This study examined the reliability of three methods for detecting differential item functioning (DIF) (i.e., the Mantel-Haenszel method, the standardization method, and the logistic regression method) applied to achievement test data. In addition, the study examined the influences of different sources of error variance, including examinee,…

This two-year study explored the academic lives of three boys in a combined fifth-sixth grade classroom. As these case studies illustrate, viewing students' academic worlds from multiple perspectives can lead to more accurate, comprehensive evaluations and efficacious adaptations of students' learning environments. Richard Snow's aptitude theory…

One of the consequences of Ohio's educational accountability efforts mandated under Ohio Senate Bill 55 (SB 55) and the traditional testing programs of Ohio school districts is the generation of huge amounts of data. In order for school-based educators to organize and explore these voluminous amounts of information, they need exposure to…

The Rasch model was used to compare the grade equivalent scores which students of equal ability would have obtained, had they taken different levels of the Iowa Tests of Basic Skills (ITBS). Raw scores on items common to levels 9-14 of the ITBS (vocabulary subtest) were obtained from 6,000 students in Dallas, Texas. Rasch scales were used to…

The 1992-93 school year marked the first year of implementation of the statewide mandate of the Arizona Student Assessment Program (ASAP), which revised previous legislation. Iowa Test of Basic Skills testing requirements were restricted to grades 2 and 7, and districts were allowed greater flexibility in their own testing, which had previously…

This paper isolates and examines separately three distinct sources of error in essay scores: lack of agreement between raters; inconsistencies in performance within mode of discourse, and inconsistencies in performance between modes of discourse. Essay prompts in the Iowa Tests of Basic Skills (ITBS) Writing Supplement were designed to assess…

This paper highlights measurement issues faced when attempting to assess and interpret results of a school improvement project. Based on the assumption that to measure effectiveness, one must measure a wide variety of school factors, the paper presents a broad perspective on measurement problems and dilemmas in analyzing norm-referenced test data…

This study is based on data from a state-wide assessment that included both multiple-choice and constructed-response items. The intent of the study was to see whether item types make a difference in gender results. The items on both tests were categorized according to whether they assessed procedural knowledge, concepts, problem solving, or…