Abstract
In terms of communication robot, they can affect human communication through their behavior and expression; they are not just a machine but have the potential to make communication diverse. Most of the research on human-robot interaction so far focused on one-to-one interaction between humans and robots; communication robots often need to be fluent and perfect. On the other hand, we focus on the fact that our daily conversations are never perfectly conceived but contain incomplete statements in places due to the constraints of the cognitive resource. The incompleteness is often perceived as a negative phenomenon, but it also has positive power. The authors proposed an interaction design, focused on "forgetting" which is one of the incompleteness and developed the robot, Talking-Bones, that sometimes forgets words. Talking-Bones where the robot aims to communicate with humans in conversations recalling together. Talking-Bones shows encouraging behaviors by forgetting some words in a story and asking humans to help recalling the words together to continue telling the story. We conducted fieldwork to observe the interaction between children and Talking-Bones. These results illustrate how collaborative interactions are formed depending on the relationship of the children due to a forgetful robot.
