This study presents an empirical investigation into the design and impact of autonomous dialogues in human-robot interaction for behavior change coaching. We focus on the use of Haru, a tabletop social robot, and explore the implementation of the Tiny Habits method for fostering positive behavior change. The core of our study lies in developing a fully autonomous dialogue system that maximizes Haru's emotional expressiveness and unique personality. Our methodology involved iterative design and extensive testing of the dialogue system, ensuring it effectively embodied the principles of the Tiny Habits method while also incorporating strategies for trust-raising and trust-dampening. The effectiveness of the final version of the dialogue was evaluated in an experimental study with human participants (N=12). The results indicated a significant improvement in perceptions of Haru's liveliness, interactivity, and neutrality. Additionally, our study contributes to the broader understanding of dialogue design in social robotics, offering practical insights for future developments in the field.

翻译：本研究针对行为改变辅导中人机交互的自主对话设计及其影响进行了实证调查。我们聚焦于桌面社交机器人 Haru，探讨如何实施 Tiny Habits 方法来促进积极的行为改变。研究的核心在于开发一套完全自主的对话系统，以最大化 Haru 的情感表达能力和独特个性。我们的方法包括对对话系统进行迭代设计和广泛测试，确保其不仅有效体现 Tiny Habits 方法的原则，还融入了建立信任和降低信任的策略。最终版本对话的效果通过一项包含人类参与者（N=12）的实验研究进行了评估。结果表明，参与者对 Haru 的生动性、交互性和中立性的感知显著提升。此外，本研究为社交机器人对话设计的更广泛理解做出了贡献，为该领域的未来发展提供了实用见解。