Colleen Konicki Di Iorio, Ph.D., R.N., F.A.A.N, is a professor in the department of behavioral sciences and health education at Rollins School of Public Health, Emory University, and the associate editor of The Journal of Nursing Measurement. She has published numerous journal articles and book chapters on research and measurement methods in public health. Di Iorio is a contributor to the third edition of Health Education and Health Behavior from Jossey-Bass.