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Liz Twombly's areas of training, research and teaching include developmental and social-emotional screening of young children, and the inclusion of parents in all aspects of their young child's education. Liz also provides training throughout the nation on the use of the Ages and Stages Questionnaires (ASQ), a system to screen infants and children who are at risk for developmental delays.

Twombly has worked the last six years working as a senior research assistant on the development of the Ages and Stages Questionnaires: Social/Emotional (ASQ:SE), a recently published parent-completed screening tool focused on social-emotional behaviors of children between the ages of 3 months and 5 and 1/2 years.