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Temperament in early childhood

D C Rowe, R Plomin

    Journal of Personality Assessment
    |April 1, 1977
    PubMed
    Summary

    This study compared temperament theories, finding the EASI model

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    Area of Science:

    • Child Psychology
    • Developmental Psychology
    • Behavioral Genetics

    Background:

    • The New York Longitudinal Study (NYLS) proposed a nine-dimensional temperament structure.
    • Buss and Plomin developed the EASI temperament theory (Emotionality, Activity, Sociability, Impulsivity).
    • Comparing these models is crucial for understanding childhood temperament.

    Purpose of the Study:

    • To compare the NYLS temperament structure with the EASI temperament theory.
    • To develop an objective inventory for NYLS temperaments.
    • To merge the two systems into a unified instrument.

    Main Methods:

    • Developed an objective inventory for NYLS temperaments.
    • Mothers rated 182 children on both NYLS and EASI temperaments.
    • Factor analysis was used to evaluate the NYLS dimensions.

    Main Results:

    • Only two NYLS dimensions (attention span-persistence, distractibility) were supported by factor analysis.
    • The four EASI dimensions were replicated.
    • A shared sociability factor was identified, but other temperaments differed.

    Conclusions:

    • The EASI model demonstrated stronger empirical support in this study.
    • Temperament assessment requires robust, validated instruments.
    • The study led to the creation of the Colorado Childhood Temperament Inventory for children aged 1-6.

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