#Confused and beyond: detecting confusion in course forums using students' hashtags. - Shay A. Geller; Nicholas Hoernle; Kobi Gal; Avi Segal; Amy X. Zhang; David R. Karger; Marc T. Facciotti; Michele Igo (LAK, 2020)

New Methods for Confusion Detection in Course Forums: Student, Teacher, and Machine. - Shay A. Geller; Kobi Gal; Avi Segal; Kamali Sripathi; Hyunsoo Gloria Kim; Marc T. Facciotti; Michele Igo; Nicholas Hoernle; David R. Karger (IEEE Trans. Learn. Technol., 2021)