Born Together - Reared Apart: The Landmark Minnesota Twin by Nancy L. Segal PDF

By Nancy L. Segal

ISBN-10: 0674055462

ISBN-13: 9780674055469

The exact “Jim twins” have been raised in separate households and met for the 1st time at age thirty-nine, basically to find that they either suffered pressure complications, bit their fingernails, smoked Salems, loved woodworking, and vacationed at the related Florida seashore. this instance of the capability energy of genetics captured common media realization in 1979 and encouraged the Minnesota research of Twins Reared aside. This landmark research into the nature-nurture debate shook the medical neighborhood through demonstrating, throughout a few features, that twins reared individually are as alike as these raised jointly.

As a postdoctoral fellow after which as assistant director of the Minnesota examine, Nancy L. Segal offers an eagerly expected review of its clinical contributions and their impression on public recognition. The study’s facts of genetic effect on person modifications in qualities comparable to character (50%) and intelligence (70%) overturned traditional rules approximately parenting and educating. Treating little ones another way and nurturing their inherent skills all at once a fairer technique than treating all of them an identical. Findings of genetic impression on physiological features similar to cardiac and immunologic functionality have resulted in extra particular ways to illness prevention and therapy. And symptoms of a higher genetic impact on male than lady homosexuality have furthered debate concerning sexual orientation.

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Sample text

Springer had had two heart attacks, and Lewis had been hospitalized for a suspected heart problem. 15 Their biological family’s health history may have placed them at higher risk, but this information was unknown. The twins’ smoking habits and visual acuity were also alike. There is something to be said for being present in order to appreciate and absorb what was taking place during the reared-apart twin assessments. Bouchard once explained that the MISTRA actually took place on two levels, statistical and anecdotal.

On December 6, 1979, when I was a graduate student, I summarized my dissertation research on twins for the Children’s Home and Aid Society of Illinois and mentioned the MISTRA. A social worker confessed to me that her agency had separated female twins, Barbara and Judy, thirty-one years earlier, yet neither twin knew they were part of a set. The social workers believed that separating the twins was advisable because Barbara (the fussy twin) might not receive the attention she needed if placed with Judy (the engaging twin).

Meg Keyes was struck by the Jims’ similar personalities. ” Susan Resnick was in the observation booth during the videotaped interviews: “Their gestures, the way they crossed their legs, were remarkably alike. ” When the twins returned to Minnesota in August, Lewis’s younger identical twin brothers (Gary and Larry) and their wives, and Springer’s younger brother (also Larry) and his wife completed an abbreviated version of the test battery. Gathering data from the twins’ unrelated siblings (with whom they had shared environments but not genes) was another way to assess the relative effects of genetic and environmental influences on behavior.

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Born Together - Reared Apart: The Landmark Minnesota Twin Study by Nancy L. Segal

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