A Modified form of Sigel's Styles of Categorization Tests discriminated group and individual categorization preferences in 5th, 8th, and 11th graders consistent with the expectations of developmental theory and research for these age groups. (Author/DEP)

This review of the history of learning disabilities (LD) suggests that creation of the LD category has served scientific, if not always, policy purposes. It finds that 40 years of research have produced inventive, creative tools that benefit both investigation and intervention and, most importantly, a better understanding of individual…

Mandler (1969) found that one-third of adult subjects were seriators and two-thirds were categorizers in a task where either strategy could be employed. Study 1 was a replication of his procedure with children from Grades 1, 3, 5, 7, and 9. While there was weak evidence that some older subjects chose the categorial strategy, there was little…

This article considers whether Asperger syndrome (AS) should necessarily be viewed as a disability or as a difference. It concludes that "difference" is a more neutral and fair description. A model (the emphasizing-systemizing model) is summarized that attempts to define in what way individuals with AS are different. (Contains references.)…

A modified form of Sigel's Styles of Categorization Test was constructed, permitting the independent measurement of Descriptive Part-Whole (DPW), Relational-Contextual (RC), and Categorical-Inferential (CI) categorizations. The test was administered to 243 5th, 8th, and 11th graders on two occasions. At each grade level, a majority of…

This paper examines cognitive processing problems associated with attention deficit disorders (ADD) and their relationship to learning disabilities in elementary and secondary students. Children with ADD, medicated (N=20) and unmedicated (N=21), were compared on the Raven test of Progressive Matrices and other tests with children who had been…

The literature review examines the issue of whether categorical differentiation and placement of mentally retarded and learning disabled students is educationally warranted. First, the two conditions are defined; next, a comparison between the two on psychological, behavioral-social, and educational characteristics usually ascribed to children so…

According to Cronbach's method of data analysis--which decomposes individual scores into separate components for different levels of aggregation--data collected for an investigation of the development of individual differences in ability test scores from grade 4 through grade 9 were grouped into school district, class, and individual components.…

This article, originally published in 1968, examines learning disabilities from the perspectives of history, disciplines (calling for interdisciplinary convergence), education (viewing learning disabilities as a concept rather than a category), teacher preparation, province (evaluating the appropriateness of various delivery systems), and time…