Abstract
This paper describes an interactive storytelling system, accessible through the SoftBank robotic platforms NAO and Pepper. The main contribution consists of the interpretation of the story characters by humanoid robots, obtained through the definition of appropriate cognitive models, relying on the ACT-R cognitive architecture. The reasoning processes leading to the story evolution are based on the represented knowledge and the suggestions of the listener in critical points of the story. They are disclosed during the narration, to make clear the dynamics of the story and the feelings of the characters. We analyzed the impact of such externalization of the internal status of the characters to set the basis for future experimentation with primary school children.
Highlights
Storytelling is an art whose ultimate goal is to touch the listener and completely engage him in an emotional journey
A story character modeling was performed by using the ACT-R cognitive architecture
The storytelling process is performed by NarRob, a robotic interactive storytelling system
Summary
Storytelling is an art whose ultimate goal is to touch the listener and completely engage him in an emotional journey. A social storytelling robot was implemented in [15]; the robot uses a persuasion model, based on a categorization of humans Personality Traits (PTs), to convince the player to choose the best action to perform within the plot Another example that focuses attention on the use of a robot in storytelling is reported in [16,17], in which it was demonstrated how the use of a Softbank Robotics NAO with human social behaviors can help pre-school children to better memorize the details of a story. The system allows the player to influence the actions of the characters, who remodel their objectives according to the choices made by the player To obtain such a kind of storytelling activity, we implemented the characters of the story as autonomous cognitive agents whose behavior was modeled exploiting a cognitive architecture. An evaluation section discusses the impact of the externalization of the character’s internal status on the story listeners, and a concluding discussion is reported
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