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…

Our nation's bleak economic situation has forced state governments to cut educational funding. While funds are decreasing, accountability for student achievement remains high. The No Child Left Behind Act (NCLB) forces each state to create and implement an accountability system of rewards and sanctions based on standardized test scores. In…