The Power of Scripts
One study (Bolocofsky, Dwayne, and Coulthard-Morris, 1985), published in the Journal of Clinical Psychology, divided 109 people into two groups for a nine-week study. The first group was treated with changes in diet and exercise habits (the only way to lose weight) without the addition of hypnosis. The second group was given the same diet and exercise treatment and was also given hypnosis for reinforcement. After nine weeks, not surprisingly, both groups lost weight due to the changes in diet and exercise while under supervision.
However, what happened after the eight-month and two-year follow-ups might surprise you. The group members that did not have hypnosis did not lose any more weight and, in fact, most gained most of their weight back. The hypnosis group, however, continued to lose weight during both intervals, and the studies showed that far more people in the hypnosis group met their long-term weight loss goals.
