Andrew Hayes (Ph.D., Cornell University; B.A., San Jose State University) holds joint appointments in Communication and Psychology at The Ohio State University. His training is in quantitative psychology and his specialties are research methodology, psychometrics, data analysis, and the application of psy�chological knowledge and theory to communication processes.� He has published in the statistical meth�odology, social psychology, and public opinion literatures and is author of the forthcoming book Statisti�cal Methods for Communication Science (LEA).