Positive and negative verbal feedback for Intelligent Tutoring Systems. - Barbara Di Eugenio; Xin Lu; Trina C. Kershaw; Andrew Corrigan-Halpern; Stellan Ohlsson (AIED, 2005)

Toward a Computational Model of Expert Tutoring: A First Report. - Barbara Di Eugenio; Trina C. Kershaw; Xin Lu; Andrew Corrigan-Halpern; Stellan Ohlsson (FLAIRS, 2006)

Expert vs. Non-expert Tutoring: Dialogue Moves, Interaction Patterns and Multi-utterance Turns. - Xin Lu; Barbara Di Eugenio; Trina C. Kershaw; Stellan Ohlsson; Andrew Corrigan-Halpern (CICLing, 2007)