Hypnosis is often described as a focused, responsive state in which a person may experience changes in attention, expectation, imagination, perception, and behavior. Researchers do not fully agree on what produces these effects, however. The central debate is whether hypnosis involves a distinctive psychological state—often called a state theory—or whether hypnotic responses can be explained through ordinary mental and social processes without proposing a special state, as non-state theories argue.
This debate is not simply about whether hypnosis “works.” Many researchers accept that hypnotic procedures can influence experience and behavior while disagreeing about the mechanisms involved.¹ The main theories differ in how they explain responsiveness, involuntary-feeling actions, changes in perception, and differences among participants.
What is the state theory of hypnosis?
State theories propose that hypnosis involves a distinctive condition of consciousness or mental functioning. In this view, hypnotic induction—such as focused attention, relaxation instructions, or imagery—helps produce a state that differs in important ways from ordinary waking awareness.
The phrase “hypnotic state” does not necessarily mean sleep, unconsciousness, or a single uniform condition. Modern state-oriented accounts may describe hypnosis as a change in attention, control, monitoring, absorption, or the organization of conscious experience. Some theorists also distinguish between the effects of the induction procedure and the effects of the suggestions that follow it.
A state theory typically makes several broad claims:
Hypnosis includes a meaningful alteration in ongoing mental processes.
This alteration helps explain why suggestions may produce unusual experiences.
Hypnotized people may respond in ways that are not adequately explained by ordinary expectations or social cooperation alone.
Hypnotic responsiveness may involve changes in attention, monitoring, or the experience of agency.
Some state theorists have proposed that hypnosis involves altered brain activity or changes in the way information is processed. Neuroimaging research has reported differences associated with hypnotic suggestion, but such findings do not by themselves establish one unique “hypnotic state.” Similar changes in attention, imagery, expectation, and task engagement can occur in other circumstances.²
What is the non-state theory of hypnosis?
Non-state theories argue that hypnosis does not require a special or qualitatively different state of consciousness. Instead, hypnotic responses may result from the interaction of ordinary psychological processes, including:
expectations about hypnosis;
beliefs about one’s ability to respond;
motivation and goals;
attention and imagination;
interpretation of the hypnotist’s instructions;
willingness to participate;
social context; and
learned patterns of responding.
This position does not imply that people are pretending. A person may experience a suggested movement, sensation, or image as genuine while the response is being shaped by expectations, attention, interpretation, and imagination. Non-state theories therefore distinguish between deliberate faking and psychologically mediated responding.
The non-state approach also emphasizes that behavior can feel involuntary without being caused by a separate mental state. People routinely experience actions as happening with little conscious effort—for example, when they become absorbed in a task or respond automatically to a familiar cue. From this perspective, hypnotic suggestions may organize ordinary mental processes in an unusual but understandable way.
What is the sociocognitive theory?
The sociocognitive approach is one of the best-known non-state perspectives. It explains hypnotic behavior through the combined influence of social context and cognitive processes. The term “sociocognitive” reflects two connected ideas:
Social factors influence how people understand the situation and what responses they expect.
Cognitive factors such as attention, imagination, interpretation, and self-perception help produce the resulting experience.
According to this approach, people who respond strongly to hypnosis may not simply be following instructions mechanically. They may be using imagery, concentrating on the suggested experience, interpreting their reactions in line with the suggestions, and drawing on beliefs about what hypnosis makes possible.
The sociocognitive view also highlights the role of the hypnotic situation. The language used by the hypnotist, the participant’s expectations, the setting, and the perceived legitimacy of the procedure can all affect responding. In this account, hypnosis is a social interaction that can guide attention and meaning while mobilizing ordinary psychological capacities.³
What is the response-expectancy theory?
Response-expectancy theory focuses on expectations about what will happen. If people expect a suggested response to occur, that expectation may influence attention, interpretation, bodily reactions, and behavior. The resulting experience can then strengthen the original expectation.
For example, a person who expects an arm to feel light may focus on sensations associated with lightness, notice small upward movements, and interpret those movements as evidence that the suggestion is taking effect. This does not require conscious deception. The response may develop through an interaction among expectation, attention, imagination, and bodily feedback.
Response expectancy is not necessarily the whole explanation of hypnosis. Expectations can influence many psychological experiences, but they do not explain every finding by themselves. The theory is best understood as an account of one important mechanism within broader cognitive and social models.⁴
What is the dissociated-control theory?
