Cited by 216Attention Deficit Hyperactivity DisorderDevelopmental and Educational NeuropsychologyReading and Literacy Development

Working memory influences processing speed and reading fluency in ADHD

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Jacobson, Lisa A., Ryan, Matthew, Martin, Rebecca B., Ewen, Joshua, Mostofsky, Stewart H., Denckla, Martha B., Mahone, E. Mark·2011·Child Neuropsychology

Abstract

Processing-speed deficits affect reading efficiency, even among individuals who recognize and decode words accurately. Children with ADHD who decode words accurately can still have inefficient reading fluency, leading to a bottleneck in other cognitive processes. This "slowing" in ADHD is associated with deficits in fundamental components of executive function underlying processing speed, including response selection. The purpose of the present study was to deconstruct processing speed in order to determine which components of executive control best explain the "processing" speed deficits related to reading fluency in ADHD. Participants (41 ADHD, 21 controls), ages 9-14 years, screened for language disorders, word reading deficits, and psychiatric disorders, were administered measures of copying speed, processing speed, reading fluency, working memory, reaction time, inhibition, and auditory attention span. Compared to controls, children with ADHD showed reduced oral and silent reading fluency and reduced processing speed-driven primarily by deficits on WISC-IV Coding. In contrast, groups did not differ on copying speed. After controlling for copying speed, sex, severity of ADHD-related symptomatology, and GAI, slowed "processing" speed (i.e., Coding) was significantly associated with verbal span and measures of working memory but not with measures of response control/inhibition, lexical retrieval speed, reaction time, or intrasubject variability. Further, "processing" speed (i.e., Coding, residualized for copying speed) and working memory were significant predictors of oral reading fluency. Abnormalities in working memory and response selection (which are frontally mediated and enter into the output side of processing speed) may play an important role in deficits in reading fluency in ADHD, potentially more than posteriorally mediated problems with orienting of attention or perceiving the stimulus.

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Research works printed but not linked: 5

  1. Cambridge Cognition 1996 CANTAB Cambridge, England Cambridge Cognition Limited
  2. Delis DC Houston WS Wetter S Han SD Jacobson M Holdnack J 2007 The importance of testing higher-level executive functions in school-age children and adolescents Journal of Psychoeducational Assessment 25 1 29 40
  3. DuPaul GJ Power TJ Anastopoulos AD Reid R 1998 ADHD Rating Scale-IV New York Guilford Press
  4. Mahone EM Richardson ME Crocetti D Clauss JA Denckla MB Mostofsky SH 2009 Regional frontal lobe anomalies in girls with ADHD Journal of the International Neuropsychological Society 15 S1 197
  5. Wiederholt L Bryant B 2000 Examiner’s Manual: Gray Oral Reading Test-Fourth Edition Austin, Tx Pro-Ed

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Authors
Jacobson, L. A., Ryan, M., Martin, R. B., Ewen, J., Mostofsky, S. H., Denckla, M. B., & Mahone, E. M.
Affiliations
  • Kennedy Krieger Institute (US)
  • University of Houston (US)
Corresponding author
Jacobson, Lisa A.
Venue
Child Neuropsychology
Published
2011-01-31
Volume
17
Issue
3
Pages
209-224
ISSN
  • 0929-7049 (ISSN-L)
  • 1744-4136
OpenAlex
W1994226949
Cited by
215
References
47
Citations by year
2026: 8 · 2025: 10 · 2024: 14 · 2023: 23 · 2022: 13 · 2021: 20 · 2020: 12 · 2019: 11 · 2018: 17 · 2017: 11 · 2016: 13 · 2015: 25 · 2014: 18 · 2013: 12 · 2012: 5
FWCI
8.37
Type
journal article
Language
en
Open access
Locations
  • Child Neuropsychology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of Mental Health (R01MH085328, R01MH078160)
  • National Institute of Neurological Disorders and Stroke (R01NS048527)
  • National Center for Research Resources (UL1RR025005)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P30HD024061, P50HD052121)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Social Sciences › Psychology › Neuropsychology and Physiological Psychology › Developmental and Educational Neuropsychology
  • Social Sciences › Psychology › Developmental and Educational Psychology › Reading and Literacy Development
Keywords
attention deficit hyperactivity disorder, processing speed, reading fluency, working memory, executive function, response selection, oral reading fluency, silent reading, inhibition, children
MeSH terms
Adolescent, Attention, Attention Deficit Disorder with Hyperactivity, Child, Female, Humans, Language Disorders, Male, Memory, Short-Term, Neuropsychological Tests, Reaction Time, Reading, Executive Function

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