The Solomon four-group design is a pretest-posttest design where
A) the experimental and control groups are randomly assigned.
B) there are two experimental and control groups, one that takes the pretest and one that does not take the pretest.
C) a historical event is used at the "treatment."
D) none of the above.

Question

Quizplus · Accepted Answer

The Solomon four-group design includes two experimental groups and two control groups, with one of each taking a pretest and the other not, to control for pretest sensitization effects.

The Solomon Four-Group Design Is a Pretest-Posttest Design Where