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Journal of Abnormal Child Psychology

, Volume 44, Issue 1, pp 141–154 | Cite as

Cognitive Load Differentially Impacts Response Control in Girls and Boys with ADHD

  • Karen E. Seymour
  • Stewart H. Mostofsky
  • Keri S. Rosch
Article

Abstract

Children with attention-deficit hyperactivity disorder (ADHD) consistently show impaired response control, including deficits in response inhibition and increased intrasubject variability (ISV) compared to typically-developing (TD) children. However, significantly less research has examined factors that may influence response control in individuals with ADHD, such as task or participant characteristics. The current study extends the literature by examining the impact of increasing cognitive demands on response control in a large sample of 81children with ADHD (40 girls) and 100 TD children (47 girls), ages 8–12 years. Participants completed a simple Go/No-Go (GNG) task with minimal cognitive demands, and a complex GNG task with increased cognitive load. Results showed that increasing cognitive load differentially impacted response control (commission error rate and tau, an ex-Gaussian measure of ISV) for girls, but not boys, with ADHD compared to same-sex TD children. Specifically, a sexually dimorphic pattern emerged such that boys with ADHD demonstrated higher commission error rate and tau on both the simple and complex GNG tasks as compared to TD boys, whereas girls with ADHD did not differ from TD girls on the simple GNG task, but showed higher commission error rate and tau on the complex GNG task. These findings suggest that task complexity influences response control in children with ADHD in a sexually dimorphic manner. The findings have substantive implications for the pathophysiology of ADHD in boys versus girls with ADHD.

Keywords

Intrasubject variability cognitive control sex differences response inhibition attention deficit hyperactivity disorder 

Notes

Acknowledgments

This research was supported in part by NIH grants R01 MH078160, R01 MH085328, and K23 MH101322 and Johns Hopkins University School of Medicine Institute for Clinical and Translational Research (NIH/National Center for Research Resources Clinical and Translational Science Award program, UL1 RR025005).

Conflict of Interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Karen E. Seymour
    • 1
  • Stewart H. Mostofsky
    • 2
  • Keri S. Rosch
    • 3
  1. 1.Division of Child and Adolescent PsychiatryJohns Hopkins University School of MedicineBaltimoreUSA
  2. 2.Departments of Neurology and of Psychiatry and Behavioral Sciences and Kennedy Krieger InstituteJohns Hopkins University School of MedicineBaltimoreUSA
  3. 3.Department of Psychiatry and Behavioral Sciences and Kennedy Krieger InstituteJohns Hopkins University School of MedicineBaltimoreUSA

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