The English learner (EL) student population has grown steadily for the past 20 years. During this time, the use of standardized assessments has increased as well. Teacher understanding of assessment accommodations that best support ELs is low, despite the research that shows the unreliability of standardized achievement tests that measure the…

We use a natural experiment to show that the presence of an external examiner has both a direct and an indirect negative effect on the performance of monitored classes in standardized educational tests. The direct effect is the difference in the test performance between classes of the same school with and without external examiners. The indirect…

Recent studies indicate that examiners make a number of intentional and unintentional errors when administering reading assessments to students. Because these errors introduce construct-irrelevant variance in scores, the fidelity of test administrations could influence the results of evaluation studies. To determine how assessment fidelity is…