Keith Humphreys traces how addiction scientists came around to the idea that Alcoholics Anonymous works:
A watershed in scientist’s views of the value of AA occurred in the 1990s with Project MATCH, the largest study of alcohol dependence treatment ever undertaken. Two well-validated professionally-developed psychotherapies were evaluated head to head against “twelve-step facilitation counselling.” This counselling approach adapted AA ideas and goals into a 3-month long psychotherapist-delivered outpatient treatment protocol and also strongly encouraged involvement in community-based AA groups.
AA skeptics were confident that by putting AA up against the best professional psychotherapies in a highly rigorous study, Project MATCH would prove beyond doubt that the 12-steps were mumbo jumbo. The skeptics were humbled: Twelve-step facilitation was as effective as the best psychotherapies professionals had developed.
A subsequent randomized clinical trial eliminated the twelve-step counselling component and simply evaluated the effect of a brief, structured introduction to AA (as well as Narcotics Anonymous, if appropriate). Those connected by researchers to 12-step groups had substantially lower rates of using alcohol and other drugs over time. This proved that the groups themselves have a positive impact, even when they are not coupled with extended professionally-provided twelve-step facilitation counselling.
Previous Dish on the effectiveness of AA here, here, here, and here.
The Dish 