Background Heightened motor activity is a hallmark of attention‐deficit/hyperactivity disorder
(ADHD), yet high activity levels are also often reported in young children with autism …

ADHD presents a serious community-health problem through its links to a wide range of
negative outcomes. These outcomes are exacerbated when ADHD symptoms co-occur with …

BackgroundAttention-deficit/hyperactivity disorder (ADHD) is proposed to be a
neuropsychologically heterogeneous disorder that encompasses two distinct sub-groups …

To enhance the understanding of how symptoms of attention-deficit/hyperactivity disorder
(ADHD) and disruptive behavior disorders such as oppositional defiant disorder (ODD) …

Given diverse symptom expression and high rates of comorbid conditions, the present study
explored underlying commonalities among OCD-affected children and adolescents to better …

Efforts to parse ADHD's heterogeneity in the DSM system has generally relied on subtypes,
or presentations, based on different symptom combinations. Promising recent work has …

The present study sought to refine knowledge about the structure underlying externalizing
dimensions. From a “top-down” ICD/DSM-based perspective, externalizing symptoms can …

Background This exploratory proof of principle study examined the extent to which behavior
problems represent a functional characteristic that crosses diagnostic boundaries. Methods …

OBJECTIVES: Autism spectrum disorder (ASD) is highly heterogeneous, with phenotypic
variability and behavioural complexity greatest within higher-functioning individuals without …

Reports the retraction of" How Does ASD Symptomology Correlate With ADHD
Presentations" by MJ Konst, JL Matson, R. Goldin and R. Rieske (Research in …