This study compared children with ADHD-only, ADHD+ODD and normal controls (age 8-12) on three key neurocognitive functions: response inhibition, reinforcement sensitivity, and temporal information processing. The goal was twofold: (a) to investigate neurocognitive impairments in children with ADHD-only and children with ADHD+ODD, and (b) to test…

Fifteen children with ADHD aged 8 to 12 years and age and gender matched controls performed two different stopping tasks to examine response performance and inhibition and their respective moment-to-moment variability. One task was the well-established stop-signal task, while the other was a novel tracking task where the children tracked a…

Examines rapid-tapping performance of 36 hyperkinetic and 36 control boys under conditions of free response, verbal urging, and penny rewards. Hyperkinetics were unable to adjust to changing incentive conditions. (Author/EK)

Thirteen preschool and first-grade hyperactive boys performed worse on communication tasks providing detailed cues only and responded more impulsively on tasks requiring additional cues than did 13 controls. Problems with detailed cues were not attributable to overall differences between groups in motivation, information requesting, processing…

Administered Luria-Nebraska Neuropsychological Battery--Children's Revision (LNNB-CR) to 54 clinic-referred children aged 8-12 years. Compared children reliably diagnosed as attention deficit disorder (ADD) with hyperactivity, without hyperactivity, and control group with internalizing disorders. Findings failed to support hypothesis that ADD is…

Aim: Deficits in timing and sequencing behaviour in children with dyslexia and with attention-deficit hyperactivity disorder have already been identified. However many studies have not controlled for comorbidity between dyslexia and ADHD. This study investigated timing performance of children with either dyslexia or ADHD, or ADHD + dyslexia or…

Performance on tasks of memory and of attention was consistently interrelated for nonlearning disabled children and less consistently so for learning disabled subjects. Hyperactivity was also related to poorer performance on the cognitive measures. (Author/DB)

A study of three elementary school boys (ages 8-11) with attention deficit hyperactivity disorder, who were already receiving pharmacological treatment, investigated the effects of using a self-monitoring procedure to enhance their on-task behavior. Results found all three subjects increased in on-task behaviors when self-monitoring was used.…

This study examined the hypothesis that focusing attention away from external stimulation and on the self might improve the task performance of students with attention deficit/hyperactivity disorder. Forty-three middle school students, (12 with hyperactivity, 4 without hyperactivity but inattention, and 27 without either attention deficit disorder…

Research supported by U.S. Public Health Grant No. 293-60 to D.O. Hebb and Grant No. 298-3980 of the Medical Research Council of Canada to Virginia I. Douglas. Part of a PhD thesis submitted to McGill University (Friebergs, 1965).

This study examined response to treatment with methylphenidate (Ritalin) across 6 measures of cognitive, academic, and social functioning in 71 boys (ages 7-11) with attention deficit hyperactivity disorder. Response ranged from 18 percent to 71 percent across the six measures, suggesting that classifying a child as a responder to methylphenidate…