So sánh phương pháp

	Thiết kế thử nghiệm nhóm đối chứng mù đôi	Thiết kế thực nghiệm đo lường trước và sau can thiệp
Lĩnh vực	Thiết kế thí nghiệm	Thiết kế thí nghiệm
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1930s–1950s (formalized in clinical trial methodology)	1963 (formalized in Campbell & Stanley)
Người khởi xướng	R. A. Fisher (experimental control foundations); blinding practices evolved in clinical research through the 20th century	Donald T. Campbell and Julian C. Stanley
Loại	Experimental research design	Experimental / quasi-experimental research design
Công trình gốc	Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd.	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
Tên gọi khác	double-blind controlled experiment, DB-CG design, double-masked controlled trial, double-blind controlled study	pretest-posttest design, before-after design, pre-post design, two-wave experimental design
Liên quan	5	5
Tóm tắt	A double-blind control group experimental design is a rigorous experimental structure in which participants are randomly assigned to at least one treatment group and one control group, while both the participants and the researchers collecting or assessing outcomes are kept unaware of group assignment. By combining allocation concealment with blinding at two levels, the design minimizes expectancy bias, placebo effects, and assessor bias simultaneously, making it a cornerstone of high-quality intervention research in medicine, psychology, and the social sciences.	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.