Diferencias en el autoconcepto entre alumnado con altas capacidades y . . . Eligibility Criteria Before the search, the following inclusion criteria were established: a) at least one measure of a global or specific dimension of self-concept or self-esteem would be included; b) the participants would be children, preadolescents or adolescents; c) gifted and non-gifted students would be compared or, at least, sufficient data would be reported to make these comparisons