Alicia Heraz Claude Frasson Predicting Learner Answers Correctness through Brainwaves Assesment and Emotional Dimensions. 49-56 2009 AIED http://dx.doi.org/10.3233/978-1-60750-028-5-49 conf/aied/2009 db/conf/aied/aied2009.html#HerazF09