Behavioral and Autonomic Antecedents of Attachment in High-Risk Infants**The research presented in this chapter took place at the Infant Laboratory, Institute for the Study of Exceptional Children, St. Luke's–Roosevelt Hospital Center, New York, New York, and was supported by a contract from the Bureau for the Education of the Handicapped #300-77-0702. Preparation of this chapter was supported by a grant from the General Research Board of the Graduate School, University of Maryland, College Park. The author would like to thank Stephen Porges for his helpful comments on an earlier draft of this chapter.