ecological validity definition
In research, the ecological validity of a study means that the methods, materials and setting of the study must approximate the real-world that is being examined. Unlike internal and external validity, ecological validity is not necessary to the overall validity of a study.
Test validity is the extent to which a test (such as a chemical, physical, or scholastic test) accurately measures what it purports to measure.alidity is generally considered the most important issue in psychological and educational testing because it concerns the meaning placed on test results.