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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Behavior genetics 7 (1977), S. 261-271 
    ISSN: 1573-3297
    Keywords: assortative marriage ; assortative mating ; multivariate analysis ; quantitative genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract One hundred and twenty-three spouse pairs gathered as part of a family study of the genetics of special abilities were examined on a battery of ability tests. Four principal components were interpreted after rotation: Spatial, Verbal, Perceptual Speed, and Memory. In addition, the first factor from a common factor analysis (unrotated) was taken as an estimate of g. Assortative marriage was measured by the spouse correlations on the test and factor scores. Three multiple regression models were designed to determine whether phenotypic convergence during marriage occurs and whether resemblance between spouses in cognitive ability is related to fertility. The following independent variables were partialed out in the models: (1) sex and age; (2) sex, age, and length of marriage; and (3) sex, age, and number of children. Model 1 (age and sex) accounted for part of the correlation between spouses on the spatial tests, the verbal tests and the spatial and general factors. The perceptual speed and memory tests and factors were largely unaffected by partialing out the independent variables. No evidence of phenotypic convergence over years of marriage or of a relationship between fertility and resemblance in abilities was found.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-3297
    Keywords: biometrical genetic analysis ; California Psychological Inventory (CPI) ; differential heritability ; personality traits ; twin analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Several biometrical genetic models were fitted to the National Merit Scholarship Qualifying Test (NMSQT) California Psychological Inventory (CPI) data. These models include parameters for an additive genetic effect (D R), an among-families environmental effect (E 2), and a withinfamilies environmental effect (E 1). It is shown that the CPI scales do not fit the same model; the heritabilities, calculated from the parameter estimates of the model fit for each scale, are not the same. Most scales fit a model with parameters for the additive genetic and within-families environmental effects, although the CS and IE scales requireE 2 to achieve fit, and the RE, AI, and FE scales require separate-sexE 1 andE 2 parameters. The SO and CM scales fit none of the models tested. No model could be fit to the SO scale; CM did not fit these models because of apparent gene-environment interaction effects. Similar parameter estimates were found for the models fit to the full sample and the two random subsamples, and the heritabilities calculated from these estimates were quite consistent.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Behavior genetics 16 (1986), S. 11-24 
    ISSN: 1573-3297
    Keywords: twin studies ; family studies ; individual differences ; multivariate analysis ; cognitive abilities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract To honor the retirement of Steven G. Vandenberg, his contributions to multivariate behavioral genetics are reviewed. During Professor Vandenberg's prolific career, he made substantial contributions to three general areas: twin research, family studies, and research on individual differences. In the area of twin research, two large-scale studies, the Hereditary Abilities Study and the Louisville Twin Study, are reviewed. His contributions to the analysis of twin data, with particular reference to the canonical generalization of Bartlett'sF ratio, are also noted. In the area of family studies, Professor Vandenberg was principal or coprincipal investigator of the Boulder Family Study, the Hawaii Family Study of Cognition, the Colorado Adoption Project, and a twin-family study of smoking behavior; his papers on ethnic comparisons, assortative marriage, and kinship analyses are reviewed. In his research on individual differences, Professor Vandenberg conducted studies of the cross-ethnic factorial invariance of primary mental abilities in Chinese and South American students and took an early interest in automated methods for factor analysis. Over the course of his career, Professor Vandenberg has made a variety of tangible and intangible contributions to behavioral genetics, and his personal humility and scientific outlook have provided an important role model for his colleagues and students.
    Type of Medium: Electronic Resource
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