Developmental dyscalculia (DD) is a mathematics learning disorder that affects approximately 5% to 7% of the population. This study aimed to detect the underlying domain-specific and domain-general differences between DD and typically developing (TD) children. We recruited 9-year-old primary school children to form the DD group via a 2-year…

A number of previous studies have identified cognitive deficits in developmental dyscalculia (DD). Yet, most of these studies were in alphabetic languages, whereas few of them examined Chinese DD. Here, we conducted a study aiming to determine the cognitive factors associated with DD in Chinese children. Five candidate cognitive factors of…

A relationship between motor and mathematical skills has been shown by previous research. However, the question of whether subtypes can be differentiated within developmental coordination disorder (DCD) and/or mathematical learning disability (MLD) remains unresolved. In a sample of children with and without DCD and/or MLD, a data-driven…

In transparent orthographies like German, isolated learning disabilities in either reading or spelling are common and occur as often as a combined reading and spelling disability. However, most issues surrounding the cognitive causes of these isolated or combined literacy difficulties are yet unresolved. Recently, working memory dysfunctions have…

This study examines visual and spatial working memory skills in 35 third to fifth graders with both mathematics learning disabilities (MLD) and poor problem-solving skills and 35 of their peers with typical development (TD) on tasks involving both low and high attentional control. Results revealed that children with MLD, relative to TD children,…

Focusing primarily on learning disabled children, the article briefly reviews the literature related to perceptual skills required in reading acquisition and the validity of current perceptual measures to tap these task-related perceptual abilities, and proposes an informal task-related measure to overcome the drawbacks of more formal measures of…

Two groups of 15 boys (mean age 8 years, mean IQ 100), both presenting difficulties in academic achievement, but one with and one without visuomotor impairments, were assessed to determine whether poor drawing ability was related to perceptual or motor disorders. (Author)

Scores of 25 learning disabled students (aged 9 to 13) were compared on five tests: a visual-perceptual test (Coloured Progressive Matrices); an auditory-perceptual test (Auditory Motor Placement); a listening and reading comprehension test (Durrell Listening-Reading Series); and a word recognition test (Word Recognition subtest, Diagnostic…

In order to evaluate the effectiveness of the Wechsler Intelligence Scale for Children (WISC) in discriminating auditory or visual deficits, 121 learning disabled children (mean age 100 months) were tested. (PHR)

The study evaluated the construct validity of five perceptual traits with simulated work samples from the Jewish Vocational Service Work Sample System. Results with 36 learning disabled adolescents indicated that simulated work samples can be used as a diagnostic instrument for assessment of perceptual abilities in a vocational setting. (Author/DB)

Paper presented at the Annual Meeting of the American Society of Clinical Hypnosis (12th, San Francisco, California, November 1, 1969). (RJ)

Visual and auditory coding processes in learning-disabled students (SLDs, n=19) and control students (SCs, n=19) were examined. Analysis of decision latencies revealed that with initial task exposure, SLDs responded more slowly than SCs, but confusability patterns were similar. With practice, overall latencies became comparable, while…

Examined was the relationship between the Frostig Developmental Test of Visual Perception and academic achievement as measured by the scholastic Research Association Achievement Test Battery with 125 primary grade children. (Author/DB)