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von Davier, Matthias – ETS Research Report Series, 2016
This report presents results on a parallel implementation of the expectation-maximization (EM) algorithm for multidimensional latent variable models. The developments presented here are based on code that parallelizes both the E step and the M step of the parallel-E parallel-M algorithm. Examples presented in this report include item response…
Descriptors: Psychometrics, Mathematics, Models, Statistical Analysis
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Gu, Lin; Turkan, Sultan; Gomez, Pablo Garcia – ETS Research Report Series, 2015
ELTeach is an online professional development program developed by Educational Testing Service (ETS) in collaboration with National Geographic Learning. The ELTeach program consists of two courses: English-for-Teaching and Professional Knowledge for English Language Teaching (ELT). Each course includes a coordinated assessment leading to a score…
Descriptors: Item Analysis, Test Items, English (Second Language), Second Language Instruction