“…Research by Hattie et al (1997) found that outdoor education programmes with a clear focus on personal development have, on average, small to moderate positive impacts on self-esteem, self-concept and self-efficacy and that programmes without a self-development philosophy are inclined to have negligible impacts. There have been extensive studies and reviews of research on the effects of outdoor education on self-constructs (e.g., Cason & Gillis, 1994;Ewert, 1990Ewert, , 1991Gillis & Speelman, 2008;Hattie et al, 1997;Marsh et al, 1986aMarsh et al, , 1986bNeill, 2002). Meta-analytic research has shown that an outdoor experience can result in notable outcomes with respect to enhancing self-esteem and that they have particularly strong lasting effects (Cason & Gillis, 1994;Haney & Durlak, 1998;Hattie et al, 1997;Neill & Richards, 1998).…”