Concept of reliability in research9/12/2023 Thus, reliability and validity must be examined and reported, or references cited, for each assessment instrument used to measure study outcomes. Validity is not a property of the tool itself, but rather of the interpretation or specific purpose of the assessment tool with particular settings and learners.Īssessment instruments must be both reliable and valid for study results to be credible. Here validity refers to how well the assessment tool actually measures the underlying outcome of interest. For outcome measures such as surveys or tests, validity refers to the accuracy of measurement. Validity in research refers to how accurately a study answers the study question or the strength of the study conclusions.
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