Topic overview

Start with the big picture

This introduction focuses on the role of test-performance measures in screening and diagnostic epidemiology. These measures provide a framework for describing how test results relate to the presence or absence of a condition. Understanding the framework helps learners approach questions about test evaluation and interpretation in a structured way. The available source snapshot does not specify individual measures or detailed lesson headings, so this preview stays at the topic level. The full lesson develops the subject further, providing a deeper treatment of how performance measures are used when considering screening and diagnostic tests.