Scope and Method of Study: This study focused on the development and use of the AT-SAT test battery and the Initial En Route Qualification training course for the selection, training, and evaluation of air traffic controller candidates. The Pearson product moment correlation coefficient was used to measure the linear relationship between the…

Operational testing programs employing item response theory (IRT) applications benefit from of the property of item parameter invariance whereby item parameter estimates obtained from one sample can be applied to other samples (when the underlying assumptions are satisfied). In theory, this feature allows for applications such as computer-adaptive…

This study investigates whether the functions linking number-correct scores to the College-Level Examination Program (CLEP) scaled scores remain invariant over gender groups, using test data on the 16 testlet-based forms of the CLEP College Algebra exam. To be consistent with the operational practice, linking of various test forms to a common…

The discussion here covers five articles that are linked in the sense that they all treat population invariance. This discussion of population invariance is a somewhat broader treatment of the subject than simply a discussion of these five articles. In particular, occasional reference is made to publications other than those in this issue. The…

This article discusses the five studies included in this issue. Each article addressed the same topic, population invariance of equating. They all used data from major standardized testing programs, and they all used essentially the same statistics to evaluate their results, namely, the root mean square difference and root expected mean square…

Large-scale testing programs often require multiple forms to maintain test security over time or to enable the measurement of change without repeating the identical questions. The comparability of scores across forms is consequential: Students are admitted to colleges based on their test scores, and the meaning of a given scale score one year …

A method for equating test scores between two standardized achievement testing programs was developed. The first test was the Survey of Basic Skills (SBS) published by Science Research Associates. The second was the Tests of Individual Performance (TIP) of the Portland Public Schools in Oregon. Scores reported in Rasch units (RIT) from the TIP…

The adequacy of linking statewide standardized test results to the National Assessment of Educational Progress by using equipercentile equating procedures was investigated using statewide mathematics data from four states. Results suggest that the linkings are not sufficiently trustworthy to make comparisons based on the tails of the distribution.…

Statistical equating of scores from direct writing assessments is performed in Maryland to hold the difficulty of passing the Maryland Writing Test (MWT) equivalent from year to year and to allow a demonstration of growth in student writing achievement over the years. Passage of the test is a high school graduation requirement. Prior to…

A study involving all students taking the California Achievement Test (CAT) in the Cleveland City School District (Ohio) during the fall of 1989 was conducted to assess the effects of the use of parallel test forms. Each spring, all students in grades 4, 6, and 8 are selected to take the appropriate level of the CAT reading test, Form E. As a…

In June 1989, third, sixth, and ninth graders in Alberta (Canada) were administered standardized tests in English, Social Studies, and Science, respectively. This report presents results of these tests at each grade level and by gender, with comparative data from 1985. Data for 31,998 third graders (English), 29,918 sixth graders (social studies),…

All second- and third-grade students in California public schools were tested in reading achievement, and all sixth and twelfth grade students were tested in reading, written expression, spelling, and mathematics. Second- and third-grade achievement gains were reported on the California Reading Assessment Program Reading Test over an eleven-year…