Judy Robertson Beth Cross Hamish Macleod Peter M. Wiemer-Hastings Children's Interactions with Animated Agents in an Intelligent Tutoring System. 335-357 2004 14 I. J. Artificial Intelligence in Education 3-4 http://iospress.metapress.com/content/pbw25hy6cnp0g8jv/ db/journals/aiedu/aiedu14.html#RobertsonCMW04