Ms. Twombly has been involved in research, outreach, and training projects related to ASQ for 14 years. Most recently she has worked as a Senior Research Assistant in the development of ASQ:SE and as a co-author on the Ages & Stages Learning Activities. Ms. Twombly trains early childhood professionals nationwide from fields such as early intervention, child care, and public health on the development of screening systems in home-visiting, center-based and medical settings. Ms. Twombly trains on the use of ASQ-3™ and ASQ:SE as tools to screen and monitor general development and social-emotional development in children from the ages of birth to 6 years. She has a master's degree in early intervention from the University of Oregon.

Dr. Squires has served as principal investigator on research studies at the University of Oregon on the ASQ system. She is a professor in special education, focusing on early intervention and early childhood special education. She directs the Early Intervention Program and is associate director of the University of Oregon Center for Excellence in Developmental Disabilities.

Dr. Squires has directed national outreach training activities related to developmental screening and the involvement of parents in the assessment and monitoring of their child's development. She currently directs research grants related to early childhood mental health and systems change related to early identification and treatment of newborn infants exposed prenatally to drugs and alcohol. In addition to her interests in screening and early identification, Dr. Squires directs the doctoral and master's level early intervention/special education personnel preparation programs and teachers courses in early intervention/special education at the University of Oregon.

Dr. Bricker is the former director of the Early Intervention Program at the University of Oregon 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.

Dr. Yockelson earned her doctorate in Early Intervention at the University of Oregon in 1999 and stayed to teach undergraduate and graduate students in the Educational Studies major until 2007. Between 2007 and 2011, Dr. Yockelson taught pediatricians, family practitioners, residents and medical students about the importance of early identification and referral for developmental and mental health concerns, and assisted with systems development for routine developmental screening.

As a co-author of the ASQ:SE and co-developer of the training materials for the ASQ:SE and ASQ-3, she consults with various local and state programs on using the Ages & Stages system for developmental and behavioral screening of infants and young children.

Dr. Yockelson's research interests include the social and emotional development of infants and young children, inclusion, and parent education.

Currently, Dr. Yockelson is on faculty in the School of Education at Brandman University in California, teaching in the Special Education and Early Childhood education programs.

Maura Schoen Davis, M.S., is a doctoral candidate at the University of Oregon and is writing a dissertation proposal to further investigate the interrater reliability and concurrent validity of the Ages & Stages Questionnaires: Social-Emotional. She has a master's degree in school psychology and has worked in early intervention and early childhood special education since 1991. Her research interests include screening and assessment of very young children.

Dr. Kim works with Early Childhood and Elementary Education Master of Arts in Teaching Program students at Southern Oregon University. She graduated from Sogang University in Seoul, Korea, in 1985. She received her master's degree in 1992 and her doctorate in 1996 from the University of Oregon in the area of early intervention/early childhood special education. Her special research interests include alternative assessment for young children with special needs, parent involvement in early intervention, and young children with emotional and social challenges, as well as multicultural education for children with diverse backgrounds. She lives with her husband and two young, bilingual children in Ashland, Oregon.