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van der Linden, Wim J. – Psychometrika, 1998
This paper suggests several item selection criteria for adaptive testing that are all based on the use of the true posterior. Some of the ability estimators produced by these criteria are discussed and empirically criticized. (SLD)
Descriptors: Ability, Adaptive Testing, Bayesian Statistics, Computer Assisted Testing
Peer reviewed Peer reviewed
Ogasawara, Haruhiko – Psychometrika, 1996
Rasch's multiplicative Poisson model is extended so that parameters for individuals in the prior gamma distribution have continuous covariates. Parameters for individuals are integrated out, and hyperparameters in the prior distribution are estimated by a numerical method separately from difficulty parameters that are treated as fixed parameters…
Descriptors: Ability, Equations (Mathematics), Estimation (Mathematics), Item Response Theory
Peer reviewed Peer reviewed
Fischer, Gerhard H. – Psychometrika, 1995
This paper addresses neglected questions in item response theory (IRT): measurement of ability or trait parameters and item difficulty in the Rasch model; measurement of individual change based on a Rasch test; and the general framework for detection of differential item functioning under the Mantel-Haenszel procedure. (SLD)
Descriptors: Ability, Change, Difficulty Level, Identification