About the Authors Joe Dumas is a recognized expert in usability evaluation with twenty-five years of experi- ence. He has moderated or observed others moderate thousands of usability testing ses- sions and has taught numerous students and usability professionals how to moderate. He is currently a usability consultant for Oracle Corporation. He was a senior human factors specialist at Bentley College's Design and Usability Center and taught graduate courses in the college's graduate program in Human Factors in Information Design. He has a Ph.D. in cognitive psychology from the State University of New York at Buffalo. He is the author of A Practical Guide to Usability Testing (with Ginny Redish), Designing User Interfaces for Software, and numerous articles written for researchers and practitioners. Beth Loring is director of the Bentley Design and Usability Center, a research and con-