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UW Oshkosh Testing Services Supports:
Importance of Reliability and Validity:
The importance of a test achieving a reasonable level of reliability and validity cannot be overemphasized. To the extent a test lacks reliability, the meaning of individual scores is ambiguous. A score of 80, say, may be no different than a score of 70 or 90 in terms of what a student knows, as measured by the test. If a test is not reliable, it is not valid.