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Posted
October, 2004
Heritability
of Attention Problems Among Dutch
Twins Assessed Longitudinally at Ages 3, 7, 10, and 12
Various studies
have reported genetic effects on attention problems assessed at
different ages. However, there has been less research on the developmental
course of genetic effects on attention problems. Using data from
the Netherlands Twin Registry, Rietveld et al. (2004) analyzed
preschool CBCL scores obtained at age 3 and school age CBCL scores
obtained at ages 7, 10, and 12 years. Because data were available
for different birth cohorts at the different ages, sample sizes
ranged from 3,124 at age 12 to 11,938 at age 3. However, 2,192
children had complete CBCL data for ages 3, 7, 10, and 12. Structural
equation modeling (SEM) indicated heritabilities of nearly 75%
at each age for both genders. High correlations between scores
from early ages to later ages were attributable mainly to genetic
effects, especially from age 7 to age 12. The authors concluded
that attention problems are highly heritable at all the ages studied,
that the same genes are evidently expressed in both genders, and
that the relative sizes of the genetic and environmental contributions
remain consistent across the ages studied.
Reference:
Rietveld, M.J.H., Hudziak, J.J., Bartels, M., van Beijsterveldt,
C.E.M, & Boomsma, D.I. (2004). Heritability of attention problems
in children: longitudinal results form a study of twins, age 3
to 12. Journal of Child Psychology and Psychiatry, 45,
577-588.
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