Dissociated-control theories are generally associated with state-oriented explanations, although they do not all make identical claims. The best-known version is the neodissociation theory, developed by Ernest R. Hilgard.
Hilgard proposed that hypnosis can involve a division or dissociation within systems that ordinarily coordinate conscious control. On this account, a person may carry out a suggested action while experiencing it as involuntary because information about the action or its control is not fully available to ordinary conscious awareness. The theory also introduced the idea of a “hidden observer” in some hypnotic analgesia experiments.
The dissociated-control view attempts to explain why people may report that an action happened automatically even though the action appears organized and purposeful. It also aims to explain hypnotic analgesia, in which suggestions may alter the experience of pain without necessarily eliminating all sensory processing.
The theory has been influential, but its interpretation remains disputed. Critics have argued that reports of divided awareness may be shaped by suggestion, demand characteristics, expectations, or the way the experiment is presented.⁵
What is the dissociated-experience theory?
Another state-oriented approach treats hypnosis as a change in the organization of conscious experience rather than simply as a change in behavior. This kind of theory emphasizes altered awareness, absorption, reduced monitoring, changes in the sense of agency, and the separation of experience from ordinary self-awareness.
From this perspective, hypnosis may make some mental events feel more automatic or less personally controlled. A person may understand that a suggestion was given yet experience the resulting movement, image, or sensation as arising without deliberate effort.
This account overlaps with dissociation but should not be reduced to the claim that hypnosis creates multiple selves or a dramatic split in personality. In most contemporary research discussions, dissociation refers more broadly to a separation among mental processes, such as attention, memory, perception, monitoring, and the experience of control.
What is the social-psychological theory of hypnosis?
Social-psychological theories explain hypnosis through the roles and expectations created by the hypnotic situation. The participant may understand the hypnotist as an authority or guide, view hypnosis as a setting in which unusual experiences are appropriate, and adopt a temporary role that encourages close attention to suggestions.
These theories do not necessarily reduce hypnosis to obedience. A participant may be cooperative yet still experience a response as involuntary. Social context can influence what a person notices, expects, attempts, and reports, while cognitive processes help produce the actual experience.
This approach also helps explain why the same person may respond differently in different settings. Rapport, wording, trust, perceived expertise, motivation, and the participant’s understanding of the task can all affect results.⁶
How do state and non-state theories explain involuntary experiences?
The experience of involuntariness is one of the most important points of disagreement.
A state theory may say that hypnosis changes monitoring or control in a way that allows an action to occur while bypassing ordinary conscious intention. The person experiences the action as automatic because control has been reorganized.
A non-state theory may say that the person’s expectation, attention, imagery, and interpretation produce an action that is not consciously planned in the usual way. Because the action is not experienced as deliberately initiated, it can feel involuntary even without a special hypnotic state.
Both perspectives take the subjective experience seriously. The disagreement concerns the explanation, not necessarily the report itself. A person can sincerely say, “My hand moved by itself,” while researchers continue to debate whether the underlying process is best described as altered state, response expectancy, imaginative involvement, social influence, or a combination of these.
How do the theories explain hypnotic analgesia?
Hypnotic analgesia refers to reduced pain experience following hypnotic procedures or suggestions. State-oriented theories may explain it through changes in the organization of consciousness, attention, monitoring, or access to pain-related information.
Non-state accounts may emphasize attention, expectation, appraisal, imagery, motivation, and the meaning assigned to pain signals. Suggestions can direct attention away from pain, alter expectations about discomfort, and encourage alternative interpretations of bodily sensations.
Research suggests that hypnotic suggestions can influence pain experience, but the size and reliability of effects vary across people and procedures. Hypnosis should not be treated as a universal replacement for medical evaluation or pain treatment. A person with new, severe, or unexplained pain should seek appropriate medical care.
Do state and non-state theories agree about anything?
Yes. The two approaches often agree on several points:
People differ in their responsiveness to hypnotic suggestions.
Suggestions work better when they are understandable and relevant to the person.
Attention, expectation, motivation, and context matter.
Hypnosis does not make everyone equally responsive.
Hypnotic responses can involve genuine changes in subjective experience.
A person’s report should not automatically be dismissed as pretending.
The major disagreement concerns the need for a special state to explain these effects. State theorists consider altered organization of consciousness or control central to hypnosis. Non-state theorists argue that ordinary processes, arranged by a distinctive social and instructional context, can explain the findings.
