“…Nevertheless, determining a relationship between self-concept and performance is problematic, because of the difficulty in conceptualising self-concept, on the one hand, and on the other because of the reciprocal effects that occur within these relationships (Eccles, 2005), which are illustrated in the models put forward by Marsh and collaborators (Guay, Marsh, & Boivin, 2003;Marsh & Koller, 2004;Marsh, Trautwein, Ludtke, Koller, & Baumert 2005;Marsh & Craven, 2006;Marsh & O'Mara, 2008). Similarly, selfconcept and self-efficacy are closely related to other motivational variables, such as goal orientations (Spinath & Stiensmeier-Pelster, 2003), causal attributions (Piñeiro, Valle, Cabanach, Rodríguez, & Suárez, 1999) and cognitive variables such as learning strategies (Rodríguez, Cabanach, Valle, Núñez, & González, 2004;Thomas et al, 1993).…”