Which one of the following is true?
A)A study's external validity is always limited by its internal validity.
B)A study's external validity can sometimes be limited by its internal validity.
C)A study's external validity is never limited by its internal validity.
D)A study's internal validity is always limited by its external validity.

Question

Quizplus · Accepted Answer

A study's external validity is always limited by its internal validity is the correct statement.
If one cannot conclude that there is a causal relationship between a study's independent and dependent variable, there is no way that you can say that the results of the study can be generalized to other populations or settings. Thus, internal validity always comes first, and after that, possibly, external validity.

Which One of the Following Is True