Adia N Onyango

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Assessing impairment is an explicit component of current psychiatric diagnostic systems. A brief parent and teacher rating scale for assessing impairment was developed and studied using attention deficit hyperactivity disorder (ADHD) as an exemplar disorder. The psychometric properties of the Impairment Rating Scale (IRS) were measured in 4 samples. Two(More)
OBJECTIVE Methylphenidate (MPH), the most commonly prescribed drug for attention-deficit/hyperactivity disorder (ADHD), has a short half-life, which necessitates multiple daily doses. The need for multiple doses produces problems with medication administration during school and after-school hours, and therefore with compliance. Previous long-acting(More)
OBJECTIVE 1) To compare standard twice-daily methylphenidate (MPH) dosing with a single morning dose of MPH and of Adderall during a typical school-day time period, and 2) to conduct a dose-response study of the effects of a late-afternoon (3:30 PM) dose of MPH and Adderall on evening behavior and side effects. DESIGN Within-subject, placebo-controlled,(More)
OBJECTIVE Very little research has focused on the efficacy of Adderall (Shire-Richwood Inc, Florence, KY) in the treatment of children with attention-deficit/hyperactivity disorder (ADHD), and no studies have compared it with standardized doses of Ritalin (Novartis Pharmaceuticals, East Hanover, NJ). It is thought that Adderall has a longer half-life than(More)
OBJECTIVE This was a multicenter, double-blind, randomized, dose-ranging study of a methylphenidate (MPH) transdermal system (MTS). Medication (placebo, 0.45, 0.9, and 1.8 mg/h) was crossed with application time (6 a.m., 7 a.m.) to evaluate MTS efficacy and influence of exposure time on morning effects. METHOD The study took place in a summer treatment(More)
OBJECTIVE This study compared the unique and combined effects of evidence-based treatments for ADHD-stimulant medication and behavior modification-on children's rates of reinforcement for deviant peer behavior (RDPB). METHOD Using a within-subjects design, 222 elementary school-age children attending a summer treatment program, including 151 children with(More)
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