Katherine Forbes-Riley Diane J. Litman Alison Huettner Arthur Ward Dialogue-Learning Correlations in Spoken Dialogue Tutoring. 225-232 2005 AIED conf/aied/2005 db/conf/aied/aied2005.html#Forbes-RileyLHW05 http://www.booksonline.iospress.nl/Content/View.aspx?piid=1313