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Direct linkEngelhard, George, Jr.; Perkins, Aminah F. – Measurement: Interdisciplinary Research and Perspectives, 2011
Humphry (this issue) has written a thought-provoking piece on the interpretation of item discrimination parameters as scale units in item response theory. One of the key features of his work is the description of an item response theory (IRT) model that he calls the logistic measurement function that combines aspects of two traditions in IRT that…
Descriptors: Foreign Countries, Social Sciences, Item Response Theory, Testing
Baker, Beverly A. – Assessing Writing, 2010
In high-stakes writing assessments, rater training in the use of a rating scale does not eliminate variability in grade attribution. This realisation has been accompanied by research that explores possible sources of rater variability, such as rater background or rating scale type. However, there has been little consideration thus far of…
Descriptors: Foreign Countries, Writing Evaluation, Writing Tests, Testing
