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Impact of Both Local Item Dependencies and Cut-Point Locations on Examinee Classifications
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Rubright, Jonathan D. – Educational Measurement: Issues and Practice, 2018
Performance assessments, scenario-based tasks, and other groups of items carry a risk of violating the local item independence assumption made by unidimensional item response theory (IRT) models. Previous studies have identified negative impacts of ignoring such violations, most notably inflated reliability estimates. Still, the influence of this…
Descriptors: Performance Based Assessment, Item Response Theory, Models, Test Reliability