Validity of Measurement Test Validity refers to how well our measuring strategy measures succeeds.
Some variables can be difficult to measure.
A valid measure is one that accurately measures the specific variable. I design a test for creativity where subjects list as many uses for a paper clip as possible. I designate subjects who list more than 30 uses as creative. This is a test with construct validity . If my theory is wrong, or if my measure is not a logical application of the theory, then the measure is not valid.