Define reliability and validity in motor performance testing.

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Reliability and validity are about how trustworthy a motor performance test is. Reliability means the test gives stable, consistent results when you repeat it under the same conditions—same person, same setup, different trials or raters should yield similar scores. This is what you want so you’re not seeing random fluctuations.

Validity asks whether the test actually measures what it’s intended to measure. A valid motor test should reflect the specific attribute you care about (like sprint speed, jump power, or balance) and relate to other appropriate indicators of that attribute. You’d expect a valid sprint test to align with other sprint-related performance and to distinguish that ability from unrelated factors.

That’s why the description that reliability is about consistency of results and validity is about measuring the intended attribute is the best fit. The other statements mix up the concepts or redefine them incorrectly—for example, treating validity as speed or effort, claiming reliability and validity are the same, or saying validity means results are merely consistent.