Hanna J T Swaab-Barneveld

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Although it has frequently been reported that hyperactive children have abnormally small P3 amplitudes of the event-related potential (ERP), which are normalized by the stimulant drug methylphenidate (MPH), the literature is inconsistent concerning earlier ERP waves. The aim of the present study was to investigate whether the normalizing effect of a 10-mg(More)
OBJECTIVE To examine the pattern of individual responses to to methylphenidate (MPH) in children with attention-deficit hyperactivity disorder and to examine factors that predict drug response. METHOD Individual drug response was defined on the basis of changes on the Abbreviated Conners Rating Scales completed by parents and teachers. These scales were(More)
BACKGROUND Deficits in executive functioning are supposed to have a predisposing influence on impulsive or aggressive behaviour. We tested the hypothesis that oppositional-defiant disorder (ODD) children with or without attention deficit hyperactivity disorder (ADHD) have problems in executive functioning. METHOD Seventy-seven 7- to 12-year-old children(More)
The hypothesis was tested that weak theory of mind (ToM) and/or emotion recognition (ER) abilities are specific to subjects with autism. Differences in ToM and ER performance were examined between autistic (n = 20), pervasive developmental disorder-not otherwise specified (PDD-NOS) (n = 20), psychiatric control (n = 20), and normal children (n = 20). The(More)
OBJECTIVE To investigate whether a deficient response inhibition is a cognitive endophenotype of attention-deficit/hyperactivity disorder (ADHD). The authors hypothesized that nonaffected siblings of ADHD probands would have a response inhibition between that of ADHD probands and normal controls, although they resembled the controls at a behavioral level.(More)
OBJECTIVE To increase knowledge of the diversity and specificity of sustained attention deficits in children with attention-deficit hyperactivity disorder (ADHD), with special reference to the issue of distinguishing between children with ADHD and children with other psychiatric diagnoses. METHOD A visual sustained attention task was used to compare 52(More)
The aim of this study was to further refine the cognitive phenotype of attention-deficit/hyperactivity disorder (ADHD), with respect to the ability to sustain attention and executive functioning. Participants were 34 boys with ADHD (combined type) and 28 normal controls. The groups were closely matched for age and IQ. All participants were 12 years of age.(More)
The purpose of this study was to examine the efficacy and side-effects of pindolol, a beta-blocker, in children with attention-deficit hyperactivity disorder (ADHD). Fifty-two ADHD children, 7-13 years old, participated in a prospective double-blind placebo-controlled comparison of pindolol and methylphenidate (MPH). Active treatment was pindolol and MPH:(More)
AIM To examine social information processing in children and adolescents with neurofibromatosis type 1 (NF1). METHOD Thirty-two children with NF1 (12 males, 20 females; mean age 12y 4mo, SD 4y) and 32 comparison children (12 males, 20 females; mean age 13y 1mo, SD 3y 11mo) completed face recognition, identification of facial emotions (IFE), and matching(More)
This study examined whether children exposed to prenatal smoking show deficits in "hot" and/or "cool" executive functioning (EF). Hot EF is involved in regulation of affect and motivation, whereas cool EF is involved in handling abstract, decontextualized problems. Forty 7 to 9-year-old children (15 exposed to prenatal smoking, 25 non-exposed) performed two(More)