In conducting this review, we examine literature that explores the merits and shortcomings of ELP test design and testing as they have evolved over time through the current era of CCR standards. In the first section, we situate the role of language testing in its broader historical and policy context. In the second section, we examine the evolving…

In this article, I specify a conceptual framework for test validity research on content assessments taken by English language learners (ELLs) in U.S. schools in grades K-12. This framework is modeled after one previously delineated by Willingham et al. (1988), which was developed to guide research on students with disabilities. In this framework…

The purpose of this study was to use differential item functioning (DIF) and latent mixture model analyses to explore factors that explain performance differences on a large-scale mathematics assessment between examinees allowed to use a calculator or who were afforded item presentation accommodations versus those who did not receive the same…

This report introduces the General Education Development Testing Services (GEDTS) Administrator screening model for adults with learning disabilities. The screening model is designed to identify adults whose educational achievement is significantly below overall potential due to an informational processing deficit and who are thus eligible for…

This report synthesizes the results of activities of the National Center on Educational Outcomes (NCEO) focused on determining whether secondary data analysis of state and/or national data collection programs could produce policy-relevant reports on the status of children and youth with disabilities. The report describes methodology and findings…