What is the difference between the nonequivalent group design and the pretest-posttest control-group design?
A) One has two groups of participants and the other has one group of participants.
B) One has a treatment group and the other doesn't.
C) One has random assignment and the other doesn't.
D) One has a measured DV and the other doesn't.

Question

Quizplus · Accepted Answer

The nonequivalent group design lacks random assignment, while the pretest-posttest control-group design includes random assignment to groups.

What Is the Difference Between the Nonequivalent Group Design and the Pretest-Posttest