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Instrumentation (Evidence Rating Element)

The measures used in a study. The instrumentation quality is dependent on the measures’ reliability and validity. Reliability refers to the degree to which a measure is consistent or gives very similar results each time it is used, and validity refers to the degree to which a measure is able to scientifically answer the question it is intended to answer. Instrumentation is a component considered within Internal Validity. See Program Review and Rating from Start to Finish for more information.