In response to Hallahan et al, the authors suggest that variability in prevalence is a function of the methods used to examine prevalence differences and that the effect specific discrepancy criteria for learning disabilities have on the number of students identified is the critical issue. (Author/DB)

This article reviews the efforts made since 1962 to define learning disabilities, discusses 11 prominent definitions, identifies important conceptual elements on which the definitions differ, and calls for a consensual acceptance of the National Joint Committee on Learning Disabilities definition. (PB)

This paper presents a theoretical model illustrating L. Siegel's revisionist conceptualization of learning disabilities and then presents an alternative underachievement model. The paper argues that the alternative model applies standard regression procedures which would lead to a more appropriate definition of learning disabilities and applies…

This critique of a paper by Linda Siegel (EC221505) challenges Siegel's assumptions on the relationship of Intelligence Quotient to learning disabilities as being unacceptable and non-literature-based, and points out that discussion of Intelligence Quotient cutoffs may be moot given that 49 states employ no cutoff for learning disabilities. (JDD)

This article examines the problem of definition in learning disabilities. It discusses the failure of conceptual definitions to provide a clear idea of what learning disabilities are, examines the true nature of available definitions as stipulative definitions, and notes the difficulty in conceptualizing and implementing operational definitions.…

In response to a previous article, the paper stresses that, in addition to theory development, the field of learning disabilities needs to resolve definitional issues involving disability specificity, intelligence, measurement concepts, and the continua of abilities. Suggestions for developing operational definitions of both learning disabilities…

The field of learning disabilities (LD) needs to focus on four issues concerned with research and practice: (1) differentiation of LD from other problems, (2) identification of LD subgroups, (3) effects of specific interventions with specific subgroups, and (4) recognition of social/cultural influences on LD identification and services. (Author/DB)

Use of the discrepancy approach in defining learning disabilities is challenged, as intelligence tests do not measure potential, are not independent from what is measured by achievement tests, and are not powerful predictors of low reading performance. Use of intelligence tests in analysis, identification, and definition of learning disabilities…

In commenting on Linda Siegel's argument (in EC221505) that Intelligence Quotient is not causally related to reading difficulties, this paper argues that Intelligence Quotient is relevant to the definition of reading disabilities but that present knowledge may not justify its use in the selection of children for special services. (JDD)

The National Joint Committee for Learning Disabilities' definition of learning disabilities is presented, followed by a discussion of parameters to be considered in operationalizing the definition. Major definitional issues are then explored, including using testable and meaningful constructs, linking definitions to neuropsychological evidence,…

This critique of H. Lee Swanson's "Toward a Metatheory of Learning Disabilities" comments on Swanson's concept of learning disabilities, cognitive science, and information processing theory. A different research and theory-building agenda is proposed, focusing on society's definition of learning disabilities and instructional issues and…

This paper summarizes the information available regarding the effects of teacher enthusiasm in elementary, secondary and postsecondary settings and reports on a recent study examining effects of teacher enthusiasm with learning disabled adolescents. Operational definitions of enthusiasm as well as speculations regarding the nature of its effects…

This study examined the prevalence of attention deficit hyperactivity disorder (ADHD) in special education children (n=581) and children (n=135) referred to a tertiary-care specialty clinic for learning disabilities and ADHD. Prevalence rates varied depending on whether teacher ratings alone, parent ratings alone, or a combination were used.…

This book examines critical issues in classification and definition of learning disabilities; the development of theory in learning disabilities; the development of cognitive, developmental, and educational models of learning disabilities; and social and public policy in learning disabilities. After an introductory chapter by G. Reid Lyon and…