Hypnotic Suggestibility FAQ
Hypnotic suggestibility describes how readily a person responds to suggestions during hypnosis. It is relevant to hypnosis research and practice, but it is not a simple measure of intelligence, willpower, gullibility, or personal worth. People differ in how they respond, and a person’s response can also vary depending on the situation, the wording of the suggestion, their expectations, motivation, attention, and the relationship with the practitioner.
What is hypnotic suggestibility?
Hypnotic suggestibility is the degree to which a person experiences changes in thoughts, feelings, sensations, perceptions, or behavior in response to suggestions given during hypnosis.
For example, a person may respond to a suggestion by:
Feeling that one arm is becoming lighter
Experiencing reduced discomfort
Noticing a change in temperature or bodily sensation
Imagining a particular scene more vividly
Finding that a previously automatic response, such as opening the eyes, temporarily feels difficult
Experiencing a suggested memory, image, or emotion more strongly
In scientific research, suggestibility is usually assessed through standardized procedures. These often include suggestions for involuntary or automatic-seeming responses, such as hand levitation, arm heaviness, or temporary limb rigidity. Researchers then score the person’s responses according to predefined criteria.
Hypnotic suggestibility is best understood as an interaction among several factors, including:
Attention — the ability to focus on the practitioner’s words or on an internal experience
Imagination and mental absorption — the ability to become engaged in images, sensations, or ideas
Expectations — beliefs about what hypnosis will feel like and what is likely to happen
Motivation and cooperation — willingness to participate in the exercise
Context and rapport — the perceived safety, credibility, and quality of communication
The wording of the suggestion — suggestions work better when they are clear, relevant, and suited to the individual
A person does not have to lose consciousness or surrender control to respond to hypnosis. Most people remain aware of what is happening and can reject suggestions that conflict with their values or boundaries. Hypnotic responses are generally experiences the person participates in, rather than something imposed against their will.
Suggestibility is also not completely fixed. A person may respond differently on different days or with different practitioners, procedures, goals, and levels of interest. Standardized tests measure responses under particular conditions; they do not define a person’s overall capacity for hypnosis.
What percentage of people are highly hypnotizable?
Research commonly finds that approximately 10% to 15% of adults score in the highly hypnotizable range, while a similar proportion scores relatively low. Most people—roughly 70% to 80%—show moderate levels of response.
The exact percentages vary because researchers use different tests, scoring rules, samples, and definitions of “high hypnotizability.” Some studies divide participants into broad categories, while others treat hypnotic responsiveness as a continuous range rather than as three separate groups.
A commonly reported pattern is:
About 10% to 15%: high responsiveness
About 70% to 80%: moderate responsiveness
About 10% to 15%: low responsiveness
These figures should be interpreted carefully:
A lower score does not mean hypnosis is impossible or useless.
A high score does not guarantee success with every therapeutic goal.
A person’s response on a laboratory scale may not predict every response in clinical hypnosis.
Therapeutic outcomes depend on more than suggestibility, including the treatment method, the problem being addressed, expectations, motivation, and the quality of the working relationship.
Hypnotic responsiveness may be relatively stable for some people, but it is not perfectly unchangeable.
A person with a moderate or low response on a formal test may still benefit from hypnotherapy techniques such as relaxation, focused attention, imagery, coping rehearsal, pain-management strategies, and self-hypnosis. Clinical work should therefore focus on the person’s goals rather than on labeling them as “good” or “bad” at hypnosis.
What suggestibility tests are used for in hypnotherapy?
Suggestibility tests can serve several purposes:
To introduce a client to focused attention and hypnotic responding
To identify the kinds of suggestions that feel natural to the client
To adapt language and imagery to the client’s preferences
To establish realistic expectations
To provide a baseline in research or training
To help a practitioner assess how directly or indirectly to phrase suggestions
In clinical practice, these exercises should not be treated as pass-or-fail examinations. A skilled practitioner uses them as communication and assessment tools, not as a way to judge the client.
Common formal scales
Stanford Hypnotic Susceptibility Scales
The Stanford Hypnotic Susceptibility Scale, Form A and Form B are structured measures that typically include a standardized induction followed by several suggestions. The Stanford Hypnotic Susceptibility Scale, Form C is longer and more demanding, with suggestions designed to assess a broader range of responses.
These scales are primarily research and assessment instruments. Administration and scoring should follow the appropriate manual and training requirements.
Harvard Group Scale of Hypnotic Susceptibility
The Harvard Group Scale of Hypnotic Susceptibility, Form A is designed for group administration. Participants receive standardized instructions and then complete a series of hypnotic suggestions. It is often used in research because many people can be assessed under similar conditions.
Waterloo–Stanford Group Scale of Hypnotic Susceptibility
The Waterloo–Stanford Group Scale is another group-administered measure based on standardized hypnotic procedures. It is used mainly in research and educational settings.
Informal clinical exercises
Practitioners may also use brief, nonstandardized exercises, such as:
Hand-clasp or finger-lock suggestion: The client imagines the fingers becoming comfortably joined or difficult to separate until instructed.
