Bridging the Awareness Gap: Socially Mediated State Externalization for Transparent Distributed Home Robots

A team of researchers has published a paper proposing a novel solution to a core problem in home robotics: the 'awareness gap.' When robots like mobile manipulators operate out of sight—fetching items from another room—users lose trust and feel a lack of control. The team's architecture uses a co-located social robot, a SoftBank Pepper, to act as a mediator. It provides real-time verbal updates and a visual progress display about the hidden actions of a worker robot, a Hello Robot Stretch 3, during object retrieval tasks.

In a controlled study with 30 participants, the system was tested against a baseline where the Stretch robot worked silently out of view. The results were striking. User attention to the task skyrocketed from 15.8% to 84.6%, and 83% of participants preferred the mediated experience. Key user experience metrics like perceived transparency, dependability, and attractiveness all saw significant improvements. Crucially, this major boost in trust and engagement was achieved without a statistically significant increase in the total task completion time, addressing a common trade-off in HRI design.

The paper, currently under review for IROS 2026, frames this 'socially mediated state externalization' as a critical architectural pattern. It demonstrates that transparency isn't just a software feature but can be a physical, distributed system property. By dedicating a simple social agent to the sole job of communication, complex multi-robot deployments can become far more understandable and trustworthy to everyday users, paving the way for more acceptable in-home automation.