Atkinson, R. K. (2002). Optimizing learning from examples using pedagogical agents. Journal of Educational Psychology, 94(2), 416–427.
Bosseler, A., & Massaro, D. (2003). Development and evaluation of a computer-animated tutor for vocabulary and language learning in children with autism. Journal of Autism and Developmental Disorders, 33(6), 653–672.
Craig, S. D., Driscoll, D. M., & Gholson, B. (2004). Constructing knowledge from dialog in an intelligent tutoring system: Interactive learning, vicarious learning, and pedagogical agents. Journal of Educational Multimedia and Hypermedia, 13(2), 163–183.
Dalton, B. Pisha, B., Eagleton, M., Coyne, P., & Deysher, S. (2001). Engaging the text: Reciprocal teaching and questioning strategies in a scaffolded learning environment. Final report to the U.S. Department of Education. Peabody, MA: CAST.
Graesser, A. C., McNamara, D.S., & Van Lehn, K. (2005). Scaffolding deep comprehension strategies through Point&Query, AutoTutor, and iSTART. Educational Psychologist, 40(4), 225–234.
Graesser, A. C., Lu, S., Jackson, G. T., Mitchell, H., Ventura, M., Olney, A., & Louwerse, M. M. (2004). AutoTutor: A tutor with dialogue in natural language. Behavioral Research Methods, Instruments, and Computers, 36, 180–192.
Lester, J. C., Stone, B., & Stelling, G. (1999). Lifelike pedagogical agents for mixed-initiative problem solving in constructivist learning environments. User Modeling and User-Adapted Interaction, 9, 1–44.
Maloy, R. W., Razzaq, L., & Edwards, S. A. (2014). Learning by choosing: Fourth graders use of an online multimedia tutoring system for math problem solving. Journal of Interactive Learning Research, 25(1), 51–64.
Moreno, R. (2005). Multimedia learning with animated pedagogical agents. In R. E. Mayer (Ed.), The Cambridge handbook of multimedia learning (pp. 507–523). New York: Cambridge University Press.
Moundridou, M., & Virvou, M. (2002). Evaluating the personal effect of an interface agent in a tutoring system. Journal of Computer Assisted Learning, 18, 253–261.
Roll, I., Aleven, V., McLaren, B. M., & Koedinger, K. R. (2011). Improving students’ help-seeking skills using metacognitive feedback in an intelligent tutoring system. Learning and Instruction, 21(2), 267–280.
Ward, W., Cole, R., Bolaños, D., Buchenroth-Martin, C., Svirsky, E., & Weston, T. (2013). My science tutor: A conversational multimedia virtual tutor. Journal of Educational Psychology, 105(4), 1115.
VanLehn, K. (2011). The relative effectiveness of human tutoring, intelligent tutoring systems, and other tutoring systems. Educational Psychologist, 46(4), 197–221.