Learning Disability Subtyping

The publication of this very important volume comes at a timely juncture in the history of learning disabilities. The focus of this volume is on developing a multidisciplinary understanding of the complexities of the research on learning disabilities and its various sUbtypes. It also will serve as an important compendium of the subtyping literature, particularly with respect to pertinent issues of nosology, specific sUbtyping models, neuro psychological diagnosis, and treatment. As the authors so correctly suggest, the differential diagnosis of learning disabilities subtypes is a critical first step in developing theoretically sound programs of psychoeducational intervention. Clearly, one must have some idea about the general abilities of a child before realistic expectations can be charted. Also, how can one plan a program of intervention without some knowledge of the deficient components of achievement within a do main? Does it not make both conceptual and practical sense to identify an individual's relative strengths and weaknesses so that abilities or strengths can be utilized to optimize functioning in areas of deficit? Although these all sound like reasonable precursors to assisting individuals in need of academic assistance, there are those who would argue otherwise. Impor tantly, however, the Director of the National Institutes of Health, in a recent report to Congress, advocates exactly what this volume proposes. Indeed, there are important needs to be addressed, and the literature reviewed herein strongly supports the conclusions drawn by these authors.

Although experts agree that various types of learning disabilities do exist, few attempts have been made to classify learning disabled children into subtypes. The editors of this collection feel that the lack of subcategorization has frustrated previous research efforts to obtain a generalizable body of knowledge in the field. To meet this critical need for definitive information, this book presents basic reviews and theoretical approaches used to subtype learning disabled children -- ranging from a behavior genetics approach to a dimensional approach. It also demonstrates actual research methods utilizing theoretical approaches.

Building upon earlier attempts to create a scientific basis for subtypes of learning disabili~ties, this volume continues to examine the extent to which various subtyping schemes are valid. Like its predecessor, Neuropsychology of Learning Disabilities: Essentials of Subtype Analysis, it seeks to define such subtypes within an explicitly neuropsychol~ogical framework. Following an insightful over~view of the dimensions and clinical applications of validity to learning disability subtypes, it reports on a wide-ranging series of investigations designed to designate the content, concurrent, predictive, construct, and clinical validity of various subtyping efforts.

This volume has been developed as a direct result of a conference sponsored by the International Academy for Research in Learning Disabilities, held at the University of California at Los Angeles. The text provides a review and critique of current research in the areas of intelligence, social cognition, achievement, and subtyping as they relate to learning disabilities. In addition, the concept that social behavior is an aspect of intelligence and the relationship between language and reading are discussed in detail by noted experts.

First Published in 1990. Routledge is an imprint of Taylor & Francis, an informa company.

It is important to reaffirm the reality of the learning disabilities (LD) phenomenon as a condition that imposes genuine constraints on a student's ability to function, and not as some chimerical entity defined by an ever-changing political situation. Perceptual, memory, attention, linguistic, social, cognitive and neuropsychological factors are an integral part of LD. By mapping out in great detail and with much new data the acquired knowledge on learning disabilities, both empirical and theoretical, this book unravels many mysteries. This book is a landmark in learning disabilities studies, and it lays down solid foundations for future research and practical intervention in the field.