I divided 120 subjects into 60 making their own recordings and 60 listening to my recording. I had another variable called locus of control: whether a person believed they were in control of their own lives and destinies and liked it that way or not, and people who believed their lives were in the control of fate, chance or other people and liked it that way or not. Of the self-hypnosis group who believed they were in control of their lives and liked it that way 50% gave up smoking completely and that group had a 75% overall reduction in consumption. All the self-hypnosis group performed better than the hetero-hypnosis group. After that I began working with the students and staff members on hypnosis scripts they could record themselves. I figured out that for difficult challenges like smoking, drinking, eating disorders and so on it was far more likely to be effective. With some problems, for example examination anxiety it worked no matter what. I never had a failure with exam nerves, whether the induction was by the student/staff member or me.
(More next time)