Porter, Tenelle, Diego Catalán Molina, Lisa Blackwell, Sylvia Roberts, Abigail Quirk, Angela Lee Duckworth, and Kali Trzesniewski. “Measuring Mastery Behaviors at Scale: The Persistence, Effort, Resilience and Challenge-Seeking Task (PERC)”. Journal of Learning Analytics 7, no. 1 (March 29, 2020): 5–18. Accessed September 10, 2024. https://learning-analytics.info/index.php/JLA/article/view/6759.