G. Tanner Jackson Eric Mathews King-Ip Lin Andrew Olney Arthur C. Graesser Modeling Student Performance to Enhance the Pedagogy of AutoTutor. 368-372 2003 conf/um/2003 User Modeling http://dx.doi.org/10.1007/3-540-44963-9_50 db/conf/um/um2003.html#JacksonMLOG03