Clustering Students in ASSISTments: Exploring System- and School-Level Traits to Advance Personalization. - Seth Adjei; Korinn Ostrow; Erik Erickson; Neil T. Heffernan (EDM, 2017)

Exploring Gritty Students' Behavior in an Intelligent Tutoring System. - Erik Erickson; Ivon Arroyo; Beverly P. Woolf (ITS Workshops, 2018)