Sounds like the accuracy testing should be blind but isn't. Why not? It seems like disclosing that a sample is a test is more likely to negatively affect the a

Sounds like the accuracy testing should be blind but isn't. Why not? It seems like disclosing that a sample is a test is more likely to negatively affect the accuracy of the test than improve it. The need for double blind trials is normally well understood. This is not an experiment, but as a test it seems like it would benefit from at least single blind: lab is unaware - accuracy tests are mixed randomly into the genuine population of testing requests. Kind of like how the TSA is occasionally tested by inspectors who bring all sorts of weapons through.