Abstract:
:Approximately 5% of children are affected by attention-deficit/hyperactivity disorder (ADHD), and more boys are affected than girls. This study examined the magnitude of genetic and environmental influences on ADHD and several questions regarding sex differences in its prevalence and liability. The participants were 2,391 twin and sibling pairs from Australia, ages 3-18. ADHD symptoms in the general population were highly heritable (h2 = .85-.90), as were deviant ADHD scores in the selected population. The magnitude of familial influences was similar for boys and girls, although there were shared environmental influences on ADHD in girls but not boys and dominance genetic influences on ADHD in boys but not girls. Specific genetic and environmental influences were highly similar for boys and girls. Evidence supported the polygenic multiple threshold model rather than the constitutional variability model of sex differences in ADHD.
journal_name
J Abnorm Psycholjournal_title
Journal of abnormal psychologyauthors
Rhee SH,Waldman ID,Hay DA,Levy Fdoi
10.1037/0021-843X.108.1.24keywords:
subject
Has Abstractpub_date
1999-02-01 00:00:00pages
24-41issue
1eissn
0021-843Xissn
1939-1846pii
1999-00603-003journal_volume
108pub_type
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更新日期:1994-11-01 00:00:00
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journal_title:Journal of abnormal psychology
pub_type: 杂志文章
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更新日期:1999-08-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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