Behavior Models of Emotion-Featured Robots: A Survey

Emotions are important in many aspects of human behavior. Emotions are displayed on human faces, they are reflected in human memory, and they even influence human intelligence. The creation of robots that try to mimic humans arises the question of how the concept of emotion can be transferred to robots. There is no unique answer to the question, however many robots that leverage emotions exist. By summarizing the work done on these robots we try to enlighten the relations between robots and emotions from several perspectives. We first identify how artificial emotion can be defined in a robotic system. Next, we investigate the possible roles of emotions in robotic behavior models and analyze different implementations of the concept of emotion in these models. Finally, we elaborate on the evaluation of how emotions influence human-robot interaction. For this purpose, we qualitatively analyzed a selected set of robots that include emotions in their model. Considering the diversity of state-of-the-art approaches to using emotions in robots, we try to present the findings in a structured and comprehensive way that could be valuable for future researchers.