When comparing data derived from tests or questionnaires in cross-national studies, researchers commonly assume measurement invariance in their underlying scaling models. However, different cultural contexts, languages, and curricula can have powerful effects on how students respond in different countries. This article illustrates how the…

The National Assessment of Educational Progress (NAEP) makes possible comparison of groups of students and provides information about what these groups know and can do. The scale anchoring techniques described in this chapter address the latter purpose. The direct method and the smoothing method of scale anchoring are discussed. (SLD)

Standard and experimental forms of the Johnson O'Connor Research Foundations Analytical Reasoning test were administered to 1,496 clients of the Foundation (persons seeking information about aptitude for educational and career decisions). The objectives were to develop a new form of the test and to better understand what makes some items more…

This study examined agreement rates between identified strengths and weaknesses in shared abilities and influences on the Wechsler Intelligence Scale for Children-Revised (WISC-R) and the Kaufman Assessment Battery for Children (K-ABC). Sixty-seven students in the first through seventh grades referred for learning disabilities (LD) evaluation were…

The phenomenon of simultaneous differential item functioning (DIF) amplification and cancellation and the role of the SIBTEST computer program in detecting it were studied. A variety of simulated test data was generated for this purpose. In addition, the following real test data were used: (1) American College Testing program data for 2,115 males…

The effects of test performance of differentially written multiple-choice tests and test takers' cognitive style were studied for 47 graduate students and 35 public school and college teachers. Adhering to test-writing item guidelines resulted in mean scores basically the same for two groups of differing cognitive style. (SLD)

The Edmonton Grade III Achievement: 1956-1977 study is a comparison of achievement in reading, arithmetic, and language involving all of the third grade students in a large school system. Six basic skills tests which were administered to all of the Edmonton third grade students in 1956 were reprinted and administered to all of the third grade…

The Iowa Tests of Basic Skills were administered to over 600 black and white students in grades six through nine, to determine if the test showed bias against minorities. Outliers were identified from test results. Outliers are items which differ from the central core of test items because they fall outside the range expected from a random…