Jeff Rickel, Rajaram Ganeshan, Charles Rich, Candace L. Sidner, and Neal Lesh
Towards our goal of developing computer tutors that can collaborate with students on tasks in simulated environments, we have built a series of four prototype tutors. These tutors integrate two independent but related strands of research: intelligent tutoring systems and task-oriented dialogue systems. While the tutors share a core approach to teactfing procedural tasks, each was designed to explore a different set of issues. This paper outlines the issues that arise in taskoriented tutorial dialogue and the ways they have been addressed in these four tutors.