Validation of test scores involves collecting evidence and developing an argument that supports a particular use (i.e., an inference or decision) of the test scores. For a validity argument to be correct, it must be supported by evidence and be logical and coherent. There are various types of evidence that can be used to support a validity argument, including content-related validity evidence, criterion-related validity evidence, and evidence related to reliability and dimensional structure. The type of evidence needed to support the use of the test scores depends on the type of inference or decision being made. As such, test scores can only be said to be valid for a particular use. If multiple inferences or decisions are to be made based on a set of ...
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