W.: Mixed-Initiative Interaction between Pedagogical Agents and Students in Virtual Environments

Virtual reality can broaden the types of interaction between students and computer tutors. As in con-ventional simulation-based training, the computer can watch students practice tasks, responding to questions and offering advice. However, immersive virtual envi-ronments also allow the computer tutor to physically inhabit the virtual world with the student. Such a "pedagogical agent " can physically collaborate with the student on tasks and employ the sorts of nonver-bal communication used by human tutors. This paper describes Steve, a pedagogical agent for virtual envi-ronments that helps students learn procedural tasks. Steve inhabits the virtual world with students, and he collaborates with them on tasks by gracefully shifting between demonstrating the task and providing assis-tance while the student performs the task. The pa-per also describes the subtle ways in which such a pedagogical agent can interact with students through nonverbal communication to achieve more human-like collaboration.