The Solomon four-group design has
A) two experimental and two control groups.
B) three experimental groups and one control group.
C) two pretest groups and two posttest groups.
D) four experimental groups.
E) four control groups.

Question

Quizplus · Accepted Answer

The Solomon four-group design has two experimental and two control groups. This design is used to investigate the possible effects of pretesting on posttest measures in experimental research. The two experimental groups receive both pretest and treatment, while the two control groups do not receive any pretest or treatment. This allows researchers to compare the outcomes of the experimental and control groups with and without pretesting, to determine the potential impact of pretesting on the study results.

The Solomon Four-Group Design Has