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Preadolescent development: case studies in twins

R A Frank, D J Cohen

    The Yale Journal of Biology and Medicine
    |November 1, 1980
    PubMed
    Summary
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    Puberty triggers psychological shifts in adolescents, impacting twin relationships and parental dynamics. Twin differences in development often persist or intensify, influencing their adjustment and identity formation.

    Area of Science:

    • Developmental Psychology
    • Adolescent Psychology
    • Twin Studies

    Background:

    • Early adolescence is a critical period of psychological change.
    • Puberty onset is linked to significant psychosocial development.
    • Understanding twin dynamics during this phase is crucial.

    Purpose of the Study:

    • To assess psychological changes in early adolescence within healthy twin pairs.
    • To examine the correlation between puberty's biological onset and psychosocial regression.
    • To explore parental reactions to twins' pubertal development.

    Main Methods:

    • Longitudinal case studies of eight sets of healthy twins and their parents.
    • Assessment of twins across physical maturity from prepubertal to late pubertal stages.

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  • Detailed observation of twinship, parental responses, and individual adjustment.

    • Main Results:

    • Psychosocial regression correlates with the biological onset of puberty.
    • Parents exhibited increased conflict, detachment, and pride regarding their twins.
    • More advanced twins led in academic, social, and independent behaviors.
    • Twin relationships generally remained close despite individual divergence.
    • Differences in personality and development within twins tended to persist or increase.
    • Parental identification patterns influenced developmental differences.

    Conclusions:

    • Puberty significantly alters adolescent psychosocial development and twin relationships.
    • Parental reactions are complex, involving conflict, pride, and detachment.
    • Individual differences within twin pairs are often maintained or amplified during adolescence.
    • Longitudinal studies offer valuable insights into adolescent development and family dynamics.