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Recent research has shown that virtual agents expressing empathic emotions toward users have the potential to enhance human–machine interaction. To provide empathic capabilities to a rational dialog agent, we propose a formal model of emotions based on an empirical and theoretical analysis of the users’ conditions of emotion elicitation. The emotions are(More)
Remerciements Pour commencer cette thèse, voici la traditionnelle page de remerciements, qui a nécessité plus de temps d'écriture que tout le reste du manuscrit... Tout d'abord je voudrais remercier mes rapporteurs, Yves Demazeau, John-Jules Meyer, et Catherine Pelachaud pour avoir accepté de relire mon manuscrit et pour leurs nombreux commentaires qui(More)
We propose an architecture of an embodied conversational agent that takes into account two aspects of emotions: the emotions triggered by an event (the felt emotions) and the expressed emotions (the displayed ones), which may differ in real life. In this paper, we present a formalization of emotion eliciting-events based on a model of the agent’s mental(More)
Recent research has shown that virtual agents expressing empathic emotions toward users have the potentiality to enhance human-machine interaction. To identify under which circumstances a virtual agent should express empathic emotions, we have analyzed real human-machine dialog situations that have led users to express emotion. The results of this empirical(More)
Significant features of an interactive system that makes the user view it as a user-friendly di alogue system are introduced and discussed. It is argued that it is onl when they are satisfied jointly and independently from dialogue state that they can appreciably affect the degree of system conviviality. It is also claimed that the way that the satisfaction(More)
We propose a computational model of emotions that takes into account two aspects of emotions: the emotions triggered by an event and the expressed emotions (the displayed ones), which may differ in real life. More particularly, we present a formalization of emotion eliciting-events based on a model of the agent's mental state composed of beliefs, choices,(More)
This paper proposes the formalization and implementation of user model. It is based on an interlocutor's model in natural language dialogue system. Experimental studies on interlocutor's representation and, particularly, on user's familiarization with the system were used for the results analyses. The analysis of the results has shown the more the user is(More)