“…Numerous studies suggest that wilderness and adventure based therapy is effective in treating a range of issues relevant to mental health with a variety of age groups and populations (Bedard, 2005;Clark, Marmol, Cooley, & Gathercoal, 2004;Hattie, Marsh, Neill, & Richards, 1997;Nadler & Luckner, 1992;Neill, 2003;Wilson & Lipsey, 2000) For instance, Wilson and Lipsey conducted a meta-analysis of 28 studies that utilized a control group in the evaluation of the effectiveness of wilderness challenge programs for delinquent adolescents between the ages of 10 to 18. The overall mean effect size was 0.18 for delinquency outcomes, which equals a recidivism rate of 29% for wilderness program participants and 37% for the control group.…”