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Item Response Theory2
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Educational and Psychological…2
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Kalinowski, Steven T.1
Köller, Olaf1
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Nagy, Gabriel1
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A Graphical Method for Displaying the Model Fit of Item Response Theory Trace Lines
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Kalinowski, Steven T. – Educational and Psychological Measurement, 2019
Item response theory (IRT) is a statistical paradigm for developing educational tests and assessing students. IRT, however, currently lacks an established graphical method for examining model fit for the three-parameter logistic model, the most flexible and popular IRT model in educational testing. A method is presented here to do this. The graph,…
Descriptors: Item Response Theory, Educational Assessment, Goodness of Fit, Probability
A Semiparametric Approach for Modeling Not-Reached Items
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List, Marit Kristine; Köller, Olaf; Nagy, Gabriel – Educational and Psychological Measurement, 2019
Tests administered in studies of student achievement often have a certain amount of not-reached items (NRIs). The propensity for NRIs may depend on the proficiency measured by the test and on additional covariates. This article proposes a semiparametric model to study such relationships. Our model extends Glas and Pimentel's item response theory…
Descriptors: Educational Assessment, Item Response Theory, Multivariate Analysis, Test Items