Two articles on mechanisms of change in AA.
The first looks at spirituality and concludes:
“Findings suggest that AA leads to better alcohol use outcomes, in part, by enhancing individuals’ spiritual practices and provides support for AA’s own emphasis on increasing spiritual practices to facilitate recovery from alcohol use disorder.”
The second at A.A. related helping and the helper therapy principal:
“Helping others in the program of AA has forged a therapy based on the kinship of common suffering, a social pioneering having a vast potential for the myriad other ills of mankind. A large body of research supports the HTP in clinical populations sharing a chronic condition beyond addiction, such as AIDS or pain. When humans help others regardless of a shared condition, they appear to live longer and happier lives.”