Two Minds Are Better Than One: Integrating Tutor and Student Models in Adaptive Instructional Systems
摘要
Intelligent Tutoring Systems (ITSs) have traditionally focused on adapting instruction primarily based on student models. However, as adaptive training environments grow in complexity – with diverse intervention strategies and accounting for a multitude of student states – this singular focus can leave the system blind to the pedagogical effectiveness of its own actions. In this paper, we follow up on a modular ITS architecture [1] that integrates an independent tutor model alongside the student model. The tutor model logs and evaluates the tutor’s decision-making process in real time, enabling a more transparent and continuously refined approach to adaptive decision-making. We discuss the theoretical framing of pedagogical policy decision-making, review existing methods, detail the architecture of our tutor model (as implemented in the STATS adaptive training ecosystem [2]), and introduce a unified metric – the Action Performance Score – for evaluating intervention effectiveness. Finally, we explore implications for ITS design and propose avenues for future research.