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Adapting a Robot's Linguistic Style Based on Socially-Aware Reinforcement Learning

Hannes Ritschel, Tobias Baur, Elisabeth André


Proceedings of the 2017 26th IEEE International Symposium on Robot and Human Interactive Communication (RO-MAN)

Verlag: IEEE

DOI: DOI


When looking at Socially Interactive Robots, adaptation to the user's preferences plays an important role in today's Human-Robot Interaction to keep interaction interesting and engaging over a long period of time. Findings indicate an increase in user engagement for robots with adaptive behavior and personality, but also that it depends on the task context whether a similar or opposing robot personality is preferred. We present an approach based on Reinforcement Learning, which gets its reward directly from social signals in real-time during the interaction, to quickly learn about and dynamically address individual human preferences. Our scenario involves a Reeti robot in the role of a story teller talking about the main characters in the novel “Alice's Adventures in Wonderland” by generating descriptions with varying degree of introversion/extraversion. After initial simulation results, an interactive prototype is presented which allows to explore the learning process adapting to the human interaction partner's engagement.