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Journal of Attention Disorders
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*Attention Deficit Hyperactivity Disorder
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Article

Distinct Response Time Distributions in Attention Deficit Hyperactivity Disorder Subtypes

Laurent Querne and Patrick Berquin*

* To whom correspondence should be addressed. E-mail: berquin.patrick{at}chu-amiens.fr.


  Abstract
Objective To address the issue of response time (RT) profiles in hyperactive-impulsive (ADHD-HI), inattentive (ADHD-IA), and combined (ADHD-C) subtypes of ADHD. We hypothesized that children with ADHD-HI should respond more rapidly than children without ADHD and children with ADHD-IA and ADHD-C should respond more slowly than children without ADHD. Method: Four groups (3 ADHD groups and 1 non-ADHD group) each composed of 16 children (7-13 years old) performed a visuospatial choice task. Results: ANOVA indicated very variable RTs for each ADHD subtype when controlling for individual RT. ANOVA performed on RT distribution showed significant differences between the ADHD and non-ADHD groups: biased to fast responses in ADHD-HI and biased to slow responses in ADHD-IA and ADHD-C. Conclusion: The results suggest that response time profiles were abnormal in all ADHD subtypes and were markedly different between children meeting criteria for ADHD-HI and those meeting criteria for ADHD-IA or ADHD-C.

First published on August 25, 2008, doi:10.1177/1087054708323006

Journal of Attention Disorders 2009;13:66.

A more recent version of this article appeared on July 1, 2009

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