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What is the difference between validity and reliability?
Validity is the honesty and accuracy of a test. It determines the strength of a relationship between a performance component and a test to design that component.For example, strength is the performance component and the handgrip dynamometer test is the test designed for that component. Reliability is the degreee of consistency of a test. This aims to produce the same results on successive occasions. For example, a 50 m sprint is reliable, as it is performed under the same conditions, repeating the same test.