Proposal for improving the reliability, validity, and impartiality of the performance evaluation, and its classification by means of the 9-box system by statistical methodology. Revista Guatemalteca de Psicología, [S. l.], v. 1, n. 1, 2025. Disponível em: https://revistasguatemala.usac.edu.gt/rgp/article/view/2443. Acesso em: 24 apr. 2026.