Receiver Operating Characteristic Curve (ROC Curve)« Back to Glossary Index
Receiver Operating Characteristic Curve
A figure depicting the power of a diagnostic test. The ROC curve presents the test’s true-positive rate (i.e., sensitivity) on the horizontal axis and the false-positive rate (i.e., 1 – specificity) on the vertical axis for different cut-points dividing a positive from a negative test. An ROC curve for a perfect test has an area under the curve = 1.0 while a test that performs no better than chance has an area under the curve of only 0.5.