Validity evidence based on test content is of essential importance in educational testing. One source for such evidence is an alignment study, which helps evaluate the congruence between tested objectives and those specified in the curriculum. However, the results of an alignment study do not always sufficiently capture the degree to which a test…

Educational tests used for accountability purposes must represent the content domains they purport to measure. When such tests are used to monitor progress over time, the consistency of the test content across years is important for ensuring that observed changes in test scores are due to student achievement rather than to changes in what the test…