This study investigated how student and school-level socioeconomic status (SES) measures predict students' odds of being identified for special education, particularly high-incidence disabilities. Using the Early Childhood Longitudinal Study--Kindergarten cohort, hierarchical models were used to determine the relations of student and school SES to…

This study used a statewide longitudinal sample to examine mathematics achievement gaps and growth in students with and without disabilities and to examine the impact of different methods of determining disability group membership on achievement gaps and growth. When disability status was determined on the basis of special education placement each…

We investigated whether minority children attending U.S. elementary and middle schools are disproportionately represented in special education. We did so using hazard modeling of multiyear longitudinal data and extensive covariate adjustment for potential child-, family-, and state-level confounds. Minority children were consistently less likely…

This study examined the prevalence of indicators of disability or potential disability among preschool-aged children enrolled in the Early Head Start Research and Evaluation Longitudinal Follow-Up. Three categories of indicators were established: received Part B services, developmental risk, and biological risk. The majority of participating…

Current clinical diagnosis of Autism Spectrum Disorders (ASD) occurs between 3 and 4 years of age, but increasing evidence indicates that intervention begun earlier may improve outcomes. Using secondary analysis of the Early Childhood Longitudinal Study-Birth Cohort data set, the current study identifies early predictors prior to the diagnosis of…

Current clinical diagnosis of Autism Spectrum Disorders (ASD) occurs between 3 and 4 years of age, but increasing evidence indicates that intervention begun earlier may improve outcomes. Using secondary analysis of the Early Childhood Longitudinal Study-Birth Cohort data set, the current study identifies early predictors prior to the diagnosis of…

This paper describes a current national study funded by the Office of Special Education Programs, the Special Education Elementary Longitudinal Study (SEELS). SEELS is a 6-year study (1999-2005) that will document the school experiences of a national sample of school-age students with disabilities by following students as they move from elementary…

This report summarizes characteristics of students with disabilities in the National Education Longitudinal Study (NELS:88), which conducted a base-year survey in 1988 of all U.S. public and private schools containing eighth grades, followed up at 2-year intervals in 1990, 1992, and 1994. Among general observations are the following: (1) students…