I have successfully defended my Ph.D. Dissertation, thus completing the requirements for the Ph.D. degree at Arizona State University.

I am deeply grateful to have had such an outstanding committee. My thanks to my advisor Dr. Winslow Burleson, HCI researcher and MTI Media Lab alumnus; Dr. David Garlan, software architecture expert and Director of Professional Software Engineering Programs at Carnegie Mellon University; Dr. James Collofello, software engineering researcher and Senior Associate Dean at Arizona State University; Dr. Robert Atkinson, cognitive sciences researcher, awarded numerous grants from NSF and ONR, whose lab provided the equipment used in my research; and, Dr. Hessam Sarjoughian, software modeling and design researcher and Co-director of the Arizona Center for Integrative Modeling & Simulation. My thanks to all for providing direction and clarity for my work.