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Related Experiment Videos

Adoption studies: historical and methodological critique.

R J Cadoret

    Psychiatric Developments
    |January 1, 1986
    PubMed
    Summary
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    Adoption studies help separate genetic and environmental influences on traits like IQ and psychopathology. This research reviews their history, methods, and potential for future discoveries in understanding complex human conditions.

    Area of Science:

    • Behavioral Genetics
    • Psychopathology Research
    • Human Behavioral Biology

    Background:

    • Adoption studies historically separated heredity from environment, initially focusing on IQ.
    • Formalized adoption procedures enabled the adoptee separation paradigm.
    • The technique expanded in the 1960s to investigate genetic influences on psychopathology.

    Observation:

    • Assessed genetic factors in various conditions: alcoholism, criminality, personality disorders, antisocial personality, somatization disorder, affective disorder, hyperactivity, and schizophrenia.
    • Analyzed confounding variables and control methods in adoption research.
    • Addressed major methodological criticisms of adoption studies.

    Findings:

    • Adoption studies are crucial for identifying genetic etiological factors in psychopathology.

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  • The paradigm can precisely delineate environmental influences while controlling for genetic factors.
  • These studies offer valuable insights into the interplay of nature and nurture.

    • Implications:

    • Despite methodological challenges, adoption studies remain a powerful tool in behavioral genetics.
    • Further research using this paradigm holds promise for understanding complex traits and disorders.
    • The 1% adoption rate in Western countries provides a continued opportunity for such investigations.