Blackboard-Based Dynamic Instructional Planner.

摘要

This research explores dynamic planning as a control mechanism for intelligent tutoring systems. The motivation for this research is a desire to integrate plan-based and opportunistic approaches to instruction to provide more effective and versatile tutoring systems. Although planned instruction is not always required, planning can provide more coherent instruction, more effective instruction. Furthermore, a dynamic planner allows a pedagogical knowledge to be applied during instruction rather than requiring a curriculum author to anticipate student performance and then pre-store appropriate tutorial responses. The more economic representation of pedagogical knowledge in the planner facilitates extension to new domains compared to a Computer Aided Instruction system, which procedurally encodes pedagogical decisions. The planner is also better suited to handling the combinatorics of tutorial situations in which mixed-initiative instruction is allowed, a fine-grained student model varies, time is limited, and there are many alternative instructional actions. The Blackboard Instructional Planner is a blackboard-based dynamic planner for intelligent tutoring systems. Although experimental, the planner demonstrates key plan generation and replanning capabilities required to handle common tutorial situations. (kr)