Question

The Solomon four-group design: a. combines the classical experimental design with the posttest-only control group design. b. combines the classical experimental design with the pretest-only control group design. c. combines the classical experimental design with the static-group comparison design. d. combines the static-group comparison design with the one-group pretest-posttest design. e. has not been explained by any of these choices.

Answer 1

a. combines the classical experimental design with the posttest-only control group design.

Step-by-step explanation:

The Solomon four-group design is a type of research design that employs a combination of pretest (before exposure to a treatment) and posttest (after exposure to a treatment) design. Therefore, it is considered a combination of the classical experimental design and the posttest-only control group design. The Solomon four-group design contains two extra control groups, which allows us to reduce the influence of confounding variables.