In a Solomon four-group design,if there is no effect of the pretest,
A) the posttest scores will be different for all the groups.
B) the pretest scores will be different for all the groups.
C) the posttest scores will be the same in both control groups and in both experimental groups.
D) the posttest scores will not be affected by any manipulation.

Question

Quizplus · Accepted Answer

In a Solomon four-group design, if there is no effect of the pretest, the posttest scores will be the same in both control groups and in both experimental groups, as the pretest did not affect the posttest scores. The pretest scores may still differ between the groups, but this does not affect the posttest outcome. So option C is the best choice.

In a Solomon Four-Group Design,if There Is No Effect of the Pretest