This study aimed to explore the spatial numerical association of response codes (SNARC), the flanker, and the numerical distance effects in children with mathematical difficulties. From a sample of 720 third, fourth, and fifth graders, 60 children were selected and divided into the following three groups: typically developing children (TD; n =…

The purpose of this study was to empirically determine whether specific profiles characterize preschool-aged children with language impairment (LI) with respect to their early literacy skills (print awareness, name-writing ability, phonological awareness, alphabet knowledge); the primary interest was to determine if one or more profiles suggested…

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…

The purpose of this study was to compare subgroups of students with various forms of learning difficulties (< 25th percentile) on cognitive and mathematics characteristics. Students with mathematics difficulty (MD, n = 105), reading difficulty (RD, n = 65), both (MDRD, n = 87), or neither (NoLD, n = 403) were evaluated on an array of cognitive…

Children with academic and behavioral difficulties have been found to report overly positive self-perceptions of performance in their areas of specific deficit. Researchers typically investigate self-perceptions in reference to both actual performance and ratings by teachers, peers, and parents. However, few studies have investigated whether or…

Sixty students with specific learning disabilities in either reading and spelling (Group R-S) or arithmetic (Group A), as scored by the Woodcock-Johnson Psycho-Educational Battery, were compared. Results (measured by the Wechsler Intelligence Scale for Children-Third Edition) showed weaker nonverbal skills and more counseling among Group A…

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…

Four studies involving 45 subjects found that children (ages 9-14) with nonverbal learning disabilities syndrome exhibited specific patterns of impairment in mechanical arithmetic and in psychosocial functioning, whereas children with poor performance in reading and spelling exhibited patterns of academic deficits (including arithmetic), but not…

Comparison of eight-year-old children with attention deficit hyperactivity disorder (ADHD) (n=21), learning disorder (LD) (n=12), or both (n=27) on neuropsychological measures found that ADHD children were impaired in control and inhibition of impulses; children with LD in phonological awareness, verbal memory span, storytelling, and verbal IQ;…

The Wechsler Intelligence Scale for Children-Revised profiles of 30 "uneven gifted" children (mean age 10 years) were examined to assess strengths and deficits as well as scatter. (Author)

The investigation explored the use of R. Cattell's ability traits (fluid and crystallized intelligence, visualization, and fluency) as a method of comparing 45 normal, learning disabled (LD), or educable mentally retarded (EMR) children (ages 7 to 9). (Author/PHR)

Children (N=20, age 9-12) with severe dyslexia were slower in counting from memory and naming alternating digits and letters than children with milder reading impairment. The children most disabled also had poorer phonological sensitivity, shorter digit spans, and lower verbal intelligence quotients. (Author/DB)

A study investigated the relationship between working memory (WM), declarative strategy knowledge, and math achievement in 111 children with and without mathematical disabilities (MD). Results found verbal and visual-spatial WM, stable verbal strategy choices, and expert strategy choices related to visual-spatial processing all contributed…

A study involving 93 children (ages 10-12), 295 with poor reading skills, found many children with dyslexia and some garden-variety poor readers showed significant left neglect on the Clock Drawing Test. In poor readers with dyslexia, spatial construction deficits were observed like those of parents with acquired right-hemisphere lesions.…

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…