Support groups have been shown to have a positive impact on recovery. For example, a clinical trial on the efficacy of peer support intervention for depression found it useful in reducing depression symptoms. The researchers looked at the direct effect (decrease isolation), buffering effect (reduce stressor) and mediating effect (positive role modeling) of peer support group for depression. The success of the study is astonishing because of the impact of a major depression disorder, which can lead to suicides and impair an individual ability to concentrate. A 2010 research conducted by Pfeiffer, Heisler, Piette, Rogers and Valensteinon involved 849 people who were part of a peer support group for depression highlights the cost and benefit of
