1. Self-explanations, do we get them from our students?;Barnard,1996
2. Validating pedagogical agent roles: Expert, motivator, and mentor;Baylor,2003
3. Which pedagogical agent do learners choose? The effects of gender and ethnicity;Baylor,2003
4. Between pets and people;Beck,1996
5. Learning by teaching: a new agent paradigm for educational software;Biswas;Applied Artificial Intelligence,2005