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Peer reviewed
Direct linkBaghaei, Purya; Kubinger, Klaus D. – Practical Assessment, Research & Evaluation, 2015
The present paper gives a general introduction to the linear logistic test model (Fischer, 1973), an extension of the Rasch model with linear constraints on item parameters, along with eRm (an R package to estimate different types of Rasch models; Mair, Hatzinger, & Mair, 2014) functions to estimate the model and interpret its parameters. The…
Descriptors: Item Response Theory, Models, Test Validity, Hypothesis Testing
Baghaei, Purya; Carstensen, Claus H. – Practical Assessment, Research & Evaluation, 2013
Standard unidimensional Rasch models assume that persons with the same ability parameters are comparable. That is, the same interpretation applies to persons with identical ability estimates as regards the underlying mental processes triggered by the test. However, research in cognitive psychology shows that persons at the same trait level may…
Descriptors: Item Response Theory, Models, Reading Comprehension, Reading Tests
