In large-scale assessments, such as state-wide testing programs, national sample-based assessments, and international comparative studies, there are many steps involved in the measurement and reporting of student achievement. There are always sources of inaccuracies in each of the steps. It is of interest to identify the source and magnitude of…

Items on test score scales located at and below the Proficient cut score define the content area knowledge and skills required to achieve proficiency. Alternately, examinees who perform at the Proficient level on a test can be expected to be able to demonstrate that they have mastered most of the knowledge and skills represented by the items at…

The No Child Left Behind Act allows states to vary (a) the trajectories they select to move from the baseline percent proficient or above in 2002 to the 100% proficient goal in 2014, (b) the minimum number of students required for reporting of disaggregated subgroup results, and (c) whether or not they will use confidence intervals when…

A conceptual analysis of gain scores and a technically sound procedure for using such scores to compare different instructional programs are presented. The procedure proposed makes use of an index called Rescaled and Adjusted Gains within Strata (RAGS), together with a flexible but explicit procedure for score analysis and reporting. (LC)