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  • Title: Aetiology of the relationship between callous-unemotional traits and conduct problems in childhood.
    Author: Viding E, Frick PJ, Plomin R.
    Journal: Br J Psychiatry Suppl; 2007 May; 49():s33-8. PubMed ID: 17470941.
    Abstract:
    BACKGROUND: A callous and unemotional disposition is an indicator of early-onset antisocial behaviour. AIMS: To investigate the extent to which genetic influences contribute to the overlap between callous-unemotional traits and conduct problems in a large population sample of 7-year-old twins. METHOD: Teachers provided ratings of callous-unemotional traits and conduct problems for 3434 twin pairs from the Twins Early Development Study. Model-fitting analyses were performed across the continuum of scores and at the extremes. RESULTS: The phenotypic relationship was primarily genetically mediated, both across the continuum and at the extremes and was substantial. CONCLUSIONS: At 7 years of age, genetic influences on callous-unemotional traits overlap substantially with genetic influences on conduct problems. This combination should guide selection criteria in future molecular genetic studies.
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