방법 비교

	이중 눈가림 솔로몬 4집단 설계	전후 검사 실험 설계
분야	실험설계	실험설계
계열	Process / pipeline	Process / pipeline
기원 연도	1949 (Solomon design); double-blind blinding integrated in 20th-century experimental practice	1963 (formalized in Campbell & Stanley)
창시자	Richard L. Solomon (base design); double-blind protocol is a general methodological standard	Donald T. Campbell and Julian C. Stanley
유형	True experimental design	Experimental / quasi-experimental research design
원전	Solomon, R. L. (1949). An extension of control group design. Psychological Bulletin, 46(2), 137–150.	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
별칭	double-blind S4GD, blinded Solomon design, double-blind four-group design, Solomon four-group with double-blind	pretest-posttest design, before-after design, pre-post design, two-wave experimental design
관련	5	5
요약	The double-blind Solomon four-group design combines Richard Solomon's classic four-group structure — which isolates pretest sensitization effects — with double-blind blinding, ensuring that neither participants nor outcome assessors know group assignments. This combination yields high internal validity by controlling simultaneously for testing effects, expectancy bias, and experimenter influence, making it one of the most rigorous true experimental designs available.	The pretest-posttest experimental design measures participants on the outcome variable before and after treatment, typically with random assignment to treatment and control groups. The difference between pre- and post-scores isolates the treatment effect from baseline variation, making this one of the most widely used frameworks in experimental and quasi-experimental research across education, psychology, medicine, and the social sciences.