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Person Response Functions and the Definition of Units in the Social Sciences
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Engelhard, 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
Re-Conceptualizing Validity within the Context of a New Measure of Mathematical Knowledge for Teaching
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Engelhard, George, Jr.; Sullivan, Rubye K. – Measurement: Interdisciplinary Research and Perspectives, 2007
In this journal issue, the authors of the focus articles have provided a suite of very stimulating and thoughtful articles. The overarching purpose of this research is to explore the application of principles derived from the view of validity proposed by Kane (2004) to their research on issues related to the measurement of mathematical knowledge…
Descriptors: Test Validity, Psychometrics, Test Construction, Evaluation Research
The Measurement of Writing Ability with a Many-Faceted Rasch Model.
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Engelhard, George, Jr. – Applied Measurement in Education, 1992
A Many-Faceted Rasch Model (FACETS) for measurement of writing ability is described, and its use in solving measurement problems in large-scale assessment is illustrated with a random sample of 1,000 students from Georgia's Eighth Grade Writing Test. It is a promising approach to assessment through written compositions. (SLD)
Descriptors: Educational Assessment, Essays, Evaluation Problems, Grade 8