To which principle of causality is the concept of internal validity most closely related?
A) covariation between proposed cause and effect
B) time precedence of the cause
C) absence of plausible alternative explanations for the effect of the independent variable
D) demonstration of the effect of the independent variable in a variety of settings

Question

Quizplus · Accepted Answer

Internal validity refers to the extent to which a study is able to demonstrate that the independent variable caused the observed changes in the dependent variable, without the influence of other factors. Therefore, internal validity is most closely related to the principle of absence of plausible alternative explanations for the effect of the independent variable.

To Which Principle of Causality Is the Concept of Internal