1. Adcock, A. B., Duggan, M. H., Nelson, E. K., & Nickel, C. (2006). Teaching effective helping skills at a distance. Quarterly Review of Distance Education, 7(4), 349–360.
2. Adcock, A., & Van Eck, R. (2005). Reliability and factor structure of the attitude toward tutoring agent scale (ATTAS). Journal of Interactive Learning Research, 16(2), 195–212.
3. Angeli, A. D., & Brahnam, S. (2008). I hate you! Disinhibition with virtual partners. Interacting with Computers, 20(3), 302–310.
4. Baddeley, A. D. (1992). Working memory. Science, 255, 556–559.
5. Bandura, A. (1986). Social foundations of thought and action: A social-cognitive theory. Englewood Cliffs, NJ: Prentice Hall.