(Scientific Advisory Committee of the Medical Outcomes Trust Assessing health status and quality-of-life instruments: Attributes and review criteria. What is Responsiveness? An instrument’s ability to detect change over time.What is Reliability? The degree to which an instrument can produce consistent results, and consistent results on different occasions, when there is no evidence of change.Assessing health status and quality-of-life instruments: attributes and review criteria. On the other hand, the validity assesses how. ![]() (Scientific Advisory Committee of the Medical Outcomes Trust. Applicability for audit purpose refers to whether the data, as collected, are valid measures of the underlying concepts being addressed in the audits. The difference between reliability and validity in assessment is that reliability measures the degree of consistency between test results. ![]()
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