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Registry of Adolescent and Young Adult Twins in the Tokyo Area

Published online by Cambridge University Press:  21 February 2012

Chizuru Shikishima*
Affiliation:
Department of Human Sciences, Faculty of Letters, Keio University, Japan. kana-s@sa2.so-net.ne.jp
Juko Ando
Affiliation:
Department of Human Sciences, Faculty of Letters, Keio University, Japan.
Yutaka Ono
Affiliation:
Health Center, Keio University, Japan.
Tatsushi Toda
Affiliation:
Department of Medical Genetics, Osaka University Graduate School of Medicine, Japan.
Kimio Yoshimura
Affiliation:
Department of Health Policy and Management, School of Medicine, Keio University, Japan.
*
*Address for correspondence: Chizuru Shikishima, 1–40–30 Naritahigashi, Suginami-ku, Tokyo 166–0015, Japan.

Abstract

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Since established in 1998, the Keio Twin Project (KTP) has been dedicated to investigating genetic and environmental sources contributing to human psychological traits in adolescence and young adulthood. A population-based twin registry was constructed by the KTP through the use of official residential records in the Tokyo area, and to date requests to participate in our research have generated 1040 pairs of twins and triplets of age 14 to 30, forming one of the largest twin registries in Asia. Our comprehensive datasets, obtained through questionnaires, performance tests, and physical measurements, cover a wide range of human traits: personality, psychiatry, mental health, sociality, cognition, and physical index. Demographic variables and environment of upbringing are also sought by twins and by some parents. This extensive information allows us to clarify the genetic and environmental overlap across multiple traits as well as specificities unique to single traits. Adding an evolutionary psychology perspective to the behavior genetics framework is currently being attempted in order to develop a grand theory of human genetics.

Type
Articles/Japan
Copyright
Copyright © Cambridge University Press 2006