Question

A research study in a laboratory setting incorporates four randomized groups (two control and two experimental) in which only one experimental/control group set is pretested while all four groups are posttested. This design represents ___________ research design.

Answer 1

Answer: The correct answer is Solomon four-group design.

Explanation: The Solomon four-group design is a research design in which the four groups of the research have different experiences,

1- The first group is Pretested,

2- The second group or control group is pretested as well,

3- The third group receives treatment and then is post-tested.

4- The fourth group receives no treatment, is post-tested.

This design is done to acknowledge the influence of pretesting in posttest results.

In conclusion, the research design is experimental and its called Solomon four-group design.