Student profiles of achievement goals, goal instructions and external feedback: Their effect on mathematical task performance and affect. European Journal of Education and Psychology, [S. l.], v. 2, n. 3, p. 235–262, 2009. DOI: 10.30552/ejep.v2i3.31. Disponível em: https://revistas.uautonoma.cl/index.php/ejep/article/view/842. Acesso em: 27 jun. 2026.