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Download full textvon Davier, Matthias; Xu, Xueli; Carstensen, Claus H. – Educational Testing Service, 2009
A general diagnostic model was used to specify and compare two multidimensional item-response-theory (MIRT) models for longitudinal data: (a) a model that handles repeated measurements as multiple, correlated variables over time (Andersen, 1985) and (b) a model that assumes one common variable over time and additional orthogonal variables that…
Descriptors: Models, Item Response Theory, Longitudinal Studies, Measurement
Educational Testing Service, 2008
The Test of English as a Foreign Language[TM], better known as TOEFL[R], is designed to measure the English-language proficiency of people whose native language is not English. TOEFL scores are accepted by more than 6,000 colleges, universities, and licensing agencies in 130 countries. The test is also used by governments, and scholarship and…
Descriptors: English (Second Language), Language Proficiency, Language Tests, Computer Assisted Testing
Direct linkEducational Testing Service, 2006
Innovations, ETS's corporate magazine, provides information on educational assessment for educators, school leaders, researchers and policymakers around the world. Each issue of Innovations focuses on a particular theme in assessment. This issue reports on how new technologies in classrooms around the world are enhancing teaching, learning and…
Descriptors: Foreign Countries, Educational Assessment, Writing Evaluation, Periodicals
