Born Together--Reared Apart: The Landmark Minnesota Twin Study

Born Together--Reared Apart: The Landmark Minnesota Twin Study

by Nancy L. Segal
     
 

ISBN-10: 0674055462

ISBN-13: 9780674055469

Pub. Date: 06/18/2012

Publisher: Harvard

The identical “Jim twins” were raised in separate families and met for the first time at age thirty-nine, only to discover that they both suffered tension headaches, bit their fingernails, smoked Salems, enjoyed woodworking, and vacationed on the same Florida beach. This example of the potential power of genetics captured widespread media attention in

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Overview

The identical “Jim twins” were raised in separate families and met for the first time at age thirty-nine, only to discover that they both suffered tension headaches, bit their fingernails, smoked Salems, enjoyed woodworking, and vacationed on the same Florida beach. This example of the potential power of genetics captured widespread media attention in 1979 and inspired the Minnesota Study of Twins Reared Apart. This landmark investigation into the nature-nurture debate shook the scientific community by demonstrating, across a number of traits, that twins reared separately are as alike as those raised together.

As a postdoctoral fellow and then as assistant director of the Minnesota Study, Nancy L. Segal provides an eagerly anticipated overview of its scientific contributions and their effect on public consciousness. The study’s evidence of genetic influence on individual differences in traits such as personality (50%) and intelligence (70%) overturned conventional ideas about parenting and teaching. Treating children differently and nurturing their inherent talents suddenly seemed to be a fairer approach than treating them all the same. Findings of genetic influence on physiological characteristics such as cardiac and immunologic function have led to more targeted approaches to disease prevention and treatment. And indications of a stronger genetic influence on male than female homosexuality have furthered debate regarding sexual orientation.

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Product Details

ISBN-13:
9780674055469
Publisher:
Harvard
Publication date:
06/18/2012
Pages:
416
Sales rank:
956,631
Product dimensions:
6.50(w) x 9.30(h) x 1.30(d)

Table of Contents

Introduction 1

1 The Jim Twins (February-March 1979) 17

2 15,000 Questions x 137 Pairs 32

3 Early Findings (1979-1983) 65

4 Sexual Orientation, Cognition, and Medical Traits (1984-1987) 82

5 Pivotal Papers: Personality and IQ (1988 and 1990) 97

6 Job Satisfaction, Cardiac Characteristics, and More (1989-1990) 116

7 Psychopathology and Religiosity (1990) 136

8 Dental Traits, Allergies, and Vocational Interests (1991-1992) 153

9 Creativity, Work Values, and Evolution (1992-1993) 171

10 Family Environments, Happiness, Sensation Seeking, and the MMPI (1994-1997) 195

11 "Larks" and "Owls," Ego Development, and Authoritarianism (1998-2002) 221

12 Twin Relationships, Social Attitudes, and Mental Abilities (2003-2005) 246

13 Sexual Development, Fluctuating Asymmetry, Body Size, and the Structure of Intelligence (2006 and Beyond) 266

14 Questions, Answers, and Twin Studies of the Future 298

Appendix A Funding Sources 329

Appendix B Glossary 333

Notes 339

Acknowledgments 397

Index 401

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