Douglas Medin is the Louis W. Menk Chair in Psychology at Northwestern and a member of the National Academy of Sciences. He previously taught at the University of Illinois and the University of Michigan. Best known for his research on concepts and categorization, his recent research interests have extended to decision making; cross-cultural studies of reasoning and categorization; models of similarity, culture, and cognition, and cognitive dimensions of moral reasoning. Dr. Medin is an editior for Cognition and for the Journal of Experimental Psychology: Human Learning and Memory. He also serves as a consulting editor for Cognitive Psychology and was past editor of Psychology of Learning Motivation. He has conducted research on cognition and learning among both indigenous and majority culture populations in Guatemala, Brazil, Mexico and the United States. He is a recent recipient of the APA Distinguished Scientific Contribution Award, a member of the American Academy of Arts and Sciences.