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Pavlik, Jr., P. I., Brawner, K., Olney, A. M., & Mitrovic, A. (2013). A review of student models used in intelligent tutoring systems. In R. Sottilare, A. Graesser, X. Hu, & H. Holden (Eds.), Design recommendations for adaptive intelligent tutoring systems: Learner modeling, Vol. 1 of Adapive Tutoring (pp. 39–68). Orlando: U.S. Army Research Laboratory.