with particular focus on census undercount, model validation, and robust estimation. He is a fellow of the American Statistical Association and an elected member of the International Statistical Institute. He received a Ph.D. in statistics from Stanford University.
FREDERICK CONRAD is research professor in the Institute for Social Research at the University of Michigan, adjunct associate professor of psychology at the University of Michigan, and research associate professor in the Joint Program in Survey Methodology at the University of Maryland. He spent more than 10 years at the Bureau of Labor Statistics as a senior research psychologist, where he twice received the U.S. Department of Labor Secretary’s Exceptional Achievement Award. His research involves new data collection methods such as interactive web surveys and virtual interviewers; interviewer—respondent interaction, including the effects of spoken language on outcomes of survey invitation interactions; reliability of pretesting techniques; and the role of public events in personal memory. He has received National Science Foundation grants for research on responding to surveys on mobile, multimodal devices; animated agents in self-administered surveys; adaptive interfaces for collecting survey data from users; costs and benefits of conversational interviews; and the usability of electronic voting systems. He served on the National Research Council’s panel to review the U.S. Department of Agriculture’s Agricultural Resource Management Survey. He served as associate editor of the Journal of Offcial Statistics from 2002 to 2011 and coedited a special issue of Applied Cognitive Psychology on cognitive aspects of survey methodology. He is a past member of the editorial board of Public Opinion Quarterly. He has a Ph.D. in cognitive psychology from the University of Chicago.
DONALD A. DILLMAN is regents professor in the Department of Sociology at Washington State University. He also serves as deputy director for research and development in the Washington State University Social and Economic Sciences Research Center (SESRC), and he founded the SESRC’s Public Opinion Laboratory, one of the first university-based telephone survey laboratories in the United States. He served as a senior survey methodologist in the Office of the Director of the U.S. Bureau of the Census, leading to the development of new questionnaire designs and procedures for the 2000 decennial census and other government surveys. He has written or co-written 13 books and has 245 other publications. He has had a career-long emphasis on research to improve survey methodolo-