multitrait-multimethod

The multitrait-multimethod approach is a way researchers assess the validity of measurements by examining different traits (qualities or characteristics) across various methods (ways of measuring). For example, to evaluate a person's honesty and kindness, they might use self-reports, observer ratings, and behavioral tests. By comparing results across these methods for each trait, researchers can determine if the measurements are accurate and reliable. This approach helps distinguish whether differences are due to actual traits or the way they are measured, ensuring a clearer understanding of the traits being studied.