Yanbo Xu, Jack Mostow. Using Logistic Regression to Trace Multiple Sub-skills in a Dynamic Bayes Net. In Mykola Pechenizkiy, Toon Calders, Cristina Conati, Sebastián Ventura, Cristóbal Romero, John C. Stamper, editors, Proceedings of the 4th International Conference on Educational Data Mining, Eindhoven, The Netherlands, July 6-8, 2011. pages 241-246, www.educationaldatamining.org, 2011. [doi]