Joseph S DumasJoe Dumas is a recognized expert in usability evaluation. He has 25 years experience as a usability professional. He as moderated or observed others moderate thousands of usability testing sessions and taught numerous students and usability professioals how to moderate. He is the author of A practical guide to usability testing (with Ginny Redish), Designing user interfaces for software, and numerous articles, both for researchers and practitioners. 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 Human Factors in Information Design Master's Degree program. He has a Ph.D. in Cognitive Psychology. Read More Read Less