Analyzing a new learning strategy according to different knowledge levels

Intelligent tutoring systems have recently evolved towards a co-operative approach between the learner and the system. Knowledge acquisition is facilitated by interaction with the system under the control of the learner. New tutoring strategies have been introduced to enhance motivation of the learner by involving a second learner or a companion who simulates the behaviour of a second learner in the learning process. An inverted model called ''learning by teaching'' in which the learner could teach the learning companion by giving explanations has also been presented. In this paper we discuss the advantage and the inconvenience of these strategies and present a new learning strategy which improves performance for good or intermediate learners. We describe an experiment with this strategy and compare results with those obtained with the companion. We analyze and discuss results obtained. Copyright (C) 1996 Published by Elsevier Science Ltd.