1. Beebe, S.A., Ivy, D.K.: Explaining student learning: An emotion model (1994)
2. Kort, B., Reilly, R., Picard, R.: An affective model of interplay between emotions and learning: reengineering educational pedagogy-building a learning companion. In: IEEE International Conference on Advanced Learning Technologies, Proceedings, pp. 43–46 (2001)
3. Graham, S., Weiner, B.: Theories and principles of motivation. In: Berliner, D., Calfee, R. (eds.) Handbook of Educational Psychology, vol. 4, pp. 63–84. Macmillan, New York (1996)
4. Zimmerman, B.J.: Self-efficacy: An essential motive to learn. Contemporary Educational Psychology 25, 82–91 (2000)
5. Lepper, M.R., Woolverton, M., Mumme, D.L., Gurtner, J.L.: Technology in education. In: Motivational techniques of expert human tutors: Lessons for the design of computer-based tutors, pp. 75–105. Lawrence Erlbaum Associates, Inc., Mahwah (1993)