Seventeen children previously judged to be good or poor responders to methylphenidate (Ritalin) were tested on sensory integrative measures while in the off-drug state. The tester was unaware of the children's drug response category. Results showed that children who were poor responders to Ritalin showed prolonged scores on and an adverse reaction to the Southern California Postrotary Nystagmus...

The basis of this article is A. R. Luria’s conception of the qualitative approach in neuropsychology. Attention deficit disorder with hyperactivity is one of the most frequent clinical diagnoses given during preschool age. However, precise qualitative neuropsychological criteria for analysis of this clinical diagnosis do not exist and change from one approach to another. Our objective here is t...

In the present study, the effects of 0.3 mg/kg and 1.0 mg/kg of methylphenidate on the overt behavior and academic functioning of 12 children with an established diagnosis of attention deficit disorder with hyperactivity were evaluated. A double-blind, placebo-control, within-subject (crossover) design was used, in which each child was tested four times in each drug condition. Drug conditions w...

Objective: The aim of this study was to examine the types of errors made by youth with and without a parent-reported diagnosis of attention deficit and hyperactivity disorder (ADHD) on a math fluency task and investigate the association between error types and youths' performance on measures of processing speed and working memory. Method: Participants included 30 adolescents with ADHD and 39 ty...

The present study compared the efficacy of ACTH 4-9 analog, methylphenidate, and placebo on attention deficit disorder with 30 (HK) children with attention deficit disorder and psychometric measurements. HK children were randomly placed into three groups, according to body weight, and treated with placebo, methylphenidate, and adrenocorticotropic hormone fractions (ACTH 4-9 analog). The results...

This study involved 30 children with attention deficit disorder with hyperactivity (ADD+H), 14 children with attention deficit disorder without hyperactivity (ADD-H), and 28 clinic control children, with a mean age of 8.1 years, and utilized an extreme groups methodology. The study tested the hypothesis that the teacher-rated social behavior of ADD-H children would be characterized by social wi...

Previous research investigating attention and impulse control in individuals with Attention-Deficit/Hyperactivity Disorder (ADHD) has largely ignored the symptomatic differences among the three subtypes of ADHD: ADHD-Inattentive Type, ADHD-Hyperactive/Impulsive Type, and ADHD-Combined Type. The present study examined attention and impulse control by focusing on these subtypes. Based on their se...

The vast majority of studies that have examined the latent structure of attention deficit/hyperactivity disorder (ADHD) in children and adolescents have concluded that ADHD has a dimensional latent structure. In other words, ADHD symptomatology exists along a continuum and there is no natural boundary or qualitative distinction (i.e., taxon) separating youth with ADHD from those with subclinica...

BACKGROUND A growing body of research has identified abnormal visual information processing in attention-deficit hyperactivity disorder (ADHD). In particular, slow processing speed and increased reliance on visuo-perceptual strategies have become evident. OBJECTIVE The current study used recently developed fMRI methods to replicate and further examine abnormal rightward biased visual informat...