Ershadi Chahardeh, S., Saadati Shamir, A., & Zabihi, R. (2022). The Effectiveness of Cognitive Empowerment Based on the Lumosity Program on Maher Crystallized Intelligence of Elementary School Boys. International Journal of Education and Cognitive Sciences, 5(5), 149-157. https://journalecs.com/index.php/ecs/article/view/187