Douglas L. Medin is Louis W. Menk Professor of Psychology and Professor of Education and Social Policy at Northwestern University. He is the coauthor of The Native Mind and the Cultural Construction of Nature and coeditor of Folkbiology, both published by the MIT Press.

Scott Atran is Research Director in Anthropology at France's National Center for Scientific Research and Visiting Professor of Psychology and Public Policy at the University of Michigan. He is the coeditor, with Douglas Medin, of Folkbiology (MIT Press, 1999).