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	डबल-ब्लाइंड कंट्रोल ग्रुप प्रायोगिक डिज़ाइन	नियंत्रित समूह प्रायोगिक अभिकल्प
क्षेत्र	प्रयोगात्मक अभिकल्प	प्रयोगात्मक अभिकल्प
परिवार	Process / pipeline	Process / pipeline
उद्भव वर्ष	1930s–1950s (formalized in clinical trial methodology)	1935 (Fisher); 1963 (Campbell & Stanley codification)
प्रवर्तक	R. A. Fisher (experimental control foundations); blinding practices evolved in clinical research through the 20th century	Ronald A. Fisher; systematised by Donald T. Campbell & Julian C. Stanley
प्रकार	Experimental research design	Experimental research design
मौलिक स्रोत	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.
उपनाम	double-blind controlled experiment, DB-CG design, double-masked controlled trial, double-blind controlled study	controlled experiment, true experimental design, randomized controlled design, treatment-control design
संबंधित	5	4
सारांश	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.	Control group experimental design is a fundamental experimental structure in which participants are assigned to at least two groups — a treatment group that receives the intervention and a control group that does not — so that the effect of the intervention can be isolated by comparing outcomes across groups. Randomisation of assignment strengthens causal inference by balancing known and unknown confounders.