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Investigation of IRT-Based Equating Methods in the Presence of Outlier Common Items
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Hu, Huiqin; Rogers, W. Todd; Vukmirovic, Zarko – Applied Psychological Measurement, 2008
Common items with inconsistent b-parameter estimates may have a serious impact on item response theory (IRT)--based equating results. To find a better way to deal with the outlier common items with inconsistent b-parameters, the current study investigated the comparability of 10 variations of four IRT-based equating methods (i.e., concurrent…
Descriptors: Item Response Theory, Item Analysis, Computer Simulation, Equated Scores
Some Uses of Structural Equation Modeling in Validity Studies: Extending IRT to External Variables Using SIMS Results. Research on Instructional Assessment: Instructionally Relevant Psychometrics.
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Muthen, Bengt – 1986
The use of new extension of standard Item Response Theory (IRT) modeling of dichotomous items to include external variables is proposed. External variables may appear both as categorical grouping variables and as continuous variables; this requires the formulation of a model for the relationships between the external variables and the response…
Descriptors: Achievement Tests, Algebra, Computer Simulation, Grade 8