• Table of Contents
  • About the Author ix
  • Foreword xi
  • Acknowledgments xv
  • Introduction xvii
    1. Twin Types: More Than Just Two 1
    2. Living Laboratories: Double Designs and Multiple Methods 25
    3. Mythconceptions About Twin Conceptions—I 47
    4. Mythconceptions About Twin Conceptions—II 67
    5. Identical or Fraternal? Telling Twins Apart 91
    6. Biological Complexities, Myths, and Realities 115
    7. Mind Readers? Twin Telepathy, Intelligence, and Elite Performance 143
    8. Going to School and Speaking Out Loud 163
    9. Human Behavioral Variations: Sex and Sex Differences 183
    10. Good Twin–Evil Twin and Other Family Ties 209
    11. Twins, Clones, and Other Extraordinary Pairs 229
    12. Twin Spouses and Unrelated Look-Alikes: New Views 245
    13. Of Two Minds: Old Questions and Fresh Answers 263
  • Appendix 1: What About Hellin’s Law? And Does Weinberg Rule? 285
  • Appendix 2: Right-Handed or Left-Handed? 287
  • Appendix 3: Polar Body Twins: A Primer 289
  • Appendix 4: Nancy L. Segal’s Ten Classic Books on Twins 293
  • Appendix 5: Glossary of Terms and Abbreviations 295
  • Index 299