Accuracy and Reliability of Tests

Accuracy and reliability are key to evaluating tests. Accuracy refers to how close a test result is to the true value or condition—like how precisely a thermometer measures your temperature. Reliability means the test consistently produces similar results under the same conditions—if repeated, it should give similar outcomes. A highly accurate test correctly identifies the presence or absence of a condition, while a reliable test yields dependable, consistent results. Both are important: accuracy ensures correctness, and reliability ensures consistency, helping healthcare providers make informed decisions.