The classical experimental design
A)helps guard against the sources of internal and external validity.
B)helps guard against the sources of external invalidity.
C)helps guard against the sources of internal invalidity.
D)cannot guard against the sources of either internal or external invalidity.
E)what it helps guard against depends upon the particular experiment.

Question

Quizplus · Accepted Answer

The classical experimental design is primarily designed to control for sources of internal invalidity by manipulating the independent variable to establish a cause-and-effect relationship with the dependent variable. However, it may not always be able to control for external invalidity.

The Classical Experimental Design