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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
Rogers, H. Jane; Hambleton, Ronald K. – 1987
Although item bias statistics are widely recommended for use in test development and test analysis work, problems arise in their interpretation. The purpose of the present research was to evaluate the validity of logistic test models and computer simulation methods for providing a frame of reference for item bias statistic interpretations.…
Descriptors: Computer Simulation, Evaluation Methods, Item Analysis, Latent Trait Theory

McKinley, Robert L. – Journal of Educational Measurement, 1988
Six procedures for combining sets of item response theory (IRT) item parameter estimates from different samples were evaluated using real and simulated response data. Results support use of covariance matrix-weighted averaging and a procedure using sample-size-weighted averaging of estimated item characteristic curves at the center of the ability…
Descriptors: College Entrance Examinations, Comparative Analysis, Computer Simulation, Estimation (Mathematics)
Liu, Chao-Lin – Educational Technology & Society, 2005
The author analyzes properties of mutual information between dichotomous concepts and test items. The properties generalize some common intuitions about item comparison, and provide principled foundations for designing item-selection heuristics for student assessment in computer-assisted educational systems. The proposed item-selection strategies…
Descriptors: Test Items, Heuristics, Classification, Item Analysis