Reporting standard errors of equating has been advocated as a standard practice when conducting test equating. The two most widely applied procedures for standard errors of equating including the bootstrap method and the delta method are either computationally intensive or confined to the derivations of complicated formulas. In the current study,…

This study investigates the comparability of two item response theory based equating methods: true score equating (TSE), and estimated true equating (ETE). Additionally, six scaling methods were implemented within each equating method: mean-sigma, mean-mean, two versions of fixed common item parameter, Stocking and Lord, and Haebara. Empirical…

The comparison of scores from linguistically different tests is a twofold matter: the adaptation of tests and the comparison of scores. These 2 aspects of measurement invariance intersect at the need to guarantee the psychometric equivalence between the original and adapted versions. In this study, the authors examined comparability in 2 stages.…

Studied three common item response theory equating approaches to capturing academic growth using data from a statewide testing program: (1) linear transformation of separate calibrations; (2) fixed common item parameter calibration; and (3) concurrent calibration. Found differences in mean growth depending on ability estimate and equating…

Graduate Record Examination and Miller Analogies Test scores were equated using linear transformation and regression methods. Standard deviations of regression equivalence scores were consistently smaller than those actually obtained in the sample, whereas standard deviations of linear equivalence scores were the same as those in the sample.…

The utility of the biomedical model of adjusted statistics is demonstrated. The model is recommended for use by educational researchers to randomize subjects for a more accurate estimate of school programs' success or failure when compared across classrooms or other units. (Author/MH)