A widely used statistical method to test for genetic association is the transmission
disequilibrium test (TDT) using two parent–proband trios. West et al 1 have presented …

The transmission disequilibrium test (TDT) is widely used as a robust statistical method to
test for genetic association due to linkage based upon analysis of parent-proband trios. The …

One of the most replicated findings in studies of attention-deficit/hyperactivity disorder
(ADHD) is its very high heritability, which averages approximately 75% across 20 twin …

Attention deficit hyperactivity disorder (ADHD) is a common neurobehavioral problem
afflicting 5–10% of children and adolescents and persisting into adulthood in 30–50% or …

Attention deficit/hyperactivity disorder (ADHD) is among the most common childhoodonset
psychiatric disorders. The worldwide prevalence of ADHD in children is 8% to 12%, 1 and …

OBJECTIVE: To identify subtypes of attention-deficit/hyperactivity disorder (ADHD) and
characterize them as either categorical or continuous, to investigate tamilial resemblance for …

Attention deficit hyperactivity disorder (ADHD) is a common condition of childhood the
symptoms of which include inattention, excessive motor activity, inpulsivity and distractibility …

Background: Findings from family and twin‐based studies of Attention Deficit/Hyperactivity
Disorder (ADHD) have indicated that inattentive and combined subtypes cluster together …

OBJECTIVE: To describe the utility of twin studies for attention-deficit/hyperactivity disorder
(ADHD) research and demonstrate their potential for the identification of alternative …

Objective Twin studies and genome-wide complex trait analysis (GCTA) are not in
agreement regarding heritability estimates for behavioral traits in children from the general …