Nancy L. Segal is professor of psychology at California State University, Fullerton, and director of the Twin Studies Center. She has authored over 250 scientific articles and six books on twins and twin development.
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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.... SEE MORE