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)quasi-experimental designs
B)true experimental designs
C)statistical designs
D)preexperimental designs

Question

Quizplus · Accepted Answer

Pretest-posttest control group and Solomon four-group designs are both true experimental designs because they involve random assignment of test units to experimental groups and treatments to those groups. Quasi-experimental designs do not involve random assignment, statistical designs refer to the use of statistical tools in data analysis, and preexperimental designs lack random assignment to either experimental or control groups.

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