What is reliability? What is validity? Why are test developers concerned with these concepts?
What will be an ideal response?
The ideal answer should include:
1. Reliability refers to consistency in measurement over time.
2. Validity means that a test measures what it is intended to measure.
3. Test developers are concerned with these concepts because they contribute to the soundness of the test.
4. If a test developer wants to measure something that should stay stable over time (such as personality or intelligence), the test should yield consistent results across administrations. Test developers are concerned with validity because they want to ensure that their tests accurately reflect the construct of interest.
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