David Foster is the founder of Kryterion, an Internet test administration company, and currently serves there as chief scientist and executive vice president. He is the author of numerous articles for industry trade journals and textbooks and sits on the Council for the International Test Commission. In this interview, Foster talks about his research and career prior to his most recent work at Kryterion, as well as the impetus for and evolution of Kryterion. He also talks a bit about test development and about the characteristics of a good online test and shares some words of advice about online proctored exams.