The vast majority of support groups are classified as 12-Step programs. These programs generally break down recovery into steps that all members are expected to follow. 12-Step programs are modeled after Alcoholics Anonymous, by far the best known and most widely attended substance abuse group in the world. While Alcoholics Anonymous in particular and 12-step programs in general are the most popular support groups, many others are available for individuals who feel a different approach would work best for them. Although it is difficult to accurately gauge the success rate of individual groups, studies have shown that regularly attending a support group substantially increases the likelihood that a recovery alcoholic will remain sober.