A researcher is conducting a clinical trial for a new drug and wants to assess the consistency of the measurements obtained from a particular diagnostic test. Which statistical concept refers to the reproducibility of a test's results when repeatedly applied to the same individual or sample?
✓ Correct Answer: Option C
Reliability refers to the consistency or reproducibility of a measurement. A reliable test yields similar results when repeated under the same conditions. Validity refers to whether a test measures what it intends to measure.