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Twins: early mental development.

R S Wilson

    Science (New York, N.Y.)
    |February 25, 1972
    PubMed
    Summary
    This summary is machine-generated.

    Infant twins show high similarity in mental development, with genetic factors playing a primary role. Environmental influences appear supportive rather than determinative in early childhood development.

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    Area of Science:

    • Developmental Psychology
    • Behavioral Genetics
    • Pediatric Research

    Background:

    • Understanding the interplay between genetics and environment in early childhood development is crucial.
    • Twin studies provide a unique model for disentangling genetic and environmental influences on developmental trajectories.

    Purpose of the Study:

    • To investigate the concordance of mental development in infant twins during their first two years.
    • To assess the relative contributions of genetic and environmental factors to infant mental development patterns.

    Main Methods:

    • Periodic appraisal of mental development in infant twins.
    • Comparison of within-pair concordance rates for monozygotic and dizygotic twins.
    • Analysis of developmental trajectories, including spurts and lags.

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    Main Results:

    • High within-pair concordance for the level of mental development was observed in infant twins.
    • Twins exhibited concordant patterns in developmental spurts and lags, with higher concordance in monozygotic twins.
    • Results suggest a strong genetic influence on early mental development.

    Conclusions:

    • Infant mental development is primarily shaped by the genetic blueprint.
    • Environmental factors generally serve a supportive role, with significant deviations occurring only in exceptional circumstances.