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Validity of the Executive Function Theory of Attention-Deficit/Hyperactivity Disorder: A Meta-Analytic Review
The Prevalence of DSM-IV Attention-Deficit/Hyperactivity Disorder: A Meta-Analytic Review
- E. Willcutt
- 15 August 2012
This article describes a comprehensive meta-analysis that was conducted to estimate the prevalence of attention-deficit/hyperactivity disorder (ADHD), as defined by the Diagnostic and Statistical…
Validity of DSM-IV attention deficit/hyperactivity disorder symptom dimensions and subtypes.
The DSM-IV ADHD subtypes provide a convenient clinical shorthand to describe the functional and behavioral correlates of current levels of inattention and hyperactivity-impulsivity symptoms, but do not identify discrete subgroups with sufficient long-term stability to justify the classification of distinct forms of the disorder.
Neuropsychological Analyses of Comorbidity Between Reading Disability and Attention Deficit Hyperactivity Disorder: In Search of the Common Deficit
- E. Willcutt, B. Pennington, R. Olson, N. Chhabildas, Jacqueline Hulslander
- PsychologyDevelopmental neuropsychology
- 1 February 2005
The group with comorbid RD and ADHD exhibited the combination of the deficits in the RD-only and ADHD-only groups, providing evidence against the phenocopy and cognitive subtype hypotheses as explanations for the co-occurrence ofRD and ADHD.
Processing Speed Deficits in Attention Deficit/Hyperactivity Disorder and Reading Disability
The results suggest that a general PS deficit exists in both clinical groups compared to controls, although children with RD demonstrate greater PS deficits than children with ADHD.
A comparison of the cognitive deficits in reading disability and attention-deficit/hyperactivity disorder.
The RD + ADHD group was most impaired on virtually all measures, providing evidence against the phenocopy hypothesis as an explanation for comorbidity between RD and ADHD.
Psychiatric comorbidity in children and adolescents with reading disability.
Preliminary etiological analyses suggested that common familial factors predispose both probands with RD and their non-RD siblings to exhibit externalizing behaviors, whereas elevations of internalizing symptomatology are restricted to individuals with RD.
Causal Heterogeneity in Attention-Deficit/Hyperactivity Disorder: Do We Need Neuropsychologically Impaired Subtypes?
ADHD prevalence estimates across three decades: an updated systematic review and meta-regression analysis.
- G. Polanczyk, E. Willcutt, G. Salum, C. Kieling, L. Rohde
- Psychology, MedicineInternational journal of epidemiology
- 24 October 2013
In the past three decades, there has been no evidence to suggest an increase in the number of children in the community who meet criteria for ADHD when standardized diagnostic procedures are followed.
Comorbidity of Reading Disability and Attention-Deficit/ Hyperactivity Disorder
The hyperactive and impulsive behaviors exhibited by boys with RD may be more disruptive than the inattentive behavior exhibited by girls and may therefore precipitate more frequent referrals for clinical attention.