An experimental group should be identical to a control group in every way except one: the manipulation of the independent variable.

Question

Quizplus · Accepted Answer

This statement is true. In order to accurately measure the effect of the independent variable on the dependent variable, the experimental group must be nearly identical to the control group except for the manipulation of the independent variable. This helps to eliminate any potential confounding variables and strengthens the internal validity of the experiment.

An Experimental Group Should Be Identical to a Control Group