Test security is not an end in itself; it is important because we want to be able to make valid interpretations from test scores. In this article, I propose a framework for comprehensive test security systems: prevention, detection, investigation, and resolution. The article discusses threats to test security, roles and responsibilities, rigorous…

An example application of portfolio assessment was developed and the model and estimates of reliability derived from the literature were then used to estimate the characteristics of an operational large-scale portfolio assessment program. Costs were estimated to put results in a realistic context. (SLD)