You weigh yourself on 3 consecutive times on the same day mi

You weigh yourself on 3 consecutive times on the same day, minutes apart, and get the following readings: 175 lbs, 173 lbs, 176 lbs. Because your results do not seem to be consistent, the scale is said to lack __________________.

After many administrations, researchers administering a polygraph test begin to worry that the machine is actually measuring anxiety and not dishonest responses. Because the tool is not measuring what it is intended to measure, this tool is said to lack __________________.

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