Adaptive quadrature is applied to marginal maximum likelihood estimation for item response models with normal ability distributions. Even in one dimension, significant gains in speed and accuracy of computation may be achieved.

In item-response theory, if a latent-structure model has an ability variable, then elementary information theory may be employed to provide a criterion for evaluation of the information the test provides concerning ability. This criterion may be considered even in cases in which the latent-structure model is not valid, although interpretation of…

The Educational Testing Service is preparing to introduce a new generation of teacher assessments, the Praxis Series of professional assessments for beginning teachers. Preparatory to test development, a job analysis was conducted to define a knowledge and ability domain important for newly certified Spanish teachers to perform their jobs in a…