When two groups in a nonequivalent control group design do not differ on the pretest,the researcher can conclude that
A) the two groups are equivalent.
B) the two groups are not equivalent on any dependent variables.
C) the two groups will show the same natural growth rate over the course of the study.
D) the two groups are equivalent only on the dependent variable measured on the pretest.

Question

Quizplus · Accepted Answer

The fact that two groups do not differ on the pretest suggests they are equivalent at that point in time on the specific dependent variable measured. It does not guarantee equivalence on all possible variables or future growth rates.

When Two Groups in a Nonequivalent Control Group Design Do