Improving Intelligent Tutoring Systems: Using Expectation Maximization to Learn Student Skill Levels.

Kimberly Ferguson Ivon Arroyo Sridhar Mahadevan Beverly Park Woolf Andrew G. Barto Improving Intelligent Tutoring Systems: Using Expectation Maximization to Learn Student Skill Levels. 453-462 2006 conf/its/2006 Intelligent Tutoring Systems http://dx.doi.org/10.1007/11774303_45 db/conf/its/its2006.html#FergusonAMWB06