Joseph Beck Ryan Shaun Baker Albert T. Corbett Judy Kay Diane J. Litman Tanja Mitrovic Steve Ritter Workshop on Analyzing Student-Tutor Interaction Logs to Improve Educational Outcomes. 909 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3220&spage=909 2004 conf/its/2004 Intelligent Tutoring Systems db/conf/its/its2004.html#BeckBCKLMR04