The Southern California Twin Register at the University of Southern California: II

Twin Research and Human Genetics, Vol. 9, No. 6, pp. 1-8, December 2006

15 Pages Posted: 20 Aug 2007

See all articles by Laura A. Baker

Laura A. Baker

University of Southern California - Department of Psychology

Mafalda Barton

University of Southern California - Department of Psychology

Dora I. Lozano

University of Southern California - Department of Psychology

Adrian Raine

University of Southern California - Department of Psychology

James H. Fowler

UC San Diego Division of Social Sciences; UC San Diego School of Medicine

Abstract

The Southern California Twin Register was initiated in 1984 at the University of Southern California, and continues to grow. This paper provides an update of the register since it was described in the 2002 special issue of this journal. The register has expanded considerably in the past four years, primarily as a result of recent access to Los Angeles County birth records and voter registration databases. Currently, this register contains nearly 5000 twin pairs, the majority of whom are school age. The potential for further expansion in adult twins using voter registration records is also described. Using the Los Angeles County voter registration database, we can identify a large group of individuals with a high probability of having a twin who also resides in Los Angeles County. In addition to describing the expansion of register, this paper provides an overview of an ongoing investigation of 605 twin pairs who are participating in a longitudinal study of behavioral problems during childhood and adolescence. Characteristics of the twins and their families are presented, indicating baseline rates of conduct problems, depression and anxiety disorders, and ADHD diagnoses which are comparable to non-twins in this age range.

Suggested Citation

Baker, Laura A. and Barton, Mafalda and Lozano, Dora I. and Raine, Adrian and Fowler, James H., The Southern California Twin Register at the University of Southern California: II. Twin Research and Human Genetics, Vol. 9, No. 6, pp. 1-8, December 2006. Available at SSRN: https://ssrn.com/abstract=1008007

Laura A. Baker

University of Southern California - Department of Psychology ( email )

Los Angeles, CA 90089-1061
United States

Mafalda Barton

University of Southern California - Department of Psychology ( email )

Los Angeles, CA 90089-1061
United States

Dora I. Lozano

University of Southern California - Department of Psychology ( email )

Los Angeles, CA 90089-1061
United States

Adrian Raine

University of Southern California - Department of Psychology ( email )

Los Angeles, CA 90089-1061
United States

James H. Fowler (Contact Author)

UC San Diego Division of Social Sciences ( email )

9500 Gilman Drive
Code 0521
La Jolla, CA 92093-0521
United States

HOME PAGE: http://jhfowler.ucsd.edu

UC San Diego School of Medicine ( email )

9500 Gilman Drive
MC 0507
La Jolla, CA 92093
United States

HOME PAGE: http://jhfowler.ucsd.edu

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