The purpose of this article is to describe and demonstrate a three-step process of using differential distractor functioning (DDF) in a post hoc analysis to understand sources of differential item functioning (DIF) in multiple-choice testing. The process is demonstrated on two multiple-choice tests that used complex alternatives (e.g., "No…

The performance of three equating methods--the presmoothed equipercentile method, the item response theory (IRT) true score method, and the IRT observed score method--were examined based on three equating criteria: the same distributions property, the first-order equity property, and the second-order equity property. The magnitude of the…

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…

Results are presented, in the form of an annual report, of the standardized test performance of elementary and secondary school students in the Montgomery County Public Schools (MCPS), Rockville, Maryland. This year, as in the past, the report includes an update of the historical record of countywide test results on the Iowa Tests of Basic Skills…