed by belief alone. Sleep, medication, pain, food access, stress, illness and environment matter. Ethical practice supports behaviour without converting complexity into blame.

10 · Confidence is not accuracy

Learning, memory and the danger of false certainty

Hypnosis may change how accessible a memory feels. That is not the same as recovering a complete recording of the past.

What may improve

Hypnosis may reduce test anxiety or establish a calm retrieval cue. A review covering 12 studies and 515 students was encouraging but methodologically diverse.23

In a 2024 experiment with 24 highly suggestible adults, a posthypnotic cue produced faster, more confident recognition decisions.24 Accuracy did not improve: access felt better without becoming more correct.

What can go wrong

Regression, repeated imagery and leading questions can turn possibilities into compelling recollections. A 2025 review describes how hypnosis can contribute to pseudo-memories and false confidence.25

Use hypnosis to support learning—not to manufacture evidence
Goal Safer use Unsafe inference
Study confidence Rehearse beginning calmly, retrieving an outline and tolerating temporary uncertainty. “Feeling fluent proves I know the material.”
Recall Use neutral cues, then verify against notes, records and independent evidence. “Hypnosis recovered the exact original event.”
Witness interviewing Use evidence-based, non-leading forensic protocols administered by trained professionals. “More details after hypnosis must be more accurate.”
Trauma care Work with current symptoms, consent, stabilization and uncertainty. “Symptoms prove one buried event that the therapist can uncover.”

A better learning sequence

StudyBuild accurate knowledge with explanation and examples.
RetrieveAttempt recall without looking and tolerate effort.
CheckCompare with an authoritative source and correct errors.
RehearseUse imagery or self-hypnosis to access the verified structure calmly.
RetestMeasure unaided accuracy after a delay and in a new context.

Hypnosis may help deploy verified knowledge by reducing anxiety. It cannot replace encoding, correction, spacing, practice or expertise.

11 · Voluntary self-practice

The FOCUS protocol: a brief, testable self-hypnosis session

Use this routine for ordinary goals such as beginning study, rehearsing coping or reducing distress around a familiar symptom. It cannot recover memories, diagnose illness or replace care.

F · FormChoose one specific goal and one outcome you can observe.
O · OrientSit safely, notice the room, then narrow attention gently.
C · CreateUse a credible, consented suggestion rather than an absolute command.
U · UseImagine the real cue and rehearse the chosen response.
S · StopCancel what is unhelpful, reorient fully and record the result.

Eight to ten minutes, step by step

  1. Prepare. Practise somewhere safe—not while driving, bathing or supervising a hazard.
  2. Name one target. Choose a concrete behaviour rather than “unlock my full brain.”
  3. Take a baseline. Rate anxiety, pain unpleasantness or urge intensity from 0 to 10.
  4. Orient. Notice the room and bodily support; close the eyes only when comfortable.
  5. Narrow attention. Count from five to one while noticing one physical detail at each count.
  6. Suggest flexibly. Use credible words such as “may,” “can” and “increasingly.”
  7. Rehearse. Imagine the difficult cue and the smallest useful next action.
  8. Add a reminder. Link the response to a harmless cue such as both feet on the floor.
  9. Reorient fully. Count up, open the eyes, move and confirm ordinary alertness.
  10. Test. Repeat the rating and observe actual behaviour; keep the method only when benefit exceeds cost.

Before study

“I can begin with one accurate step. When attention wanders, noticing is the cue to return.”

For familiar pain

“The edges may soften while I protect the body and choose the next safe action. Comfort need not hide useful information.”

For a habit cue

“When the cue appears, I pause, name what I need and perform my prepared alternative. An urge is not an order.”

Do not intensify practice to force an unusual state

Stop and reorient if practice increases panic, derealization, confusion, agitation, insomnia or impaired functioning. Repeated distress calls for appropriately qualified help—not harder forcing.

12 · Consent before technique

Ethics, practitioner selection and the boundary against manipulation

Hypnosis can heighten trust, absorption and experiential vividness. Those features make ethical discipline more—not less—important.

Transparent influence

  • Explain the goal, procedure, evidence limits and alternatives before induction.
  • Ask permission for the category of suggestion, touch, recording and any disclosure.
  • Use language that can be questioned, modified or refused.
  • Separate therapeutic benefit from loyalty to the practitioner or group.
  • Provide a clear stop signal and honour it immediately.

