“…A positive self-concept, particularly in the domain of achievement, is highly correlated with academic success in that domain, whereas self-esteem is unrelated (Marsh, 1990(Marsh, , 1993. Self-concept has been associated with happiness (Holder & Coleman, 2008;O'Rourke, Cooper, & Gray, 2012) and with academic achievement (Marsh, Byrne, & Shavelson, 1988;Marsh & Yeung, 1997a;Skaalvik & Skaalvik, 2009). Beliefs about one's academic abilities are predictive of academic achievement in those domains (Marsh et al, 2006;Marsh & Yeung, 1997a;Möller, Pohlmann, Koller, & Marsh, 2009;Skaalvik & Skaalvik, 2009) and there is evidence of a reciprocal effect of self-concept and achievement (Skaalvik & Hagtvet, 1990).…”