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Acknowledgments. Work from the author's lab- 

 oratory, described in this chapter, was accom- 

 plished with the support of research grants from 

 the National Science Foundation (G2546), the Na- 

 tional Institutes of Health of the United States 

 Public Health Service (M2271 and C3617), the 

 Rockefeller Foundation, and the Rutgers Univer- 

 sity Research Council (261), to all of whom grateful 

 acknowledgment is made. 



Dr. I. Eibl-Eibesfeldt, Dr. R. A. Hinde, and Dr. 

 J. S. Rosenblatt each read various parts of the 

 chapter, and made many helpful suggestions. 



Miss June Thomas typed the manuscript. Miss 

 Thomas and Miss Nina Lehrman assisted with the 

 difficult task of proof-reading. 



