Pretest- posttest control group and Solomon four- group designs are distinguished by the fact that the researcher can randomly assign test units to experimental groups and also randomly assign treatments to experimental groups.
A) preexperimental designs
B) statistical designs
C) true experimental designs
D) quasi- experimental designs

Question

Quizplus · Accepted Answer

True experimental designs, such as the pretest-posttest control group and Solomon four-group designs, involve random assignment of test units to experimental groups and treatments, ensuring high internal validity.

Pretest- Posttest Control Group and Solomon Four- Group Designs Are