Genetic and environmental influences on impulsivity: A meta-analysis of twin, family and adoption studies

S Bezdjian, LA Baker, C Tuvblad - Clinical psychology review, 2011 - Elsevier
A meta-analysis of twin, family and adoption studies was conducted to estimate the
magnitude of genetic and environmental influences on impulsivity. The best fitting model for …

Genetic and environmental influences on ADHD symptom dimensions of inattention and hyperactivity: a meta-analysis.

MA Nikolas, SA Burt - Journal of abnormal psychology, 2010 - psycnet.apa.org
Behavioral genetic investigations have consistently demonstrated large genetic influences
for the core symptom dimensions of attention-deficit/hyperactivity disorder (ADHD), namely …

Age-related changes in heritability of behavioral phenotypes over adolescence and young adulthood: a meta-analysis

SE Bergen, CO Gardner, KS Kendler - Twin Research and Human …, 2007 - cambridge.org
The relative proportions of genetic and environmental variance in behavioral measures
have been studied extensively. A growing body of literature has examined changes in …

ADHD genetics: 2007 update

J Elia, M Devoto - Current psychiatry reports, 2007 - Springer
Attention-deficit/hyperactivity disorder (ADHD) is highly heritable. Confirmed association has
been reported for several candidate genes, including DAT1, DRD4, SNAP-25, DRD5, 5HTT …

An examination of the behavioral and neuropsychological correlates of three ADHD candidate gene polymorphisms (DRD4 7+, DBH TaqI A2, and DAT1 40 bp VNTR) …

RA Barkley, KM Smith, M Fischer… - American Journal of …, 2006 - Wiley Online Library
Several candidate gene polymorphisms have been implicated in attention deficit
hyperactivity disorder (ADHD), including DAT1 40bp VNTR, DRD4 7+, and DBH TaqI A2 …

A twin study of attention-deficit/hyperactivity disorder dimensions rated by the strengths and weaknesses of ADHD-symptoms and normal-behavior (SWAN) scale

DA Hay, KS Bennett, F Levy, J Sergeant, J Swanson - Biological psychiatry, 2007 - Elsevier
BACKGROUND: When symptom rating scales are used in the general population, there is
severe skewness, with many individuals having no symptoms. While this has major …

A twin study of the relationships among inattention, hyperactivity/impulsivity and sluggish cognitive tempo problems

S Moruzzi, F Rijsdijk, M Battaglia - Journal of abnormal child psychology, 2014 - Springer
We investigated the etiological relationships between the three ADHD dimensions of
Inattentive Problems (INP), Hyperactivity-Impulsivity Problems (HIP) and Sluggish Cognitive …

A longitudinal twin study on the association between inattentive and hyperactive-impulsive ADHD symptoms

CU Greven, P Asherson, FV Rijsdijk… - Journal of Abnormal Child …, 2011 - Springer
DSM-IV distinguishes two symptom domains of attention deficit hyperactivity disorder
(ADHD): inattentiveness and hyperactivity-impulsivity. The present study examines the …

Predicting substance use in emerging adulthood: A genetically informed study of developmental transactions between impulsivity and family conflict

KK Elam, FL Wang, K Bountress, L Chassin… - Development and …, 2016 - cambridge.org
Deviance proneness models propose a multilevel interplay in which transactions among
genetic, individual, and family risk factors place children at increased risk for substance use …

A genetic study of attention deficit hyperactivity disorder, conduct disorder, oppositional defiant disorder and reading disability: aetiological overlaps and implications

NC Martin, F Levy, J Pieka, DA Hay - International Journal of …, 2006 - Taylor & Francis
Attention Deficit Hyperactivity Disorder (ADHD) commonly co‐occurs with Oppositional
Defiant Disorder, Conduct Disorder and Reading Disability. Twin studies are an important …