Interactive drama is more than just a new breed of entertainment software. As different research projects have shown, these systems can also be used for pedagogical and therapeutic purposes. The goal of these systems is to teach sophisticated problem solving skills by allowing the user to interact with compelling stories that have didactic purpose.One of the main attractions of narratives, independent of the medium in which they are presented, is that they elicit emotional response in their audiences. They have an affective impact and only engineers and authors who understand how the emotion...