Arm heaviness or lightness: The client focuses on sensations suggesting that an arm is becoming heavier or lighter.
Hand levitation: The client notices whether one hand seems to rise as attention is directed toward lightness or upward movement.
Magnetic hands: The client imagines the hands being gently drawn together or pushed apart.
Eye-closure suggestion: The client focuses on the increasing comfort and heaviness of the eyelids.
These exercises can be useful demonstrations, but they are not equivalent to a validated hypnotizability scale. The result may reflect many influences, including understanding, curiosity, expectations, physical comfort, anxiety, the practitioner’s wording, and the client’s decision to participate.
A responsible practitioner should explain the purpose of any exercise, obtain consent, avoid embarrassment, and never present the outcome as a diagnosis or a measure of intelligence, character, or personal control.
Can you provide some examples of hypnotic suggestions?
Yes. Suggestions should be specific, respectful, and connected to the client’s goals. In hypnotherapy, suggestions are often framed as invitations to notice or practice a useful response rather than as demands.
Relaxation and calm
“As you continue breathing comfortably, you may notice your shoulders beginning to loosen.”
“With each easy exhalation, you can allow your body to settle at its own pace.”
“You may find it easier to notice a sense of steadiness developing.”
“Whenever you want to pause during the day, one slow breath can remind your body how to soften.”
Focus and concentration
“For the next few minutes, you can allow your attention to remain with the task in front of you.”
“Distractions may become reminders to return gently to what matters.”
“You can notice the difference between an important thought and background mental noise.”
“Each time you begin, the first small step can become easier to take.”
Confidence and performance
“You can remember a time when you handled a challenge effectively and allow that sense of capability to become more familiar.”
“Before the presentation, you may notice your breathing becoming steadier and your attention becoming clearer.”
“You can speak one sentence at a time, allowing your preparation to support you.”
“Confidence can be a quiet willingness to proceed, even when some nervousness is present.”
Managing stress
“When you notice stress building, you can recognize it earlier and choose a response that supports you.”
“A slow breath can create a brief space between a trigger and your next action.”
“You can practice releasing tension from areas that do not need to work so hard.”
“As you become aware of pressure, you can return attention to what is within your control.”
Pain management
Pain suggestions should be individualized and used as part of appropriate medical care—not as a substitute for evaluation or treatment.
“You may notice that the area can feel more comfortable, supported, or distant from your attention.”
“The sensation may become less intense, less unpleasant, or easier to manage.”
“You can shift attention toward a neutral or comfortable area of the body.”
“You may discover that moments of comfort can last a little longer.”
Sleep support
Hypnotherapy suggestions for sleep should not imply that a person must force sleep. A more useful approach is often to reduce effort and support a consistent routine.
“As you prepare for bed, you can allow the day’s activity to become less important.”
“Your body can learn the familiar sequence that signals it is time to rest.”
“If thoughts arise, you can notice them and return gently to your breathing or another quiet focus.”
“You can give yourself permission to rest without needing to make sleep happen.”
Habit change
“You can notice the earliest signal that the old habit is beginning.”
“At that moment, you may remember the choice you want to make and allow a brief pause.”
“Each time you choose the healthier response, you strengthen that pattern.”
“A lapse can become information rather than a reason to give up.”
Self-hypnosis
“You can use this breathing pattern as a cue to return to a calmer state.”
“With practice, a few minutes of focused attention may become enough to begin.”
“You remain able to open your eyes, move, and stop whenever you choose.”
“You can select the suggestions that are useful and set aside anything that does not fit.”
Effective suggestions are not magic phrases. They work best when they are realistic, personally meaningful, and practiced in a setting where the client feels safe and respected. Suggestions should never be used to encourage illegal behavior, override consent, create false memories, or replace medical or mental-health care when that care is needed.
Sources
Weitzenhoffer, A. M., and E. R. Hilgard. Stanford Hypnotic Susceptibility Scale, Forms A and B. Consulting Psychologists Press, 1959.
Weitzenhoffer, A. M., and E. R. Hilgard. Stanford Hypnotic Susceptibility Scale, Form C. Consulting Psychologists Press, 1962.
Shor, R. E., and E. Orne. The Harvard Group Scale of Hypnotic Susceptibility, Form A. Consulting Psychologists Press, 1962.
Hilgard, E. R. Divided Consciousness: Multiple Controls in Human Thought and Action. Wiley, 1977.
Kihlstrom, J. F. “The Psychological Unconscious.” In The Handbook of Social Psychology, edited by D. T. Gilbert, S. T. Fiske, and G. Lindzey, McGraw-Hill, 1998.
Green, J. P., and S. A. Lynn. “Hypnotic Responsiveness: Expectancy, Hypnosis, and Hypnotic Suggestibility.” International Journal of Clinical and Experimental Hypnosis, vol. 53, no. 1, 2005, pp. 3–26.
American Psychological Association, Division 30. “Definition and Description of Hypnosis.” American Journal of Clinical Hypnosis, vol. 48, no. 2–3, 2005, pp. 111–126.