Hidden control

  • Disguising persuasion as treatment or claiming “covert hypnosis.”
  • Pressuring disclosure while the person is absorbed or emotional.
  • Planting a preferred memory, belief, purchase, relationship or political conclusion.
  • Interpreting disagreement as pathology, resistance or proof that the method is working.
  • Creating secrecy, dependence, fear or exclusive access to “truth.”

The International Society of Hypnosis requires practice within professional competence and high clinical, teaching and research standards.26 Its training policy stresses that hypnosis expertise does not qualify someone to treat every disorder; the practitioner should already be trained for the condition addressed.27

Questions to ask a practitioner

  • What is your underlying healthcare qualification, licence and scope of practice?
  • What hypnosis training did you complete, and who recognizes it?
  • What exact outcome are we targeting, and how will we measure it?
  • What are the evidence, alternatives, costs and realistic limits?
  • How do you handle adverse reactions, memory uncertainty and coordination with other care?
  • Can I pause, refuse a suggestion, keep my eyes open and end the session?
  • What is the plan if nothing improves after an agreed number of sessions?
Signals of competent care and signals to leave
More reassuring Concerning
Specific, conditional claims tied to a defined condition and comparison. Guaranteed cures, permanent reprogramming or one-session certainty.
Works alongside appropriate medical or psychological assessment. Discourages medication, diagnosis or contact with other professionals.
Welcomes questions and documents consent and boundaries. Uses status, mystery, touch, humiliation or urgency to prevent reflection.
Treats memory as fallible and avoids leading narratives. Promises recovered memories, past-life proof or forensic truth.
Builds self-management and an exit plan. Claims only the practitioner can remove a suggestion or keep the client safe.

Stage hypnosis and entertainment

Stage shows recruit willing volunteers, select responsive participants and reward conspicuous behaviour under strong audience expectations. This can create remarkable experiences without remote control. Entertainment still requires consent, withdrawal rights, dignity and care with recordings that may persist online.

Apps and recordings

Audio can standardize practice, but a polished voice is not evidence. A review found hypnosis apps commonly lacked transparent evidence and professional involvement.28 Check authorship, claims, privacy, stopping instructions and evidence for the exact product.

13 · Minds are not raw material

Intelligence, originality and the right to unprogrammed attention

Suggestion can influence the conditions under which thought occurs. It does not manufacture accumulated knowledge, rare reasoning ability or wisdom.

Support deployment, not false upgrading

Reduced anxiety or pain interference may let a person use abilities already developed. That is valuable, but it is not a universal IQ increase or a shortcut around education, practice and development.

General intelligence supports learning, abstraction and unfamiliar problem-solving; expertise adds organized knowledge and wisdom adds values and correction. Hypnosis can support narrow performance, not make these achievements interchangeable.

Protect the unfinished thought

Continuously directed attention has an opportunity cost. Original questions often need quiet and ambiguity. Chosen hypnosis may be one focused exercise; it should not become a culture in which a teacher, partner or employer scripts the person’s inner life.

An insight remains a hypothesis after hypnosis

Absorption can make an idea feel coherent and certain. Record it, return to ordinary alertness, inspect assumptions and test it against evidence.

14 · Clear away the theatre

Myths worth retiring

The subject becomes more interesting—not less—when dramatic folklore is replaced by accurate questions.

“Hypnosis is sleep.”Participants are often alert and responsive. Sleepiness may occur, but it is neither necessary nor the defining mechanism.
“The hypnotist controls the mind.”Suggestion can influence experience, while values, context and ordinary social pressure still matter. Ethical consent cannot be replaced by the slogan that control is impossible.
“Only weak or unintelligent people respond.”Hypnotizability is a specific individual difference, not a measure of intelligence, strength, honesty or worth.
“Deep trance guarantees a better outcome.”Felt depth, responsiveness and clinical improvement are related imperfectly. The relevant outcome must be measured directly.
“A brain scan proves hypnosis is a special state.”Imaging shows task-dependent neural changes; no scan establishes one universal trance or reveals surrender.
“Hypnosis is just placebo, so it is not real.”Expectation and context are biologically real components of many treatments. The correct question is whether a protocol adds useful benefit beyond an appropriate comparison.
“Hypnosis can recover exact memories.”It can increase output, vividness and confidence without increasing accuracy—and may foster false recollection.
“One session permanently removes a habit.”Durable change usually depends on motivation, repetition, environment, physiology, support and relapse planning.
“If pain falls, the medical problem is solved.”Experience can improve while an underlying condition still requires diagnosis, protection or treatment.
“Natural talent is all that matters.”Responsiveness varies, but wording, practice, fit, trust and the target behaviour can be adapted. A screening score is guidance, not fate.
15 · The whole picture

Hypnosis is disciplined suggestion—not surrender

Attention, expectation, imagery and learning can alter pain, effort, movement and emotion. Evidence supports hypnosis as a possible adjunct in selected pain, procedure, anxiety and brain–gut contexts. Effects vary, active treatments often perform similarly, and broad promises about habits, learning or permanent change exceed the data.

