St. Amant, R., and Horton, T. E. Revisiting the definition of tool use. Animal Behaviour, in press.
St. Amant, R., Horton, T. E., and Ritter, F. E. (2007). Model-based evaluation of expert cell phone menu interaction. ACM Transactions on Human-Computer Interaction 14(1): 1-24.
Wood, A. B., Horton, T. E., and St. Amant, R. (2005). Effective tool use in a habile agent. Proceedings of the IEEE Systems and Information Engineering Design Symposium. (Undergraduate and graduate student research symposium).
St. Amant, R., Horton, T. E., and Ritter, F. E. (2004). Model-based evaluation of cell phone menu interaction. Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI), pp. 343-350.
St. Amant, R., and Horton, T. E. (2002). A tool-based interactive drawing environment. ACM Conference on Human Factors in Computing Systems (CHI) Extended Abstracts, pp. 762-763.
St. Amant, R., and Horton, T. E. (2002). Characterizing tool use in an interactive drawing environment. Second International Symposium on Smart Graphics, pp. 86-93.
Horton, T. E. (2004). HabilisDraw: A tool-based direct manipulation software environment. Department of Computer Science, NC State University.
Horton, T. E. (2006). Hmmm, totally forgotten at the moment. Department of Computer Science, NC State University.
Williams, L., and Horton, T. E. (2007). The Creation and Implications of Robotic Tool-Users. Microsoft eScience Workshop 2007.
Horton, T. E. (2004). Tool-based direct manipulation interfaces. ITR Workshop, Rostock, Germany.
St. Amant, R., Ferenecova, A., Principe, N., Horton, T. E., and Williams, L. (2007). AugFrog: A Desktop Augmented Reality Game.
St. Amant, R., and Horton, T. E. Tool-Based Direct Manipulation Environments.