“…In general, feedback on motivation and self-esteem, related to the student's emotional state, is also encouraged in the e-learning, even when it concerns negative content such as, for example, bad students' performances (Hattie & Timperley, 2007). Tian, et al (2009) discuss an approach to identify e-learner emotion, creating patterns to find which words are associated more with emotions, abstracting, from corpus, Chinese metaphors employing sentence meaning and structure. Furthermore, the authors exploited a case based reasoning recommendation strategy to improve emotion communication between two interacting sides.…”