Donna Wittmer, PhD, is associate professor emerita of early childhood and early childhood special education in the School of Education at the University of Colorado, Denver. She earned her doctorate in child, family, and community studies at Syracuse University. A prolific author, she has written dozens of articles and books on early childhood development. She is a sought-after speaker and presenter worldwide.
From Biting to Hugging: The Social Development of Infants and Toddlers