Twins, families, and the psychology of individual differences: The legacy of Steven G. Vandenberg

Zonderman, Alan B.

doi:10.1007/bf01065476

Cited by 3 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Louisville Twin Study began in the 1950s as the first longitudinal twin and family study to shed light on the heritability of rates of growth and age-related changes in physical, cognitive, and psychological development (Zonderman, 1986). Twins and their parents (as well as siblings) were recruited through Board of Health records in Louisville, Kentucky, with efforts made to recruit families representative of Louisville’s socioeconomic demography.…”

Section: Methodsmentioning

confidence: 99%

“…The LTS also consists of the most intensively studied group of twins over time (Wilson, 1983), with full cognitive testing of twins from the ages of 3 months to 15 years (Eaves, Long, & Heath, 1986; McArdle, 1986; Wilson, 1986; Zonderman, 1986). With the recent resuscitation of the LTS, we have reanalyzed the FSIQ data using a reciprocal effects modeling framework (Dickens & Flynn, 2001) to explain whether the accumulation of gene-environment correlation via a phenotype to environment (P=>E) transmission process drives twins’ divergence in mean ability level over time.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Twin Differentiation of Cognitive Ability Through Phenotype to Environment Transmission: The Louisville Twin Study

et al. 2015

View full text Add to dashboard Cite

The Louisville Twin Study is one of the most intensive twin studies of cognitive ability. The repeated measurements of the twins are ideal for testing developmental twin models that allow for the accumulation of gene-environment correlation via a phenotype to environment (P=>E) transmission process to explain twins’ divergence in mean ability level over time. Using full-scale IQ scores from 566 pairs of twins (MZ=278; DZ=288), we tested whether a P=>E transmission model provided better representation of actual developmental processes than a genetic simplex model. We also addressed whether the induced gene-environment correlation alters the meaning of the latent nonshared environmental factors with a simple numerical method for interpreting nonshared environmental factors in the context of P=>E transmission. The results suggest that a P=>E model provided better fit to twins’ FSIQ data than a genetic simplex model and the meaning of the nonshared environment was preserved in the context of P=>E.

show abstract

Section: Methodsmentioning

confidence: 99%