She has designed and implemented programs for preschools, families with young children, and early childhood professionals for more than twenty-five years. Dr. Masi is the dean of the Mailman Segal Institute of Early Childhood Studies at Nova Southeastern University in Florida and the mother of four children.Dr. Roni Cohen Leiderman is a developmental psychologist specializing in emotional development, positive discipline, and play. For more than twenty-five years, she has worked with young children, families, and professionals. Dr. Leiderman is the associate dean of the Mailman Segal Institute for Early Childhood Studies at Nova Southeastern University in Florida and the mother of two children.