Working memory impairments in children with attention-deficit hyperactivity disorder with and without comorbid language learning disorders.
J Clin Exp Neuropsychol
; 28(7): 1073-94, 2006 Oct.
Article
em En
| MEDLINE
| ID: mdl-16840237
ABSTRACT
Our objectives were to examine whether children with attention-deficit hyperactivity disorder (ADHD) are impaired on one or more components of working memory (WM) independent of comorbid language learning disorders, and whether WM impairments are more strongly related to symptoms of inattention than to symptoms of hyperactivity-impulsivity. Four groups of children participated ADHD (n = 62); ADHD+RD/LI (n = 32); RD/LI (n = 15); and a typically developing comparison group (n = 34). Four simple and brief measures of WM were used that varied in modality (auditory-verbal; visual-spatial) and processing demands (temporary storage versus manipulation of information). Children with ADHD without comorbid language learning disorders exhibited deficits in visual-spatial storage and verbal and visual-spatial central executive (C.E.) functions that were independent of comorbid psychiatric disorders. Children with language learning disorders, regardless of comorbidity with ADHD, exhibited impairments in both verbal and spatial storage as well as C.E. domains of WM. Symptoms of inattention, but not symptoms of hyperactivity/impulsivity, predicted performance on verbal and visual-spatial C.E. measures independent of age, verbal cognitive ability, and reading and language performance. Findings are consistent with data implicating neuropsychological impairments in ADHD. The dimensional results are also consistent with prior research demonstrating the neuropsychological impairments are more strongly associated with the inattention symptom dimension than with the hyperactive-impulsive dimension.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transtorno do Deficit de Atenção com Hiperatividade
/
Aprendizagem Verbal
/
Deficiências da Aprendizagem
/
Transtornos da Memória
/
Memória de Curto Prazo
Tipo de estudo:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Child
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Clin Exp Neuropsychol
Assunto da revista:
NEUROLOGIA
/
PSICOLOGIA
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Canadá