This article addresses the nature of dyslexia and best practices for identification and treatment within the context of multitier systems of support (MTSS). We initially review proposed definitions of dyslexia to identify key commonalities and differences in proposed attributes. We then review empirical evidence for proposed definitional…

The study aimed to investigate the spelling performance and the semantic understanding of compound words by 103 Greek primary school children (first through sixth grade). The experimental group comprised of 25 children with spelling difficulties and compared with a control group of 78 children of typical development. Children were asked to spell…

Three cohorts of third-grade students (N = 813) were evaluated on achievement, cognitive abilities, and behavioral attention according to contrasting research traditions in defining math learning disability (LD) status: low achievement versus extremely low achievement and IQ-achievement discrepant versus strictly low-achieving LD. We use methods…

The regression-based discrepancy definition of learning disabilities has been suggested by Rutter and Yule as an improvement of the well-known and much criticized achievement-intelligence discrepancy definition, whereby the examinee's predicted reading attainment is substituted for the intelligence score in the discrepancy expression. Even though…

Rates of agreement among alternative definitions of reading disability and their 1- and 2-year stabilities were examined using a new measure of agreement, the affected-status agreement statistic. Participants were 288,114 first through third grade students. Reading measures were "Dynamic Indicators of Basic Early Literacy Skills" Oral…

In 2007, the New Zealand Ministry of Education formally recognized the condition of dyslexia for the first time and has subsequently developed a working definition of the condition. The aim of this article is to draw on contemporary theory and research on reading development, reading difficulties, and reading intervention to describe what the…

The author reviews issues in the search for a definition of learning disabilities, suggesting that the effort is within an unidimensional framework without recognition of the lack of unidimensional characteristics in children. (Author)

The author addresses the problem of defining the learning disabled population and considers a solution to the dilemma in which different definitions serve different functions. (SBH)

The position paper of the National Joint Committee on Learning Disabilities provides five criticisms of the definition of learning disabilities developed in 1967 by the National Advisory Committee on Handicapped Children and proposes an alternative definition. (DB)

Based on approximately 1,600 referrals of disabled and regular students, 94 empirically derived formulas for assessment of learning disability were used. The most discriminating formula, which included Wechsler Intelligence Scale for Children, Wide Range Achievement Test and grade level variables, resulted in moderate coefficients. (Author/CL)

In the absence of a clear definition of learning disabilities, it has become an educational simile with children described as "like a learning disabled child." The learning disabled label has become reflective of a problem related more to social structure than to children. Greater attention should be given to individual needs and less emphasis…

Learning disabilities is presented as a construct supported by psychoeducational, socioemotional, and physiological data, as illustrated by the M. Meeker paradigm. (Author)

The author points out two problems with the field of learning disabilities: the term caught on before a satisfactory definition had been determined and the field totally disregards the Law of Parsimony, which requires that one should never give a complicated answer when a simple one will do. (SBH)

To help educators understand the cognitive and behavioral sequelae of cerebral injury, the neuropathology of traumatic brain injury and the main neuropathological features resulting from trauma-related brain damage are reviewed. A glossary with definitions of 37 neurological terms is appended. (Author/DB)

The new definition of learning disabilities proposed by the National Joint Committee for Learning Disabilities is discussed in terms of its need, procedures followed in its development, the Committee's intention regarding critical elements, and the definition's current status (acceptance by four of the six member organizations). (DB)