Common Genetic but Specific Environmental Influences for Aggressive and Deceitful Behaviors in Preadolescent Males |
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Authors: | Edward D Barker Henrik Larsson Essi Viding Barbara Maughan Fruhling Rijsdijk Nathalie Fontaine Robert Plomin |
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Institution: | 1.Department of Psychology, Center for the Prevention of Youth Behavior Problems,University of Alabama,Tuscaloosa,USA;2.Institute of Psychiatry, King’s College London, Social, Genetic and Developmental Psychiatry Centre,London,UK;3.Department of Medical Epidemiology and Biostatistics,Karolinska Institutet,Stockholm,Sweden;4.Research Department of Clinical, Educational and Health Psychology, Division of Psychology and Language Sciences,University College London,London,UK;5.Department of Psychology,Université Laval,Québec City,Canada |
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Abstract: | Although both aggressive (AGG) and deceitful behaviors (DEC) are symptoms of childhood conduct problems, few studies have
examined common vs. specific etiological influences. Early intervention is encouraged for conduct problems and findings from
genetically informative studies can suggest whether interventions should focus on conduct problems in general or groupings
of conduct problems more specifically. Twin model-fitting analyses were conducted on same and different teacher ratings of
AGG and DEC for 872 9-year old male twin pairs. Common genetic influences were found to underlie the susceptibility for both
AGG and DEC. The same teacher ratings resulted in somewhat higher heritability estimates than different teacher ratings. Results
also indicated stronger environmental effects for DEC as compared with AGG, with a significant shared environmental component
for same teachers and a substantial non-shared environmental component for different teachers. Our data suggest that AGG and
DEC share risk genes and environmental factors may differentiate these two types of conduct problems. Characterizing these
specific environmental factors may be useful when developing interventions. |
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