In everyday language, the term validity is typically used to describe something as being trustworthy or legit. It's meaning in psychology suggests something similar—it's all about whether we can trust ...

Objective: To provide additional validity data for the Asthma Control Test TM (ACT) using a different criterion measure, setting, and population. Study Design: Cross-sectional survey. Methods: ...

Background Self-report instruments to assess physical activity are still the most feasible option in many population-wide surveys, and often need to be very short owing to resource constraints. The ...