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Peer reviewedKim, Seock-Ho; And Others – Psychometrika, 1994
Hierarchical Bayes procedures for the two-parameter logistic item response model were compared for estimating item and ability parameters through two joint and two marginal Bayesian procedures. Marginal procedures yielded smaller root mean square differences for item and ability, but results for larger sample size and test length were similar.…
Descriptors: Ability, Bayesian Statistics, Computer Simulation, Estimation (Mathematics)
Download full textCohen, Allan S.; Kim, Seock-Ho – 1993
Equating tests from different calibrations under item response theory (IRT) requires calculation of the slope and intercept of the appropriate linear transformation. Two methods have been proposed recently for equating graded response items under IRT, a test characteristic curve method and a minimum chi-square method. These two methods are…
Descriptors: Chi Square, Comparative Analysis, Computer Simulation, Equated Scores
