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Applied Measurement in…1
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Chunyan Liu1
Raja Subhiyah1
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Impact of Violating Unidimensionality on Rasch Calibration for Mixed-Format Tests
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Chunyan Liu; Raja Subhiyah; Richard A. Feinberg – Applied Measurement in Education, 2024
Mixed-format tests that include both multiple-choice (MC) and constructed-response (CR) items have become widely used in many large-scale assessments. When an item response theory (IRT) model is used to score a mixed-format test, the unidimensionality assumption may be violated if the CR items measure a different construct from that measured by MC…
Descriptors: Test Format, Response Style (Tests), Multiple Choice Tests, Item Response Theory