CALIFORNIA UNIV IRVINE SCHOOL OF INFORMATION AND COMPUTER SCIENCE
This document reviews three previous models of incremental concept formation and presents a model, CLASSIT, that extends these earlier systems. All of the models integrate the process of recognition and learning, and all can be viewed as carrying out a search through the space of possible concept hierarchies. In an attempt to show that CLASSIT is a robust model of concept formation, empirical studies of the systems behavior under a variety of conditions are also presented. Keywords Cognitive psychology Tutors.