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Heritability of personality disorder traits: a twin study
Author(s) -
Jang K. L.,
Livesley W. J.,
Ver P. A.,
Jackson D. N.
Publication year - 1996
Publication title -
acta psychiatrica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.849
H-Index - 146
eISSN - 1600-0447
pISSN - 0001-690X
DOI - 10.1111/j.1600-0447.1996.tb09887.x
Subject(s) - heritability , twin study , big five personality traits , psychology , personality , clinical psychology , personality assessment inventory , psychiatry , developmental psychology , genetics , social psychology , biology
Genetic and non‐genetic influences on the hierarchy of traits that delineate personality disorder as measured by the Dimensional Assessment of Personality Problems (DAPP‐DQ) scale were examined using data from a sample of 483 volunteer twin pairs (236 monozygotic pairs and 247 dizygotic pairs). The DAPP‐DQ assesses four higher‐order factors, 18 basic dimensions and 69 facet traits of personality disorder. The correlation coefficients for monozygotic and dizygotic twin pairs ranged from 0.26 to 0.56 and from 0.03 to 0.41, respectively. Broad heritability estimates ranged from 0 to 58% (median value, 45%). Additive genetic effects and unique environmental effects emerged as the primary influences on these scales, with unique environmental influences accounting for the largest proportion of the variance for most traits at all levels of the hierarchy.