PORTER, T.; CATALÁN MOLINA, D.; BLACKWELL, L. .; ROBERTS, S.; QUIRK, A.; LEE DUCKWORTH, A.; TRZESNIEWSKI, K. Measuring Mastery Behaviors at Scale: The Persistence, Effort, Resilience and Challenge-Seeking Task (PERC). Journal of Learning Analytics, [S. l.], v. 7, n. 1, p. 5–18, 2020. DOI: 10.18608/jla.2020.71.2. Disponível em: https://learning-analytics.info/index.php/JLA/article/view/6759. Acesso em: 14 aug. 2020.