FROM AMAZON.COM:

The documentary Three Identical Strangers captivated viewers with the story of identical triplets who were separated at birth, studied by psychiatrists, and kept unaware of one another’s existence. Deliberately Divided is the inside story of the history and science behind this disturbing event, told by a leading researcher and a gifted expositor.
-- Steven Pinker, Johnstone Professor of Psychology, Harvard University, and author of “The Blank Slate” and “Rationality”

Before reading Deliberately Divided it never occurred to me that a book on the study of twins could be a gripping drama. Yet here, Nancy Segal, herself a professor of psychology (and a twin), writes so movingly about an unfortunate twin study that deliberately left many twins to grow up apart. Was this disruption of human lives worth the cost just to learn something about human nature? I was on the edge of my seat waiting to find out what happened when the long-separated twins found each other later in life. This is one of the most educational and entertaining books on psychology I’ve ever read.
-- Elizabeth F. Loftus, distinguished professor, University of California, Irvine and former president, Association for Psychological Science

This is surely the last word on studies of twins raised apart, the most profound experiment nature has to offer on the relative contributions of genes and the environment to the makeup of the human personality. Nancy Segal has given us a career’s-worth of insight into the twin experience.
-- Lawrence Wright, author of “Twins” and “The Plague Year"

A rich, moving, and comprehensive account of a human drama every living person can identify with. Being both a twin and a twin researcher with deep experience in the domain under discussion, Dr. Segal brings a unique perspective to bear on the moral and ethical issues this controversial study raises. She touches every base with clarity, compassion, intelligence and common sense.
-- Thomas J. Bouchard, Jr, PhD, Professor Emeritus, Department of Psychology, University of Minnesota, and Director, Minnesota Study of Twins Reared Apart

Deliberately Divided is a superb read! Written by Nancy L. Segal, a top international expert on twin research, the book conveys the amazing stories of the twins, their families, and the investigators behind a controversial study of intentionally separated twins and triplets who were secretly studied in the 1960s–70s. Deliberately Divided is a must-read for anyone concerned with human studies, research ethics, and the welfare of children. You will be riveted from start to finish as I was.
-- Nicholas G. Martin, PhD, editor, “Twin Research and Human Genetics”

Segal’s expertise on twins raised apart, primarily from her training and work on the Minnesota Study of Twins Reared Apart, makes her the ideal researcher to write this current book.... An incredible amount of detective work was needed to put together the very complicated minutiae of this story of how twins and triplets were separated and how they were studied. Segal does a strong job of describing her entire data collection process.... Researchers and others who became aware of this series of events from recent films, such as Three Identical Strangers, will find the details provided in Segal’s book to be illuminating....
-- Lisabeth F. DiLalla, Ph.D., Department of Psychology, University of Southern Illinois

Typical of all of her books, Deliberately Divided couples Segal’s research skills, worthy of those of a Pulitzer-class investigative journalist, with rigorous scientific interpretations and her own perceptive ideas and insights regarding what may or may not have actually happened and why. Her combination of fascinating accounts about the twins, their families, and the protagonists at LWS-CDC and her in-depth treatment of the scientific, legal, and ethical issues surrounding the controversial study will make the book appealing to readers from all walks of life. The whole book is the epitome of sound scholarship and makes fascinating reading.
-- Tony Vernon, Ph.D., Department of Psychology, Mt. Royal University, Calgary, Canada

FROM JOURNALS, NEWSLETTERS, NEWSPAPERS and WEBSITES:

Twiniversity (2022)
https://www.twiniversity.com/2022/01/deliberately-divided-inside-the-controversial-study-of-twins-triplets-apart/

Journal of the History of the Behavioral Sciences (2022)
https://drnancysegaltwins.org/images/deliberately-divided/Review_JHistBSci_DD_2822.pdf

Behavior Genetics (2021)
https://link.springer.com/article/10.1007/s10519-021-10086-4

Twin Research and Human Genetics (2021)
https://drnancysegaltwins.org/images/PDF/TRHG_Deliberately_Divided_SEGAL2021.pdf

Personality and Individual Differences (2021)
https://drnancysegaltwins.org/images/PDF/reviews/personality_and_individual_differences.pdf

Human Ethology (2021)
https://ishe.org/volume-36-2021-2/divided-twins-dissociated-researchers/

Evolution and Human Behavior (2021)
http://drnancysegaltwins.org/images/PDF/reviews/EHB_DD_2021.pdf

Twinless Twins Winter Newsletter (2021)
https://drnancysegaltwins.org/images/PDF/DDTwinlessTwinsNewsWinter2021.pdf

 

 FROM THE MEDIA: 

Twin Magazine--the Netherlands, in English, 2022)
http://drnancysegaltwins.org/images/deliberately-divided/Review_of_DD_TranslDutch2Eng.pdf

Quillette (2021)
https://quillette.com/2021/11/08/deliberately-divided-a-review/

CSU Fullerton (2021)
https://news.fullerton.edu/2021/10/lessons-from-a-controversial-study-that-deliberately-divided-twins/

Orange County Register (2021)
https://www.ocregister.com/2021/11/05/csuf-professors-book-sheds-light-on-a-mid-century-scandal/

New York Post (2021)
https://nypost.com/2021/12/11/twins-reveal-horror-of-study-that-kept-them-apart-for-decades/