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2017 ; 26
(4
): 469-479
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Psychopathic personality traits in 5 year old twins: the importance of genetic
and shared environmental influences
#MMPMID27683227
Tuvblad C
; Fanti KA
; Andershed H
; Colins OF
; Larsson H
Eur Child Adolesc Psychiatry
2017[Apr]; 26
(4
): 469-479
PMID27683227
show ga
There is limited research on the genetic and environmental bases of psychopathic
personality traits in children. In this study, psychopathic personality traits
were assessed in a total of 1189 5-year-old boys and girls drawn from the
Preschool Twin Study in Sweden. Psychopathic personality traits were assessed
with the Child Problematic Traits Inventory, a teacher-report measure of
psychopathic personality traits in children ranging from 3 to 12 years old.
Univariate results showed that genetic influences accounted for 57, 25, and 74 %
of the variance in the grandiose-deceitful, callous-unemotional, and
impulsive-need for stimulation dimensions, while the shared environment accounted
for 17, 48 and 9 % (n.s.) in grandiose-deceitful and callous-unemotional,
impulsive-need for stimulation dimensions, respectively. No sex differences were
found in the genetic and environmental variance components. The non-shared
environment accounted for the remaining 26, 27 and 17 % of the variance,
respectively. The three dimensions of psychopathic personality were moderately
correlated (0.54-0.66) and these correlations were primarily mediated by genetic
and shared environmental factors. In contrast to research conducted with
adolescent and adult twins, we found that both genetic and shared environmental
factors influenced psychopathic personality traits in early childhood. These
findings indicate that etiological models of psychopathic personality traits
would benefit by taking developmental stages and processes into consideration.
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