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Direct linkTaylor, Catherine S.; Lee, Yoonsun – Applied Measurement in Education, 2010
Item response theory (IRT) methods are generally used to create score scales for large-scale tests. Research has shown that IRT scales are stable across groups and over time. Most studies have focused on items that are dichotomously scored. Now Rasch and other IRT models are used to create scales for tests that include polytomously scored items.…
Descriptors: Measures (Individuals), Item Response Theory, Robustness (Statistics), Item Analysis
Sofroniou, Nick; Kellaghan, Thomas – Journal of Educational Measurement, 2004
To examine the predictive utility of three scales provided in the released database of the Third International Mathematics and Science Study (TIMSS) (international plausible values, standardized percent correct score, and national Rasch score), information was obtained on the performance in state examinations in mathematics and science in 1996…
Descriptors: Foreign Countries, Predictive Validity, National Competency Tests, Mathematics Tests
