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  • Title: A twin study of competence and problem behavior in childhood and early adolescence.
    Author: Edelbrock C, Rende R, Plomin R, Thompson LA.
    Journal: J Child Psychol Psychiatry; 1995 Jul; 36(5):775-85. PubMed ID: 7559844.
    Abstract:
    The Child Behavior Checklist (CBCL) was completed by parents of 181 pairs of same-sex twins ages 7-15 (mean age = 11.0 years). Correlations between scores on the CBCL scales for 99 pairs of monozygotic twins and 82 pairs of dizygotic twins indicated significant genetic influences that varied according to the specific area of competence and problem behavior. Model-fitting estimates derived from multiple regression analyses indicated significant genetic influence on competence in school and on all areas of problem behavior. In addition, significant shared environmental influence was detected for amount and quality of participation in activities, quality of social relationships, performance in school, anxiety/depression, and delinquent behaviour. Implications for future work on the mechanisms underlying these effects are discussed.
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