Deliberately Divided: Inside the Controversial Study of Twins and Triplets Adopted Apart

In the early 1960s, the head of a prominent New York City Child Development Center and a psychiatrist from Columbia University launched a study designed to track the development of twins and triplets given up for adoption and raised by different families. The controversial and disturbing catch? None of the adoptive parents had been told that they were raising a twin-the study's investigators insisted that the separation be kept secret. Here, Nancy Segal reveals the inside stories of the age...