In questions, a highly sensitive and specific method is referred to as which type of method?

• A. Screening Method
• B. Reference Method
• C. Qualitative Method
• D. Semi-quantitative Method

Answer: (B)

The concept here is using a standard that serves as the benchmark for accuracy and reliability. A reference method is designed to be the most accurate and precise, validated and traceable to standard references, so it provides the definitive measurement against which other methods are evaluated. In clinical chemistry, this is the method you rely on to confirm results and to calibrate or validate other assays. A highly sensitive and specific method is ideal as the reference because it minimizes both false negatives and false positives, giving a true representation of the analyte.

Screening methods aim to detect almost all real cases (high sensitivity) but can yield more false positives due to lower specificity, so they’re not the definitive standard. Qualitative methods only indicate presence or absence, not a precise measurement. Semi-quantitative methods give approximate ranges rather than an exact value, which doesn’t meet the standard of a reference method.