Interpreting information regarding health risks, crime statistics, and government polls requires some ability to use and interpret probabilities. Studies have shown that even after training or coursework in probability and statistics, people still have many difficulties solving probability problems. The thesis of this document is that helping…

Reports on the development of a composite learner model for adaptive tutoring systems that combines a model of learner attributes with a simple overlay model of the learner's domain knowledge state. The system is able to select the optimal form of learning material to be presented for the subject. (MJP)