Predictive validity refers to the extent to which a test or assessment accurately forecasts future performance or outcomes. It is a crucial aspect of evaluating the effectiveness of tools like psychological tests, educational assessments, or employment selection processes. A test with high predictive validity will show a strong correlation between its results and the actual performance of individuals in real-world situations. To measure predictive validity, researchers often compare test scores with future achievements or behaviors. For example, a college entrance exam may be evaluated based on how well it predicts students' grades in their first year of college. This helps ensure that the assessment is a reliable indicator of future success.