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“Study of the relationship between "attitude towards the usefulness of mathematics" and "mathematical self-confidence" in two Costa Rican high schools: Estudio de la relación entre la "actitud hacia la utilidad de la matemática" y la ‘autoconfianza matemática’ en dos colegios costarricenses”, RDMEI, vol. 25, no. 2, Jan. 2025, doi: 10.18845/rdmei.v25i2.7606.