The aim of the study was to examine common items in mixed format (e.g., multiple-choices and essay items) contain parameter drifts test equating processes performed with item non-equivalent groups design. In this study, which carried out using Monte Carlo simulation a fully crossed design, factors length (30 50), sample size (1000 3000), ratio 40%), drift (IPD) (20 30%), location tests (at begi...

The purpose of this study was to compare the equating errors item and ability parameters obtained by performing scale transformation methods two multidimensional test forms under various conditions. Sample size (1000-2000), common ratio (20% 40%), correlation between dimensions (0.1-0.5-0.9) parameter estimation model (2PLM-3PLM) were taken as research Equating error (RMSE) used examine accurac...

The present study aims to compare the Kernel equating and local methods in observed score equating. Functions error estimates regarding difference between raw equated scores by Stocking-Lord Haebara true-score were examined Item Response Theory Observed Score Equating. Therefore, 5, 10, 15 external anchor items used, obtained from two forms based on 2PL model. R (version 3.5.3.) programming sof...

iii Brennan Equity The notion of equity in equating was introduced by Lord (1980. pp. 195ff). The basic idea is that for any true score on Form Y, the distribution of observed scores on Form Y should be the same as the distribution of converted scores on Form X (see Kolen & Brennan, 2004. pp. 10–11). If this goal is achieved, Lord argued, then it should be a matter of indifference to each and e...

As part of its nonprofit mission, ETS conducts and disseminates the results of research to advance quality and equity in education and assessment for the benefit of ETS's constituents and the field. To obtain a PDF or a print copy of a report, please visit: Abstract The nonequivalent groups with anchor test (NEAT) design involves missing data that are missing by design. Three popular equating m...

The passing rate of the Medical Licensing Examination has been variable, which probably originated from the difference in the difficulty of items and/or difference in the ability level of examinees. We tried to explain the origin of the difference using the test equating method based on the item response theory. The number of items and examinees were 500, 3,647 in 2003 and 550, 3,879 in 2004. C...

A significant problem with most functional data analyses is that of misaligned curves. Without adjustment, even an analysis as simple as estimation of the mean will fail. One common method to synchronize a set of curves involves equating “landmarks” such as peaks or troughs. The landmarks method can work well but will fail if marker events can not be identified or are missing from some curves. ...