Villao Orellana , Elián José. “IQ and Non-Verbal Intelligence: An Integrative Review of the Literature”. Revista Iberoamericana de educación 9, no. 1 (January 11, 2025): 20–31. Accessed April 17, 2026. http://www.revista-iberoamericana.org/index.php/es/article/view/285.