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Peer reviewed
Direct linkSanchez, Juan D. – Journal of Applied Measurement, 2011
The San Francisco Unified School District (SFUSD) uses the Language and Literacy Assessment Rubric (LALAR) as the secondary measurement required by the No Child Left Behind (NCLB) Act to measure English proficiency of English language learners (ELLs). In this analysis, the Rasch model is used to identify whether the LALAR is a valid measurement…
Descriptors: Validity, English (Second Language), Language Proficiency, English Language Learners
Huynh, Huynh; Rawls, Anita – Journal of Applied Measurement, 2011
There are at least two procedures to assess item difficulty stability in the Rasch model: robust z procedure and "0.3 Logit Difference" procedure. The robust z procedure is a variation of the z statistic that reduces dependency on outliers. The "0.3 Logit Difference" procedure is based on experiences in Rasch linking for tests developed by…
Descriptors: Comparative Analysis, Item Response Theory, Test Items, Difficulty Level
