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A Register Study Suggesting Homotypic and Heterotypic Comorbidity among Individuals with Learning Disabilities
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Tuija Aro; Reeta Neittaanmäki; Elisa Korhonen; Heli Riihimäki; Minna Torppa – Journal of Learning Disabilities, 2024
The present study examined whether learning disabilities (LD) in reading and/or math (i.e., reading disability [RD], math disability [MD], and RD+MD) co-occur with other diagnoses. The data comprised a clinical sample (n = 430) with LD identified in childhood and a sample of matched controls (n = 2,140). Their medical diagnoses (according to the…
Descriptors: Comorbidity, Learning Disabilities, Neurodevelopmental Disorders, Mental Disorders
Comorbid Word Reading and Mathematics Computation Difficulty at Start of First Grade
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Lynn S. Fuchs; Douglas Fuchs; Eunsoo Cho; Marcia A. Barnes; Tuire Koponen; Daniel R. Espinas – Journal of Learning Disabilities, 2025
The purpose of this analysis was to describe cognitive processes associated with comorbid difficulty between word reading (WR) and mathematics computation (MC) at the start of first grade among children selected for WR and MC delays. A sample of 234 U.S. children (mean age 6.50 years, SD = 0.31) was assessed on WR, MC, core cognitive processes…
Descriptors: Reading Skills, Mathematics Skills, Comorbidity, Reading Difficulties
Reading Fluency in Chinese Children with Reading Disabilities and/or ADHD: A Key Role for Morphology
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Li, Miao; Georgiou, George; Kirby, John R.; Frijters, Jan C.; Zhao, Wei; Wang, Tingzhao – Journal of Learning Disabilities, 2023
The Triangle Model of Reading proposes that phonology, orthography, and semantics are crucial to understand word reading and reading disability (RD). Morphology has been added as a binding agent to this model. However, it is unclear how these variables relate to word reading in children with attention deficit/hyperactivity disorder (ADHD) or…
Descriptors: Students with Disabilities, Grade 1, Grade 2, Grade 3
A Neuropsychological Profile of Developmental Dyscalculia: The Role of Comorbidity
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Luoni, Chiara; Scorza, Maristella; Stefanelli, Silvia; Fagiolini, Barbara; Termine, Cristiano – Journal of Learning Disabilities, 2023
Developmental dyscalculia (DD) has long been thought to be determined by multiple components. Dyscalculia has high comorbidity with other learning and developmental disabilities, including reading and writing disorders, attention deficits, and problems in visual/spatial skills, short memory, and working memory. This study aims to assess prevalence…
Descriptors: Developmental Delays, Learning Disabilities, Mathematics Skills, Comorbidity
Dysgraphia Differs between Children with Developmental Coordination Disorder and/or Reading Disorder
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Caroline Jolly; Marianne Jover; Jérémy Danna – Journal of Learning Disabilities, 2024
Handwriting deficits, or dysgraphia, are present in several neurodevelopmental disorders. To investigate whether dysgraphia differs according to the associated disorder, we performed a detailed analysis of handwriting in a group of French children with developmental coordination disorders (DCD), reading disorder (RD), or comorbid RD and DCD.…
Descriptors: Learning Disabilities, Neurodevelopmental Disorders, Handwriting, Students with Disabilities
Comorbidity in Reading Comprehension and Word-Problem Solving Difficulties: Exploring Shared Risk Factors and Their Impact on Language Minority Learners
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Cho, Eunsoo; Mancilla-Martinez, Jeannette; Hwang, Jin Kyoung; Fuchs, Lynn S.; Seethaler, Pamela M.; Fuchs, Douglas – Journal of Learning Disabilities, 2022
The purpose of this study was threefold: to examine unique and shared risk factors of comorbidity for reading comprehension and word-problem solving difficulties, to explore whether language minority (LM) learners are at increased risk of what we refer to as "higher order comorbidity" (reading comprehension and word-problem solving…
Descriptors: Comorbidity, Problem Solving, Reading Comprehension, Word Problems (Mathematics)