Douglas M. Teti, PhD, is a Distinguished Professor in the Department of Human Development and Family Science at The Pennsylvania State University. A leading expert in developmental science, his research focuses on family processes, parenting, and infant development. He has authored numerous articles and books on developmental methodology and serves on editorial boards of major psychology and human development journals.

H. Harrington Cleveland III, JD, PhD, is a Professor in the Department of Human Development and Family Science at The Pennsylvania State University. His research explores adolescent development, peer relationships, and substance use prevention. Dr. Cleveland has published extensively on developmental research methods and serves as a consultant for large-scale longitudinal studies.

Kelly Rulison, PhD, is a Senior Research Scientist at Prevention Strategies, LLC. A former Associate Professor at The Pennsylvania State University, her expertise includes quantitative methods, social network analysis, and intervention science. Dr. Rulison's work focuses on designing and evaluating developmental interventions to improve social and behavioral outcomes.