I don't think hypnotherapists would agree that their techniques are effective only with highly hypnotizable subjects. This is borne out by a meta-analysis of pain relief through hypnosis, published in the International Journal of Clinical and Experimental Hypnosis in 2000:
http://accurateclinic.com/wp-content/upl...s-2000.pdf
It's based on studies comparing hypnosis to no treatment or standard treatment. The authors calculated an overall effect size of 0.67, and concluded that "the average participant treated with hypnosis demonstrated greater analgesic response than 75% of participants in standard and no-treatment control groups". For a subset of the data where hypnotic suggestibility had been measured, they did find a larger effect size (1.16) in subjects with high suggestibility, but there was still a moderate effect for those with only medium suggestibility (0.64). These groups together made up nearly 90% of the total, though the authors cautioned that the numbers for which suggestibility was measured were small.
They also found no significant difference between the effectiveness of hypnosis and non-hypnotic psychological treatments, though of course lumping all the alternatives together may be questionable, just as lumping "no treatment" and "standard treatment" together as a control group may be questionable. I'd like to have a proper look at the paper. No doubt the experimental data in this area are rather scanty.
http://accurateclinic.com/wp-content/upl...s-2000.pdf
It's based on studies comparing hypnosis to no treatment or standard treatment. The authors calculated an overall effect size of 0.67, and concluded that "the average participant treated with hypnosis demonstrated greater analgesic response than 75% of participants in standard and no-treatment control groups". For a subset of the data where hypnotic suggestibility had been measured, they did find a larger effect size (1.16) in subjects with high suggestibility, but there was still a moderate effect for those with only medium suggestibility (0.64). These groups together made up nearly 90% of the total, though the authors cautioned that the numbers for which suggestibility was measured were small.
They also found no significant difference between the effectiveness of hypnosis and non-hypnotic psychological treatments, though of course lumping all the alternatives together may be questionable, just as lumping "no treatment" and "standard treatment" together as a control group may be questionable. I'd like to have a proper look at the paper. No doubt the experimental data in this area are rather scanty.