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Smoking cessation A Meta-Analytic Comparison of the Effectiveness of Smoking Cessation Methods.
http://www.ncbi.nlm.nih.gov/pubmed/1387394
http://psycnet.apa.org/journals/apl/77/4/554/

Results: They found that among of all of the techniques used, hypnosis was the most effective. They found that a single session of hypnosis was three times more effective than the nicotine gum and five times more effective then willpower alone (willpower was 6%; nicotine gum was 10% and a single hypnosis session was 30%).

Notes: The Institute of Actuaries (in the US) commissioned the largest study ever done on smoking cessation. It statistically analyzed the results of 633 smoking cessation studies involving 71,806 participants.

Journal of Applied Psychology. Vol 77(4), Aug 1992, 554-561
By: C. Viswesvaran, F. L. Schmidt, Department of Management and Organizations, University of Iowa, Iowa City 52242

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