Cited by 199Attention Deficit Hyperactivity DisorderDevelopmental and Educational NeuropsychologyReading and Literacy Development

Naming Speed Performance and Stimulant Effects Indicate Effortful, Semantic Processing Deficits in Attention-Deficit/Hyperactivity Disorder

Tannock, Rosemary, Martinussen, Rhonda, Frijters, Jan·2000·Journal of Abnormal Child Psychology

Abstract

This study investigated rapid automatized naming and effects of stimulant medication in school-age children with attention-deficit/hyperactivity disorder (ADHD) with and without concurrent reading disorder (RD). Two ADHD groups (67 ADHD only; 21 ADHD + RD) and a control group of 27 healthy age-matched peers were compared on four variables: color naming speed, letter naming speed, phonologic decoding, and arithmetic computation. Discriminant function analysis (DFA) was conducted to predict group membership. The four variables loaded onto two discriminant functions with good specificity: phonologic decoding, letter naming speed, and arithmetic defined the first function; color naming speed defined the second function. Both ADHD groups were significantly slower in color naming than controls, but did not differ from one another. DFA correctly classified 96% of the control group, 91% of ADHD + RD, and 82% of ADHD only. A subset of children in the ADHD groups participated subsequently in an acute, randomized, placebo-controlled, crossover trial with three single doses (10, 25, 20 mg) of methylphenidate. Methylphenidate selectively improved color-naming speed but had no effect on the speed of naming letters or digits. These findings challenge the tenet that naming speed deficits are specific to RD and implicate naming speed deficits associated with effortful semantic processing in ADHD, which are improved but not normalized by stimulant medication.

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Registry

Crossref · 10.1023/a:1005192220001

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  • Comorbidity amongst math disorder, reading disorder, and ADHD has been associated with low processing speed.

    “comorbidity amongst MD, RD, and ADHD has also been associated with low PS, and the relationships between these deficits continue to be explored20,40–44.”
  • These collective findings support previous research showing a relationship between MD, RD, and PS deficit.

    “These collective findings support previous research showing a relationship between MD, RD, and PS deficit22,40,42,43.”

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Authors
Tannock, R., Martinussen, R., & Frijters, J.
Affiliations
Hospital for Sick Children (CA)
Corresponding author
Tannock, Rosemary
Venue
Journal of Abnormal Child Psychology
Published
2000-06
Volume
28
Issue
3
Pages
237-252
ISSN
  • 0091-0627 (ISSN-L)
  • 1573-2835
OpenAlex
W1548385953
Cited by
198
References
108
Citations by year
2026: 1 · 2025: 5 · 2024: 2 · 2023: 5 · 2022: 7 · 2021: 6 · 2020: 4 · 2019: 4 · 2018: 7 · 2017: 5 · 2016: 6 · 2015: 12 · 2014: 15 · 2013: 8 · 2012: 4
FWCI
3.29
Type
journal article
Language
en
Open access
closed
Locations
  • Research on Child and Adolescent Psychopathology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Medical Research Council
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, rapid automatized naming, naming speed, reading disorders, color naming, letter naming, arithmetic computation, methylphenidate, stimulant medication, semantic processing, effortful processing, elementary school students
MeSH terms
Central Nervous System Stimulants, Attention Deficit Disorder with Hyperactivity, Child, Dyslexia, Female, Humans, Male, Methylphenidate, Reaction Time, Verbal Behavior, Case-Control Studies

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