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Download full textVeldkamp, Bernard P. – 1998
In this paper, a mathematical programming approach is presented for the assembly of ability tests measuring multiple traits. The values of the variance functions of the estimators of the traits are minimized, while test specifications are met. The approach is based on Lagrangian relaxation techniques and provides good results for the two…
Descriptors: Ability, Estimation (Mathematics), Foreign Countries, Item Banks
Peer reviewedVan Der Linden, Wim J. – Educational and Psychological Measurement, 1983
This paper focuses on mixtures of two binomials with one known success parameter. It is shown how moment estimators can be obtained for the remaining unknown parameters of such mixtures, and results are presented from a Monte Carlo study carried out to explore the statistical properties of these estimators. (PN)
Descriptors: Educational Testing, Error of Measurement, Estimation (Mathematics), Guessing (Tests)
