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    Working memory, processing speed, and set-shifting in children with developmental coordination disorder and attention-deficit-hyperactivity disorder

    Access Status
    Open access via publisher
    Authors
    Piek, Jan
    Dyck, Murray
    Francis, Mona
    Conwell, Alistair
    Date
    2007
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Piek, Jan and Dyck, Murray and Francis, Mona and Conwell, Alistair. 2007. Working memory, processing speed, and set-shifting in children with developmental coordination disorder and attention-deficit-hyperactivity disorder. Developmental Medicine and Child Neurology 49 (9): pp. 678-683.
    Source Title
    Developmental Medicine and Child Neurology
    DOI
    10.1111/j.1469-8749.2007.00678.x
    ISSN
    00121622
    Faculty
    Faculty of Health Sciences
    School of Psychology
    URI
    http://hdl.handle.net/20.500.11937/3606
    Collection
    • Curtin Research Publications
    Abstract

    It has been suggested that the high levels of comorbidity between attention-deficit-hyperactivity disorder (ADHD) and developmental coordination disorder (DCD) may be attributed to a common underlying neurocognitive mechanism. This study assessed whether children with DCD and ADHD share deficits on tasks measuring working memory, set-shifting, and processing speed. A total of 195 children aged between 6 years 6 months and 14 years 1 month (mean 10y 4mo [SD 2y 2mo]) were included in this study. A control group (59 males, 79 females), a DCD group (12 males, six females), an ADHD-predominantly inattentive group (16 males, four females), and an ADHD-combined group (15 males, four females), were tested on three executive functioning tasks. Children with DCD were significantly slower on all tasks, supporting past evidence of a timing deficit in these children. With few exceptions, children with ADHD did not perform more poorly than control children. These findings demonstrate the importance of identifying children with motor deficits when examining tasks involving a timing component.

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