Enhancing Student Competency Models for Game-Based Learning with a Hybrid Stealth Assessment Framework. - Nathan L. Henderson; Vikram Kumara; Wookhee Min; Bradford W. Mott; Ziwei Wu; Danielle Boulden; Trudi Lord; Frieda Reichsman; Chad Dorsey; Eric N. Wiebe; James C. Lester (EDM, 2020)