Biobehavioral Antecedents in the Development of Infant–Mother Attachment∗∗The preparation of this chapter was supported in part by grant #301-443-4843 from the National Institute of Mental Health to Peter Barglow and by a Foundation for Child Development Research Program grant for Young Scholars in Social and Affective Development to Lyle S. Joffe. The authors gratefully acknowledge the assistance of Nancy Hill, Carolyn Zoellner, and Carol Israel in the collection, coding, and analysis of the data presented.