This study explored the double-deficit hypothesis (DDH) in a transparent orthography (Finnish) and extended the view from reading disabilities to comorbidity of learning-related problems in math and attention. Children referred for evaluation of learning disabilities in second through sixth grade (N = 205) were divided into four groups based on…

Time perception has not been comprehensively examined in mathematics difficulties (MD). Therefore, verbal time estimation, production, and reproduction were tested in 13 individuals with MD and 16 healthy controls, matched for age, sex, and intellectual skills. Individuals with MD performed comparably to controls in time reproduction, but showed a…

Bisphenol A (BPA) has been shown to affect brain and behavior in rodents and nonhuman primates, but there are few studies focusing on its relationship to human neurobehavior. We aimed to investigate the relationship between environmental exposure to BPA and childhood neurobehavior. Methods: Urinary BPA concentrations and behavioral and learning…

The purpose of this research was to investigate the Wechsler Intelligence Scale for Children (WISC) subtest scores of information (IN), arithmetic (AR), digit span (DS), and coding (CO). The subjects were all of the students admitted to and remaining in the Seattle Public School District #1 Learning/Language Disability (LLD) Program since…

A study sought to compare the performance of elementary school students referred for learning difficulties on the Kaufman Assessment Battery for Children (K-ABC) and the Wechsler Intelligence Scale for Children-Revised (WISC-R) and to examine similarities and differences in performance on the two instruments between those placed in…

The overlap of the Wechsler Intelligence Scale for Children-Revised (WISC-R) and the Halstead-Reitan Neuropsychological Battery (HRNB) was investigated in light of their use in diagnosing children's learning problems. Scores for 1,181 children in the WISC-R and the HRNB were related using a canonical correlational analysis. One significant…

A multi-faceted study followed up 800 children originally administered SCREEN, a comprehensive early identification screening battery. Ss were given an individually administered diagnostic battery: The Illinois Test of Psycholinguistic Abilities (ITPA), The Wechsler Intelligence Scale for Children (WISC) Verbal Scale, The Beery Visual Motor…

A twenty-six-month follow-up study was made of 75 Anglo- and Spanish-American primary school children who were examined on the Wechsler Intelligence Scale for Children, the Illinois Test of Psycholinguistic Abilities, and the Bender Visual-Motor Gestalt Test in order to determine the specific cognitive deficits which might account for the poor…

This study examined agreement rates between identified strengths and weaknesses in shared abilities and influences on the Wechsler Intelligence Scale for Children-Revised (WISC-R) and the Kaufman Assessment Battery for Children (K-ABC). Sixty-seven students in the first through seventh grades referred for learning disabilities (LD) evaluation were…

This paper addresses the problem of heterogeneity of samples of learning disabled (LD) children by comparing five different systems for identifying homogeneous subgroups in terms of their ability to predict longitudinal reading and mathematics scores. One hundred and sixty LD children served as subjects. Three of the five subgrouping systems were…