Zihao Chi

Since robots are often disregarded in public interactions, many studies have examined how nonverbal cues and dialogue strategies encourage users to initiate engagement. However, the impact of robot “movement” remains insufficiently investigated. This study examined the psychological effects of movement behavior on willingness to engage in dialogue in a scenario where a mobile guide robot leads people to a stationary robot. A field experiment in a shopping mall showed that guidance by a mobile robot significantly increased dialogue duration, whereas no correlation was found between moving distance and willingness to engage. These results suggest that physical commitment induced by guided movement may enhance user motivation, and that interaction designs leveraging movement behavior may be important for advancing the social implementation of interactive robots.

Mobile robots are increasingly being utilized as guides in various settings. Ensuring efficient and hospitable interactions between robots and individuals is crucial for their successful implementation. However, there is a lack of understanding regarding the specific robot behaviors that can effectively guide individuals to their destinations while providing a sense of hospitality. In this study, we investigate two robot behaviors: “vertical oscillation motion” and “looking back motion,” with the objective of identifying behaviors that can optimize efficiency and hospitality in a guide robot. The vertical oscillation motion replicates the natural up-and-down movement of the human body during walking, while the looking back motion establishes eye contact and conveys a sense of hospitality. To evaluate the effectiveness of these behaviors, we conducted experiments with actual visitors at a shopping mall. Participants were exposed to the robot's behaviors and their responses were analyzed through questionnaires and interviews. The results revealed that the looking back motion successfully conveyed the robot's hospitality, while the vertical oscillation motion instilled a sense of urgency in individuals. However, it was found that only the looking back motion effectively motivated individuals to promptly commence walking towards the robot. These findings highlight the significance of incorporating specific robot behaviors to enhance both efficiency and hospitality in guiding individuals to their destinations. By understanding the impact of these behaviors, we can develop guide robots that accommodate a larger number of individuals while increasing their satisfaction. Future research endeavors should focus on evaluating the effectiveness of these behaviors in real-world environments, ensuring their practical applicability.