Gary Edward SkaggsDr. Gary Skaggs is a Professor in the Educational Research and Evaluation Program at Virginia Tech. He teaches courses in test development and test theory as well as introductory and intermediate statistics. He is the author or co-auhor of 81 publications, including articles in peer-reviewed journals, papers in conference proceedings, book chapters, invited lectures, and professional conference papers/presentations. His research interests include test equating, differential item functioning, standard setting, and cognitive diagnostic models. Dr. Skaggs has served as a test and psychometric consultant to numerous professional organizations including the GED Testing Service, Maryland State Board of Education, National Board of Professional Teaching Standards, Carilion Clinic Department of Psychiatry, and the National Association of Secondary School Principals. Read More Read Less