The experimental and control groups should be comparable on
A)variables that are likely to be related to the independent variable under study.
B)variables that are likely to be related to the dependent variable under study.
C)age, education, and ethnicity.
D)variables that are likely to affect the pretest.
E)level of interest in the study.

Question

Quizplus · Accepted Answer

The experimental and control groups should be comparable on variables related to the dependent variable to ensure that any observed effects can be attributed to the independent variable rather than pre-existing differences.

The Experimental and Control Groups Should Be Comparable on