Why Some People Are More Suggestible Than Others: The Science of Hypnotic Responsiveness

 Introduction

Anyone who has watched two people go through the same hypnotic induction and come out with wildly different experiences has witnessed a real, well-documented phenomenon. Hypnotic responsiveness, the degree to which someone enters trance and responds to suggestion, varies substantially between individuals. This is not about willingness, intelligence, or gullibility, all common misconceptions. The research points to measurable differences in brain structure, brain activity patterns, and electrical oscillation that predict who responds more readily and how deeply. 

Brain Structure Predicts Responsiveness

Research into the structural and functional cerebral correlates of hypnotic suggestibility, conducted by Huber, Lui, Duzzi, Pagnoni, and Porro (2014) and published in PLOS One, found something genuinely striking: a person's level of hypnotic suggestibility correlates directly with grey matter volume in specific cortical regions, including portions of the frontal gyri, and with the functional connectivity, during ordinary resting state, of brain networks involved in imagery and self-monitoring (Huber et al., 2014). This was the first study to demonstrate a direct structural link between brain anatomy and hypnotic capacity, rather than relying solely on behavioural measures. An earlier study by Hoeft and colleagues (2012), published in Archives of General Psychiatry, had found related functional connectivity differences between highly and less hypnotizable individuals at rest, though that study found these particular functional differences were not explained by differences in brain structure in the same regions (Hoeft et al., 2012). 

This finding reframes hypnotic responsiveness as having a genuine neurobiological basis, not simply a personality quirk or a matter of how much someone wants to be hypnotised.  

Brain Wave Patterns and Trance Depth

A separate and substantial body of research has examined the role of specific brain wave frequencies, particularly theta waves, in hypnotic responsiveness. Multiple studies have found that highly hypnotizable individuals demonstrate higher baseline theta activity, even before any hypnotic induction begins, compared to those with low hypnotizability, and that highly hypnotizable people tend to show further increases in theta power once induction begins (cited in Scientific Reports and PMC-indexed neuroscience research on hypnosis and brain oscillations). 

Theta waves are associated with focused attention, considered a critical underlying component of the hypnotic state. A study examining baseline brain activity and response to neuromodulatory pain treatments, conducted with individuals with spinal cord injury and chronic pain, found that greater baseline theta power predicted stronger pain reduction in response to hypnosis specifically, while lower baseline alpha power predicted better response to meditation, suggesting that different baseline brain states favour different interventions (cited in PubMed-indexed neuromodulatory pain treatment research, 2014). It is worth noting honestly that this area of research has produced some inconsistent findings across different studies; not every study has found the same theta relationship, and the overall picture, while promising, is not yet fully settled.  

Why This Matters in Practice

Understanding that responsiveness has a genuine neurological basis changes how a skilled practitioner should think about a session. A person who does not respond quickly to a standard induction is not being difficult, resistant, or a poor hypnotic subject in some character sense. Their brain may simply have a different baseline pattern of activity, one that may respond better to a different pacing, induction style, or amount of repeated practice. 

This is consistent with the clinical observation, echoed by Gary Elkins of Baylor University, that almost anyone can benefit from hypnosis to some degree, even if people higher on the responsiveness spectrum respond more quickly (Elkins, cited in American Psychological Association, 2024). The goal of a skilled practitioner is not to find only the most naturally suggestible clients, but to adapt the induction and approach to whatever baseline a given nervous system presents. 

Conclusion

Hypnotic responsiveness varies because brains genuinely differ, in measurable, structural, and electrophysiological ways. This is not a character judgement or a test someone passes or fails. It is a documented spectrum of neurobiological difference, one that research is still actively working to map with full precision. Knowing where you sit on that spectrum is useful information for tailoring the right approach, not a verdict on whether trance work is available to you. 

Discover Your Own Responsiveness 

Every nervous system responds differently to hypnotic induction, and a skilled practitioner adapts to that rather than expecting a uniform response. A session with David begins by understanding your specific responsiveness and working with it directly. 

Book a session at davidmarius.com

References 

Huber, A., Lui, F., Duzzi, D., Pagnoni, G., & Porro, C. A. (2014). Structural and functional cerebral correlates of hypnotic suggestibility.. PLOS One, 9(3), e93187. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3966870/ 

Hoeft, F., Gabrieli, J. D. E., Whitfield-Gabrieli, S., Haas, B. W., Bammer, R., et al. (2012). Functional brain basis of hypnotizability.. Archives of General Psychiatry, 69(10), 1064-1072. https://escholarship.org/uc/item/6nd8p7bw 

Jensen, M. P., et al. (2015). Gamma power and beta envelope correlation are potential neural predictors of deep hypnosis (related theta/gamma hypnosis oscillation research).. Scientific Reports / PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC10943225/ 

American Psychological Association. (2024). Uncovering the new science of clinical hypnosis.. Monitor on Psychology. https://www.apa.org/monitor/2024/04/science-of-hypnosis