The same responsiveness that makes a therapeutic suggestion vivid can make a leading question convincing. Mature practice therefore centres memory accuracy, competence, consent and the right to stop.

Used ethically, hypnosis offers another way to rehearse a chosen response—then returns the result to ordinary life, where evidence, autonomy and consequences decide its value.

Evidence library

Sources and further reading

Definitions, theory, neurobiology, systematic reviews, trials and professional standards supporting this guide.

  1. Elkins, Barabasz, Council & Spiegel. Advancing research and practice: The revised APA Division 30 definition of hypnosis (2015).
  2. Halligan & Oakley. Hypnosis and beyond: Exploring the broader domain of suggestion (2014).
  3. Martin & Pacherie. Alterations of agency in hypnosis: A new predictive coding model (2019).
  4. Zahedi, Lynn & Sommer. How hypnotic suggestions work—A systematic review of prominent theories of hypnosis (2024).
  5. Landry, Lifshitz & Raz. Brain correlates of hypnosis: A systematic review and meta-analytic exploration (2017).
  6. De Pascalis. Brain functional correlates of resting hypnosis and hypnotizability: A review (2024).
  7. Zimmerman et al. A general factor of hypnotizability revealed by confirmatory factor analysis (2025).
  8. Montgomery, Schnur & David. The impact of hypnotic suggestibility in clinical care settings (2011).
  9. Rosendahl, Alldredge & Haddenhorst. Meta-analytic evidence on the efficacy of hypnosis for mental and somatic health issues (2024).
  10. Yim & Derbyshire. A systematic review of hypnosis for clinical pain relief (2026).
  11. Jones et al. Adjunctive use of hypnosis for clinical pain: A systematic review and meta-analysis (2024).
  12. Walter et al. Hypnosis as a non-pharmacological intervention for invasive medical procedures: A systematic review and meta-analytic update (2025).
  13. Thompson et al. The effectiveness of hypnosis for pain relief: A systematic review and meta-analysis of 85 controlled experimental trials (2019).
  14. Langlois et al. Hypnosis to manage musculoskeletal and neuropathic chronic pain: A systematic review and meta-analysis (2022).
  15. Adler et al. Gut-directed hypnotherapy for irritable bowel syndrome: A systematic review and meta-analysis (2025).
  16. Valentine, Milling, Clark & Moriarty. The efficacy of hypnosis as a treatment for anxiety: A meta-analysis (2019).
  17. Ramondo, Gignac & Pestell. Clinical hypnosis as an adjunct to cognitive behavior therapy: An updated meta-analysis (2021).
  18. Eason & Parris. Clinical applications of self-hypnosis: A systematic review and meta-analysis of randomized controlled trials (2019).
  19. Barnes, McRobbie, Dong, Walker & Hartmann-Boyce. Hypnotherapy for smoking cessation (Cochrane Review, 2019).
  20. Batra et al. Hypnotherapy compared to cognitive-behavioral therapy for smoking cessation: A randomized controlled non-inferiority trial (2024).
  21. Bo et al. Effects of self-conditioning techniques (self-hypnosis) in promoting weight loss in patients with severe obesity: A randomized controlled trial (2018).
  22. Delestre et al. Hypnosis reduces food impulsivity in patients with obesity and high food impulsivity: The HYPNODIET randomized controlled clinical trial (2022).
  23. Pachaiappan, Tee & Low. Hypnosis interventions for reducing test anxiety in students: A systematic review (2023).
  24. Schmidt et al. Post-hypnotic suggestion improves confidence and speed of memory access with long-lasting effects (2024).
  25. Leo, Bruno & Proietti. Remembering what did not happen: The role of hypnosis in memory recall and false memories formation (2025).
  26. International Society of Hypnosis. Code of Ethics (revised 2018).
  27. International Society of Hypnosis. Training policy for clinical hypnosis (accessed 2026).
  28. Sucala et al. Hypnosis—There’s an app for that: A systematic review of hypnosis apps (2013).

Educational note: This article explains general evidence and safe principles. It does not diagnose symptoms, authenticate memories, replace anaesthesia or prescribe treatment. New or severe pain, neurological change, significant psychiatric symptoms or impaired functioning requires assessment appropriate to the situation.

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