Research and clinical investigations in psychiatry largely rely on the de facto assumption
that the diagnostic categories identified in the Diagnostic and Statistical Manual (DSM) …

Neurocognitive heterogeneity is increasingly recognized as a valid phenomenon in ADHD,
with most estimates suggesting that executive dysfunction is present in only about 33 …

The science of attention‐deficit/hyperactivity disorder (ADHD) is motivated by a translational
goal–the discovery and exploitation of knowledge about the nature of ADHD to the benefit of …

Importance Psychiatric nosology is limited by behavioral and biological heterogeneity within
existing disorder categories. The imprecise nature of current nosologic distinctions limits …

Few if any experts believe that existing psychiatric diagnostic categories included in DSM
and ICD are actually discrete disease entities. Attention-deficit/hyperactivity disorder (ADHD) …

Background Previous research on the etiology of ADHD symptoms suggests that
neuropsychological differences may be present as early as birth; however, the diagnosis is …

Background: We reviewed systematically the results of genetic studies investigating
associations between putative susceptibility genes for attention-deficit hyperactivity disorder …

Objective: Despite a prevailing assumption that adult ADHD is a childhood-onset
neurodevelopmental disorder, no prospective longitudinal study has described the …

BACKGROUND: Emerging neuroscientific and genetic findings emphasize the dimensional
rather than the categorical aspects of psychiatric disorders. However, the integration of …

Background Attention‐deficit/hyperactivity disorder (ADHD) is a heterogeneous condition for
which multiple efforts to characterize brain state differences are underway. The objective of …