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Forsyth, C. M., Graesser, A., Olney, A. M., Millis, K., Walker, B., & Cai, Z. (2015). Moody Agents: Affect and Discourse During Learning in a Serious Game. In C. Conati, N. Heffernan, A. Mitrovic, & M. F. Verdejo (Eds.), Artificial Intelligence in Education (pp. 135–144). Springer International Publishing. paper