Developments in robotics have advanced the development of robots that can communicate with humans. However, a few robots are only capable of stereotypic responses, and this leads to barriers in smooth communication between humans and robots. In this study, in order to represent mood congruence effects, an episodic memory retrieval method is proposed based on a robot’s emotional values that represent its internal state. In the study, impression evaluation experiments were conducted to prove the effectiveness of the proposed method.

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