RESEARCH
I am interested
in techniques to improve the design of computer systems with respect
to their usefulness and usability. To that end, I have investigated
the effectiveness and usability of several HCI techniques (e.g., think-aloud
usability studies, Cognitive Walkthrough, GOMS) and produced new techniques
for bringing usability concerns to the design process (e.g., CPM-GOMS
and software architecture evaluation for usability). Much of my work
focuses on cognitive modeling, where I work within a unified theory
of cognition to develop models of human performance that produce quantitative
predictions of performance with less effort than prototyping and user
testing. I also work on bridging the gap between HCI and software
engineering, specifically including usability concerns in software
architecture design.