A detailed description of five latent structure models of achievement measurement is presented. The first project paper, by David L. McArthur, analyzes the history of mental testing to show how conventional item analysis procedures were developed, and how dissatisfaction with them has led to fragmentation. The range of distinct conceptual and…

Scales constructed under procedures and criteria outlined by the various traditional and latent trait methods were examined as to whether they varied in characteristics related to scale quality. Scales were constructed from a common pool of items analyzed in full form according to Likert and a one-parameter Rasch model for non-dichotomous data.…

Five methods of equating minimum-competency tests were compared using the Florida Statewide Student Assessment Test, Part II, for 1984 and 1986. Four of five methods yielded essentially comparable results for the highest scoring 84% of the students. Different lengths of anchor items were compared, using the concurrent item response theory equating…

In this study, simulated and actual Air Force test data were used to compare the different procedures for equating mental tests: conventional (equipercentile and linear), Item Response Theory (IRT), and strong true-score theory (STST); data collection designs used were single-group, equivalent-groups, and anchor test. Equating transformations were…

This paper presents an introduction to the use of latent trait models for the estimation of domain scores. It was shown that these models provided an advantage over classical test theory and binomial error models in that unbiased estimates of true domain scores could be obtained even when items were not randomly selected from a universe of items.…

Three different item-bank maintenance procedures were compared for the purpose of investigating their cumulative effects on a series of longitudinal equatings of tests measuring the same characteristic. Item data used resulted from Rasch one-parameter latent trait test calibrations. Comparison of the results in the various final banks were made.…

The problems associated with misclassifying students when pass-fail decisions are based on test scores are discussed. One protection against misclassification is to set a confidence interval around the cutting score. Those whose scores fall above the interval are passed; those whose scores fall below the interval are failed; and those whose scores…