If a study lacks external validity, it necessarily lacks internal validity.

Question

Quizplus · Accepted Answer

While external and internal validity are related aspects of a study's overall validity, they are not necessarily dependent on each other. A study can have strong internal validity, meaning the results are reliable within the context of the study, but lacking external validity, meaning the results may not be generalizable to other populations or settings. Therefore, a study can lack external validity while still maintaining internal validity.

If a Study Lacks External Validity, It Necessarily Lacks Internal