The present investigation evaluated the utility of classroom-based functional and adjunctive assessments of problem behaviors for 2 adolescents who met diagnostic criteria for attention deficit hyperactivity disorder (ADHD) and comorbid oppositional defiant disorder (ODD). For children with ADHD-ODD, environmental classroom variables, when systematically manipulated by teachers, were related to...

Parents of children with autism spectrum disorders (ASD) experience very heightened levels parenting stress. Symptoms ASD, attention deficit hyperactivity disorder (ADHD), and oppositional defiant (ODD) vary in diagnosed ASD. The current study examined ADHD, ODD symptoms an ASD sample through a hierarchical linear regression to determine which accounted for the greatest proportion unshared vari...

We review recent research on the prevalence, causes, and effects of diagnostic comorbidity among the most common groups of child and adolescent psychiatric disorders; anxiety disorders, depressive disorders, attention deficit hyperactivity disorders, oppositional defiant and conduct disorders, and substance abuse. A meta-analysis of representative general population studies provides estimates o...

Given the relative lack of research on the comorbidity of anxiety disorders (ADs) and conduct problems (oppositional defiant disorder, conduct disorder) in youth, we examine this comorbidity from both basic and applied perspectives. First, we review the concept of comorbidity and provide a framework for understanding issues pertaining to comorbidity. Second, we examine the comorbidity of ADs an...

Attention deficit hyperactivity disorder (ADHD) is associated with multiple neuropsychological deficits and the present study aimed to investigate to what extent these deficits are related to the functional impairments associated with the disorder. The results showed that all executive functioning deficits and reaction time variability acted as mediators in the relation between ADHD and academi...

On average, 15% of young children, 2-8 years of age in the United States have a parent-reported mental, behavioral, or developmental disorder (MBDD) diagnosis, which includes attention-deficit/hyperactivity disorder (ADHD), depression, anxiety problems, behavioral or conduct problems such as oppositional defiant disorder or conduct disorder, Tourette syndrome, autism spectrum disorder, learning...

Cerebrotendinous xanthomatosis (CTX) is a rare inborn disorder of sterol storage with autosomal recessive inheritance and a variable clinical presentation. We describe two siblings with an early psychiatric presentation of CTX-associated attention-deficit/hyperactivity disorder and oppositional defiant disorder, also associated with a mild intellectual disability and major behavioral impairment...