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The IQs of Children with ADHD Are Normally Distributed.
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Kaplan, Bonnie J.; Crawford, Susan G.; Dewey, Deborah M.; Fisher, Geoff C. – Journal of Learning Disabilities, 2000
The vocabulary and block design short forms of the Wechsler Intelligence Scale for Children-Third Edition were administered to 63 children with attention deficit hyperactivity disorder (ADHD), 69 children with reading difficulties (RD), and 68 children with comorbid ADHD and RD. No significant differences were found. (Contains references.)…
Descriptors: Attention Deficit Disorders, Children, Cognitive Ability, Intelligence Differences
Specific Deficits in Component Reading and Language Skills: Genetic and Environmental Influences.
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Olson, Richard; And Others – Journal of Learning Disabilities, 1989
Word recognition data from identical and fraternal twins and siblings (N=172) indicated that the phonological coding deficit of children with reading disabilities was highly heritable. Orthographic coding was not significantly heritable. Poor readers with low IQs were superior to similar reading but average IQ readers in phonological coding.…
Descriptors: Elementary Secondary Education, Genetics, Heredity, Intelligence Differences
ADHD and Reading Disabilities: A Cluster Analytic Approach for Distinguishing Subgroups.
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Bonafina, Marcela A.; Newcorn, Jeffrey H.; McKay, Kathleen E.; Koda, Vivian H.; Halperin, Jeffrey M. – Journal of Learning Disabilities, 2000
Using cluster analysis, a study empirically divided 54 children with attention-deficit/hyperactivity disorder (ADHD) based on their Full Scale IQ and reading ability. Clusters had different patterns of cognitive, behavioral, and neurochemical functions, as determined by discrepancies in Verbal-Performance IQ, academic achievement, parent…
Descriptors: Academic Achievement, Aggression, Attention Deficit Disorders, Children
Cognitive Functioning as Measured by the WISC-R: Do Children with Learning Disabilities Have Distinctive Patterns of Performance?
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D'Angiulli, Amedeo; Siegel, Linda S. – Journal of Learning Disabilities, 2003
Data from 143 children with reading disabilities (RD), 100 with arithmetic disabilities (AD), and 121 controls (ages 6-16) found the RD and AD groups had significantly lower scores on all verbal IQ subtests. Many also showed significant differences between verbal and performance IQ scores, but so did many controls. (Contains references.)…
Descriptors: Disability Identification, Elementary Secondary Education, Intelligence Differences, Intelligence Quotient
The External Validity of Age-versus IQ-Discrepancy Definitions of Reading Disability: Lessons from a Twin Study.
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Pennington, Bruce F.; And Others – Journal of Learning Disabilities, 1992
This study of 640 twins with reading disability and 436 controls (mean age 12) examined external validity of the distinction between specific reading retardation and reading backwardness, in 3 domains: genetic etiology, sex ratio and clinical correlates, and neuropsychological profiles. There was no evidence of differential genetic etiology of the…
Descriptors: Age Differences, Definitions, Educational Diagnosis, Elementary Secondary Education
Differential Genetic Etiology of Reading Disability as a Function of IQ.
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Wadsworth, Sally J.; Olson, Richard K.; Pennington, Bruce F.; DeFries, John C. – Journal of Learning Disabilities, 2000
Composite reading performance data from 223 pairs of identical twins and 169 same-gender fraternal twins in which at least one member was classified with reading disability were subjected to multiple regression analysis. Results indicated that the genetic etiology of reading disability differs as a linear function of IQ. (Contains extensive…
Descriptors: Biological Influences, Children, Disability Identification, Environmental Influences
Do the Effects of Computer-Assisted Practice Differ for Children with Reading Disabilities with and without IQ-Achievement Discrepancy?
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Jimenez, Juan E.; Ortiz, Maria del Rosario; Rodrigo, Mercedes; Hernandez-Valle, Isabel; Ramirez, Gustavo; Estevez, Adelina; O'Shanahan, Isabel; Trabaue, Maria de la Luz – Journal of Learning Disabilities, 2003
A study assessed whether the effects of computer-assisted practice on visual word recognition differed for 73 Spanish children with reading disabilities with or without aptitude-achievement discrepancy. Computer-assisted intervention improved word recognition. However, children with dyslexia had more difficulties than poor readers during…
Descriptors: Computer Assisted Instruction, Computer Uses in Education, Dyslexia, Elementary Education