He is the author of "Qualitative Research Design: An Interactive Approach" (Sage, 1996), as well as papers on qualitative methodology, mixed method research, socio-cultural theory, and medical education. He has also worked extensively in applied settings. He has given seminars and workshops on teaching qualitative research methods and on using qualitative methods in various applied fields, and has been an invited speaker at conferences and universities in the U.S., Puerto Rico, Europe, and China. He has a Ph.D. in anthropology from the University of Chicago.