CDISC-Gloss – Establishing the extent to which the scores of a clinical outcome assessment instrument are related to a known gold standard measure of the same concept. For most COAs clinical outcome assessments (COAs), criterion validity cannot be measured because there is no gold standard. [NIH-FDA BEST (Biomarkers, Endpoints, and other Tools) Resource, https://www.ncbi.nlm.nih.gov/books/NBK338448/] See also Validation.