Editor-in-Chief Hal Pashler, Ph.D., University of California, San Diego, Department of Psychology, La Jolla, CA Volume Editor Douglas Medin, Ph.D., Northwestern University, Department of Psychology, Evanston, IL Douglas Medin is Professor of Psychology at Northwestern University. His research interests include categorization, reasoning, decision making and the role of culture and expertise in each of these. He is a past editor of the journal Cognitive Psychology.