INTELLIGENT TUTORING AND ASSESSMENT BUILT ON AN UNDERSTANDING OF A TECHNICAL PROBLEM-SOLVING TASK

In this paper we describe Hydrive, an operational computer-based intel ligent tutoring system built to help Air Force technicians develop gen eralizable skills for troubleshooting hydraulics systems. We use Hydri ve as an example of how effective training and assessment is developed from a coherent understanding of a target task and how this understan ding can be consistently represented in all aspects of a training/asse ssment instrument. We show how an organizing principle of expert behav ior, active path analysis, is used to inform the design and content of the tutor's system, student and instructional models and the design o f the tutor's interface. We conclude with information about Hydrive's field trial evaluation and some thoughts on knowledge acquisition and generalizability.