Jason M. Harley, François Bouchet, Roger Azevedo. Measuring Learners' Co-Occurring Emotional Responses during Their Interaction with a Pedagogical Agent in MetaTutor. In Stefano A. Cerri, William J. Clancey, Giorgos Papadourakis, Kitty Panourgia, editors, Intelligent Tutoring Systems - 11th International Conference, ITS 2012, Chania, Crete, Greece, June 14-18, 2012. Proceedings. Volume 7315 of Lecture Notes in Computer Science, pages 40-45, Springer, 2012. [doi]