JoAnn (JJ) Johnson, Ph.D., is associate professor in the Child and Family Studies Department in the School of Education at Saint Cloud State University in Minnesota, USA. Previously, she worked at University Centers for Excellence in Developmental Disabilities in Louisiana, Oregon, and Nevada, USA, serving as a center-based coordinator and teacher for young children ages 2–5, as a Graduate Teaching Fellow and home services coordinator, and as an adjunct faculty member, grant and contract director, project administrator, and service provider. She was also Director of the Research and Educational Planning Center and the Nevada University Center, USA for Excellence in Developmental Disabilities from 2001 to 2008. Her professional experiences in disabilities services and studies include hospital-, home-, and center-based early intervention and developmental services; developmental assessment and evaluation; supervision and program coordination; and university and outreach training and instruction. Since the 1990s, Dr. Johnson has worked with both federal and numerous state departments of education and provided workshops and training throughout the United States and internationally on the use of the AEPS and activity-based intervention for families and professionals. In her spare time, Dr. Johnson likes to read, work on home projects, and observe young children’s development. Dr. Diane Bricker is the former director of the Early Intervention Program at the University of Oregon, USA and a key developer of the ASQ and AEPS® systems. She has focused her professional career on the development and study of assessment systems and intervention approaches for young children with disabilities and those at risk for developing disabilities. Dr. Bricker has been instrumental in the development of graduate-level personnel preparation programs that have produced professionals who are delivering quality services to thousands of young children and their families. She has published extensively in the field of early intervention.