Data from four different school sites nationwide were analyzed to examine whether standardized test results may be confounded by the lack of language proficiency of English language learners. Several analyses comparing the performance of limited English proficient (LEP) students and their non-LEP classmates revealed major differences. A Disparity…

This study examines the effect and validity of accommodations for limited English proficiency (LEP) students in the National Assessment of Educational Progress (NAEP) and the impact of language factors on the assessment and accommodation of these students. Results indicate that accommodations used in NAEP did not reduce the performance gap between…

This study examined the impact of students' background characteristics (English language proficiency) on the level of effectiveness of various types of testing accommodations. Data were collected from 946 eighth graders, some of whom were English language learners. Four accommodation strategies were used: (1) modified (simplified) English language…

Different forms of accommodation have been suggested in the assessment of English language learners (ELL). This study examined the effectiveness of a few accommodation strategies on the performance of ELL students in mathematics. A group of 946 eighth graders participated in this study. Using mathematics test items from the National Assessment of…

The impact of testing accommodation on the performance of students with limited English proficiency (LEP) was studied, focusing on the possibility of differential impact of accommodation strategies on subgroups formed based on students' background characteristics and the validity of assessments using accommodated versus nonaccommodated…