High comorbidity rates between reading disorder (RD) and mathematics disorder (MD) indicate that, although the cognitive core deficits underlying these disorders are distinct, additional domain-general risk factors might be shared between the disorders. Three domain-general cognitive abilities were investigated in children with RD and MD:…

The aim of the present study was to investigate the associations between elementary school children's mathematical achievement and their conservation abilities, visuospatial skills, and numerosity processing speed. We also assessed differences in these abilities between children with different types of learning problems. In Study 1 (N = 229), we…

This study investigated if developmental dyscalculia (DD) in children with different profiles of mathematical deficits has the same or different cognitive origins. The defective approximate number system hypothesis and the access deficit hypothesis were tested using two different groups of children with DD (11-13 years old): a group with…

This study examined the relationship between cognitive abilities and math achievement within a sample of college students with learning disabilities (LD). The cognitive abilities were seven areas identified by Stratum II of the Cattell-Horn-Carroll (CHC) theory of cognitive abilities, in addition to the eighth area of Working Memory. Math…

The present study aimed to examine the nature of the working memory and general cognitive ability deficits experienced by university students with a specific reading comprehension deficit. A total of 32 university students with poor reading comprehension but average word-reading skills and 60 age-word-matched controls with no comprehension…

Relationships between attention/executive functions and language learning were investigated in students in Grades 4 to 9 (N = 88) with and without specific learning disabilities (SLDs) in multiword syntax in oral and written language (OWL LD), word reading and spelling (dyslexia), and subword letter writing (dysgraphia). Prior…

The project Adult Dyslexia and Attention Deficit Disorder in Finland (Project DyAdd) compares adults (n = 119, 18-55 years) with dyslexia, attention-deficit/hyperactivity disorder (ADHD), dyslexia together with ADHD (comorbid), and healthy controls with neuropsychological, psychophysical, and biological methods. The focus of this article is on the…

Between 5% and 8% of school-age children have some form of memory or cognitive deficit that interferes with their ability to learn concepts or procedures in one or more mathematical domains. A review of the arithmetical competencies of these children is provided, along with discussion of underlying memory and cognitive deficits and potential…

Papers from a symposium on specific cognitive impairment in children with learning disabilities are summarized, and the implications of their results for further research are discussed. While most of the papers addressed reading skills, the generalizability of the research for other learning-disabled children is also considered. (MSE)

Instruction designed to facilitate planning was provided to 12 math students (ages 9-12) with learning disabilities to determine if there would be differential effects on individual students. Teaching control and regulation of cognitive activity was beneficial for all students but was especially helpful for those with poor planning skills.…

A study that compared 20 children with reading difficulties (RD) with severe executive processing deficits, 16 with RD with moderate executive processing ability, 20 with high ability, and 20 who had moderate sentence span scores, found a domain-general system may partially contribute to poor working memory in children with RD. (Contains…

Analyses compared serial memory, verbal learning, and abstract visual-spatial memory performance of 45 children (ages 9-12) with reading disabilities (RD) to chronological-age- (CA) and reading-level- (RL) matched controls. Phonological deficit and dual route comparisons indicate children with RD performed more poorly than CA-matched and better…

Measurement of cognitive abilities using the Inventory of Piaget's Developmental Tasks of 94 learning disabled fourth- and fifth-grade children found that a linear combination of reading and mathematics achievement yielded a significant positive correlation to cognitive ability. No sex differences were found. (Author/DB)

This study examined the utility of the Planning, Attention, Simultaneous, Successive (PASS) theory of intelligence as measured by the "Cognitive Assessment System" (CAS) for evaluation of children with attention-deficit/hyperactivity disorder (ADHD). The CAS scores of 51 Dutch children without ADHD were compared to the scores of a group…

This review of 28 studies involving children with attention deficit-hyperactivity disorder concludes that there is little empirical support for cognitive training's clinical utility. The paper discusses cognitive training's efficacy as a single intervention and as an adjunct to stimulant treatment, and its impact on cognitive, academic, and…