Thomas R. Knapp, EdD, FAAN is Professor Emeritus of Education and Nursing at the University of Rochester and The Ohio State University. He received his EdD from Harvard University. His specialty is research methodology (statistics, measurement, design).Dr. Knapp has published several books and numerous articles on reliability and validity and other methodological topics in education and nursing, some of which are now accessible free of charge on his website www.tomswebpage.net. He also served for many years as a referee for research journals in education and nursing.