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Sinclair, Jeanne; Lau, Clarissa – Language and Education, 2018
It is common practice for K-12 schools to assess multilingual students' language proficiency to determine language support program placement. Because such programs can provide essential scaffolding, the policies guiding these assessments merit careful consideration. It is well accepted that quality assessments must be valid (representative of the…
Descriptors: English (Second Language), Second Language Learning, Second Language Instruction, Student Placement
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Cook, Thomas D.; Steiner, Peter M.; Pohl, Steffi – Multivariate Behavioral Research, 2009
This study uses within-study comparisons to assess the relative importance of covariate choice, unreliability in the measurement of these covariates, and whether regression or various forms of propensity score analysis are used to analyze the outcome data. Two of the within-study comparisons are of the four-arm type, and many more are of the…
Descriptors: Statistical Bias, Reliability, Data Analysis, Regression (Statistics)