Is one theory proven correct?
No single theory has received universal acceptance. The debate continues because hypnosis involves several levels of explanation:
Subjective experience: What does the person feel?
Behavior: What does the person do?
Cognition: How are attention, expectation, imagery, and interpretation involved?
Social interaction: How do the hypnotist, participant, language, and setting shape the response?
Neuropsychology: What changes occur in brain activity and information processing?
A theory may explain one level better than another. For example, a social-cognitive account may clarify how expectations and instructions influence behavior, while a state-oriented account may focus more closely on altered agency or conscious experience. Some researchers therefore favor models that combine elements rather than treating state and non-state theories as completely separate categories.
It is also important to distinguish a theory from a practical description. Saying that hypnosis involves focused attention, increased responsiveness to suggestion, or changes in experience does not by itself settle the theoretical question. Those descriptions can be interpreted through different models.
What does current research suggest?
Current research supports a cautious, multifactorial view. Hypnotic responding appears to involve interactions among suggestion, attention, expectation, imagination, motivation, social context, and individual differences. Neuropsychological findings are consistent with changes in how people process suggestions and experience control, but they do not provide a simple test that divides all cases into “state” or “non-state.”²
Researchers also continue to examine whether highly responsive participants differ from others in stable traits, cognitive abilities, expectations, or patterns of brain activity. The evidence does not support a simple picture in which hypnosis is either entirely an altered state or entirely ordinary compliance.
A practical summary is:
State theories emphasize a distinctive alteration in consciousness, control, monitoring, or information processing.
Non-state theories emphasize expectations, attention, imagination, motivation, interpretation, and social context.
Sociocognitive theories explain hypnotic responses through the interaction of social roles and cognitive processes.
Dissociation theories emphasize separations among mental processes or systems of control.
Response-expectancy theories emphasize how expectations help shape experience and behavior.
Contemporary integrative views often combine several of these mechanisms rather than relying on one explanation.
Why does this debate matter?
The debate matters because theories guide research, clinical practice, and public understanding. If hypnosis is treated as a mysterious power, people may develop unrealistic fears or expectations. If it is treated as nothing more than acting, genuine experiences of altered sensation, attention, or control may be dismissed.
A balanced view recognizes that hypnosis is a structured psychological practice whose effects vary across people and situations. The state-versus-non-state debate concerns the mechanisms behind those effects. It does not need to be settled before researchers can study hypnosis carefully or before qualified professionals can use evidence-informed hypnotic procedures in appropriate settings.
What is the simplest way to remember the difference?
The simplest distinction is this:
State theories say hypnosis involves a distinctive change in mental functioning. Non-state theories say hypnotic responses can be explained through ordinary psychological and social processes organized by suggestion and context.
In practice, the most useful account may depend on the question being asked. If the question is why a person experiences an action as involuntary, one theory may emphasize altered monitoring while another emphasizes expectation and interpretation. If the question is why responses differ across settings, social and cognitive factors may be especially important.
The strongest conclusion is therefore modest but meaningful: hypnosis can influence experience and behavior, yet researchers continue to debate whether those effects require a special state. Understanding both sides helps keep discussions accurate, respectful, and free from exaggerated claims.
Notes
Michael R. Nash, “The Status of Hypnosis as an Empirically Validated Clinical Intervention,” International Journal of Clinical and Experimental Hypnosis 48, no. 2 (2000): 170–185.
David Spiegel, Peter L. Rainville, and David J. D. Kosslyn, “Hypnosis and the Brain: A New Cognitive Neuroscience Perspective,” Nature Reviews Neuroscience 2, no. 2 (2001): 123–130.
Theodore X. Barber, “Hypnosis: A Scientific Approach,” Van Nostrand Reinhold, 1969.
Nicholas P. Spanos, “A Sociocognitive Approach to Hypnotic Behavior,” in Theories of Hypnosis: Current Models and Perspectives, edited by Steven J. Lynn and Judith W. Rhue, 324–361. New York: Guilford Press, 1991.
Ernest R. Hilgard, Divided Consciousness: Multiple Controls in Human Thought and Action. New York: Wiley, 1977.
Theodore X. Barber, Nicholas P. Spanos, and John F. Chaves, Hypnosis, Imagination, and Human Potentialities. New York: Pergamon Press, 1974.