The classical experimental design:
A)helps guard against the sources of internal and external validity.
B)helps guard against the sources of internal invalidity.
C)helps guard against the sources of external 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

Classical experimental design primarily helps guard against sources of internal invalidity by controlling variables to determine cause and effect relationships within the experiment.

The Classical Experimental Design