SOCRATES: from SOCial Relation to ATtitude ExpressionS

To be perceived as believable partners in human-machine interactions, virtual agents have to express adequate social attitudes. The social attitude expressed by an agent should reflect the social situation of the interaction. The agent ought to take into account its role and its social relation toward its interactants when deciding how to react in the interaction. To build such an agent able to reason about its role and relation and to adapt its social attitude, we build a model of social decision making. First, we formalize the dynamics of the social relation through a combination of goals and beliefs. Then, we design a decision making model based on the social goals and the situational goals of the agent.