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Do Attention Deficits Influence IQ Assessment in Children and Adolescents With ADHD?
Jens Richardt M. Jepsen, MSc*,
Birgitte Fagerlund, Ph.D.,
and
Erik Lykke Mortensen, MSc
Copenhagen University Hospital
* To whom correspondence should be addressed. E-mail: jrj01{at}bbh.regionh.dk.
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Abstract |
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Objective: The aim was to characterize the relationship between IQ and attention deficits in children with ADHD and to estimate the inattention-related mean influence on IQ when children are tested before stimulant drug treatment has been initiated. Method: Studies of various methodologies are reviewed. Results: Correlation studies show mostly weak associations between IQ scores and attention deficits. Meta-analyses report the average short-term stimulant treatment effect on IQ in children with ADHD to be 2 to 7 IQ points. Conclusion: The associations between IQ and attention deficits in ADHD are generally modest, with the mean influence on IQ probably amounting to 2 to 5 IQ points. This may serve as a benchmark when clinicians interpret the validity of IQ in this clinical population. (J. of Att. Dis. XXXX; XX(X) xx-xx)
First published on September 24, 2008, doi:10.1177/1087054708322996
Journal of Attention Disorders 2009;12:551.
A more recent version of this article appeared on May 1, 2009

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