The nurse researcher is using an instrument that provides similar results each time it's implemented. Which term should the researcher use to describe the quality of this instrument?
1. Validity
2. Reliability
3. Consistency
4. Variability
Correct Answer: 2
Rationale 1: Validity is the degree to which an instrument measures what it is supposed to measure.
Rationale 2: Reliability is the degree of consistency with which an instrument measures a concept or variable. If it is reliable, repeated measurement of the same variable should yield similar or nearly similar results.
Rationale 3: Consistency is a component of reliability.
Rationale 4: Variability does not describe instrument measurement, but variances in data.
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