Prisoner's Dilemma
Affect Simulation with Primary and Secondary Emotions
IVA '08 Proceedings of the 8th international conference on Intelligent Virtual Agents
The effect of expression of anger and happiness in computer agents on negotiations with humans
The 10th International Conference on Autonomous Agents and Multiagent Systems - Volume 3
A computer model of the interpersonal effect of emotion displayed in a social dilemma
ACII'11 Proceedings of the 4th international conference on Affective computing and intelligent interaction - Volume Part I
Feeling and reasoning: a computational model for emotional characters
EPIA'05 Proceedings of the 12th Portuguese conference on Progress in Artificial Intelligence
The impact of emotion displays in embodied agents on emergence of cooperation with people
Presence: Teleoperators and Virtual Environments
A domain-independent framework for modeling emotion
Cognitive Systems Research
Predicting human strategic decisions using facial expressions
IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
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Research in the behavioral sciences suggests that emotion can serve important social functions and that, more than a simple manifestation of internal experience, emotion displays communicate one's beliefs, desires and intentions. In a recent study we have shown that, when engaged in the iterated prisoner's dilemma with agents that display emotion, people infer, from the emotion displays, how the agent is appraising the ongoing interaction (e.g., is the situation favorable to the agent? Does it blame me for the current state-of-affairs?). From these appraisals people, then, infer whether the agent is likely to cooperate in the future. In this paper we propose a Bayesian model that captures this social function of emotion. The model supports probabilistic predictions, from emotion displays, about how the counterpart is appraising the interaction which, in turn, lead to predictions about the counterpart's intentions. The model's parameters were learnt using data from the empirical study. Our evaluation indicated that considering emotion displays improved the model's ability to predict the counterpart's intentions, in particular, how likely it was to cooperate in a social dilemma. Using data from another empirical study where people made inferences about the counterpart's likelihood of cooperation in the absence of emotion displays, we also showed that the model could, from information about appraisals alone, make appropriate inferences about the counterpart's intentions. Overall, the paper suggests that appraisals are valuable for computational models of emotion interpretation. The relevance of these results for the design of multiagent systems where agents, human or not, can convey or recognize emotion is discussed.