The desirability of test equating to maintain the same criterion standard from test administration to test administration has long been accepted for multiple choice tests. The same consistency of expectations is desirable for performance tests, especially if they are part of a licensure or certification process or used for other high stakes…

Compared the observation of children's growth in reading using grade equivalents with that using the Rasch simultaneous vertical equating procedure. Results from equating 25 reading tests show that grade equivalents differ more between two different test forms than do ability measures obtained from the Rasch simultaneous vertical equating. (SLD)

Presents empirically based item selection guidelines for moving the cut score on equated tests consisting of "n" dichotomous items calibrated assuming the Rasch model. Derivations of lemmas that underlie the guidelines are provided as well as a simulated example. (SLD)

Describes Rasch measurement procedures for equating multiple test forms or calibrating an item bank. The procedures entail: (1) selecting a data collection design; (2) estimating parameters; (3) transforming the parameters to a common scale; and (4) evaluating the quality of the linkage between the forms. (SLD)

Studied five factors that can affect the equating of scores from two tests onto a common score scale through the simulation and equating of 4,860 item data sets. Findings indicate three statistically significant two-way interactions for common item length and test length, item difficulty standard deviation and item distribution type, and item…