“…Research in the area of addiction and recovery similarly highlights the important impact of social support networks on both individuals' substance use and abstinence (e.g., see Beattie & Longabaugh, 1997;Humphreys, Mankowski, Moos, & Finney, 1999;Longabaugh, Beattie, Noel, Stout, & Malloy, 1993;Longabaugh, Wirtz, Beattie, Noel, & Stout, 1995;Longabaugh, Wirtz, Zweben, & Stout, 1998). With respect to recovery, this research has found that specific social support for abstinence (vs. general social support) is directly and positively related to maintaining abstinence (Longabaugh et al, , 1998Mohr, Averna, Kenny, & Del Boca, 2001;Rice, Longabaugh, & Stout, 1997) and that this effect is strongest when the individuals are highly invested in these supportive networks (Longabaugh et al, , 1998.…”