Emotion Measurement in Intelligent Tutoring Systems: What, When and How to Measure

Affective or Emotion oriented computing constitutes an emerging research field that is still in its early stages. The lack of empirical results together with the complexity that attributes emotions, subjects research to a diversity of theories, models and tools. In the current paper we present a critical review of the state of the art on emotion measurement models, methods and tools and we suggest some informal rules towards their realistic use in education settings.