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Transient environmental effects detected in sibling correlations

C Bouchard

    Annals of Human Biology
    |January 1, 1980
    PubMed
    Summary

    Detecting environmental influences on sibling correlations is challenging. This study proposes a new method using socio-economic indicators to identify environmental effects on traits in 10-year-old siblings.

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    Area of Science:

    • Behavioral genetics
    • Human biology
    • Environmental science

    Background:

    • Detecting environmental effects on sibling correlations is complex.
    • Previous research suggested age difference reveals transient environmental effects.
    • An alternative method for detecting environmental influences is proposed.

    Purpose of the Study:

    • To investigate a novel method for detecting environmental effects by controlling for socio-economic indicators.
    • To assess the sensitivity of this method in identifying environmental influences on various traits in siblings.

    Main Methods:

    • Correlations were calculated for 12 variables in 208 pairs of 10-year-old French-Canadian siblings.
    • Socio-economic indicators were used to partial out environmental effects from sibling correlations.
    • Statistical analysis was performed to determine significant changes in correlations.

    Main Results:

    • Partialing out socio-economic indicators significantly altered correlations for three skeletal measurements.
    • Significant changes were also observed for body weight and triceps skinfold measurements.
    • The findings differ from previous research on sibling correlations and age differences.

    Conclusions:

    • The proposed method demonstrates sensitivity in detecting environmental effects on specific traits.
    • Controlling for socio-economic indicators can reveal environmental influences not apparent through age-based analyses.
    • This approach may offer a viable tool for environmental effect detection in behavioral and biological studies.

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