Validity
For a selection tool to be useful, it is not sufficient for it to be repeatable or stable. Both legally and organizationally, the measures that it yields must also be valid. There are many way of assessing validity, but all of them focus on two issues. Validity addresses the questions of what a test measures and how well it has measured it. In selection, the primary concern is whether the assessment technique results in accurate predictions about the future success of failure of an applicant