About
John W. Graham is a professor in the department of Biobehavioral Health at Pennsylvania State University. Dr. Graham received his Ph.D. degree in Social Psychology in 1983 from the University of Southern California. For the past 25 years, Dr. Graham's research focus has been on drug and alcohol abuse prevention in adolescent and young adult populations. Over the years, Dr. Graham's substantive work has involved intervention and prevention-theory research, and has been largely in collaboration with substance abuse prevention researchers from around the country. Dr. Graham's methodological work has always been in service to the valid evaluation of a larger prevention intervention program. His research in this regard has involved development of measures; measurement strategies for large-scale interventions; exploratory and confirmatory factor analysis; and structural equation modeling and mediating variable analysis. Since the late 1980s, Dr. Graham's work has focused on analysis of missing data, including multiple imputation and several maximum likelihood methods for handling missing data. Most recently, Dr. Graham's work has centered on "planned missing data" measurement designs. These designs take advantage of the modern missing data analysis tools to produce strategies for cost effective data collection and analysis.