The investigation of mechanisms of behavior change is a relatively new endeavor in the addiction treatment and recovery field. A number of mechanisms through which AA may exert its beneficial effects have been investigated. These have included investigations on negative affect (Kelly et al., 2009; Kelly et al., 2010a; Kelly et al., 2010b), spirituality (e.g., Zemore, 2007), common processes variables (e.g., motivation, coping, self-efficacy; Connors et al, 2001, Morgenstern et al, 1997; Kelly et al., 2000) and social network mechanisms (e.g., Bond et al, 2003; Kaskutas et al, 2002). Using a uniquely large clinical alcohol use disorder sample exhibiting a wide range of alcohol-related involvement and impairment as well as a lagged, prospective study design, we found that AA also seems to promote abstinence and recovery by mobilizing important changes in social processes. Most importantly by reducing exposure to and involvement with pro-drinking social ties, but also by increasing exposure to, and involvement with pro-abstinent social ties. One of the potential “downstream” mechanisms by which such changes may decrease relapse risk is by reducing or eradicating exposure to alcohol related
