dr Alfred Barrios Phd research on effectiveness of various methods of therapy.

presented a review many years ago in the journal, "Psychotherapy: Theory, Research and Practice (1970)" and also published in American Health magazine.
He gave the following recovery rates:

• Hypnotherapy was 93% after an average of 6 sessions.
• Psychoanalysis was 38% success rate after an average of 600 sessions.
• Behavior Therapy was 72% after 22 sessions.
  

A copy of this entire article, entitled "Hypnotherapy: A Reappraisal", can be found at his website, http://www.stresscards.com/ , in the articles section.