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Heritability of type A behavior.

R H Rahe, L Hervig, R H Rosenman

    Psychosomatic Medicine
    |October 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Type A behavior, a pattern linked to heart disease, was found to be nonheritable when assessed by interview. However, psychological tests correlating with Type A behavior showed genetic influence, suggesting alternative assessment methods.

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    Area of Science:

    • Behavioral Genetics
    • Psychology
    • Cardiovascular Health

    Background:

    • Type A behavior is a pattern associated with increased risk of coronary heart disease.
    • Understanding the genetic and environmental influences on Type A behavior is crucial for public health.
    • Previous research has explored the heritability of various behavioral patterns.

    Purpose of the Study:

    • To estimate the heritability of Type A behavior in middle-aged American males.
    • To compare the heritability of Type A behavior assessed via interview versus psychological tests.
    • To identify potential assessment methods for Type A behavior that may be free from genetic influence.

    Main Methods:

    • Study included 93 pairs of monozygotic twins and 97 pairs of dizygotic twins.

    Related Experiment Videos

  • Type A behavior was assessed using a standard interview.
  • Participants completed four psychological test batteries: Thurstone Temperament Schedule, Jenkins Activity Survey, California Psychological Inventory, and Gough Adjective Check List.

    • Main Results:

    • Type A behavior, as measured by interview, demonstrated nonheritable characteristics.
    • Psychological test scales significantly correlated with Type A behavior generally yielded significant heritability estimates.
    • Gough Adjective Check List scales, despite correlating with Type A behavior, showed nonsignificant heritability.

    Conclusions:

    • The interview assessment of Type A behavior appears to be largely influenced by environmental factors.
    • Certain psychological measures may capture genetically influenced components related to Type A behavior.
    • Specific items from the Gough Adjective Check List could potentially be used to assess Type A behavior independently of genetic predisposition.