Better to be frustrated than bored: The incidence, persistence, and impact of learners' cognitive-affective states during interactions with three different computer-based learning environments.

Ryan Shaun Joazeiro de Baker Sidney K. D'Mello Ma. Mercedes T. Rodrigo Arthur C. Graesser Better to be frustrated than bored: The incidence, persistence, and impact of learners' cognitive-affective states during interactions with three different computer-based learning environments. 223-241 2010 68 Int. J. Hum.-Comput. Stud. 4 http://dx.doi.org/10.1016/j.ijhcs.2009.12.003 db/journals/ijmms/ijmms68.html#BakerDRG10