SCHLEEF BUSTAMANTE , J.; ORTIZ, M. S. An Introduction to Multilevel Modeling in Health Psychology Using R. Costa Rican Journal of Psychology, [S. l.], v. 44, n. 2, p. 1–17, 2025. DOI: 10.22544/rcps.v44i02.10. Disponível em: http://www.rcps-cr.org/openjournal/index.php/RCPs/article/view/383. Acesso em: 2 aug. 2026.