قارن الطرق

	تجربة معملية أحادية التعمية	تصميم التجربة بالمجموعة الضابطة
المجال	التصميم التجريبي	التصميم التجريبي
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	Late 19th century; codified in 20th-century clinical and behavioral research	1935 (Fisher); 1963 (Campbell & Stanley codification)
صاحب الطريقة	Formalized in experimental psychology and pharmacology; Peirce & Jastrow (1884) early instance	Ronald A. Fisher; systematised by Donald T. Campbell & Julian C. Stanley
النوع	Controlled experimental design	Experimental research design
المصدر التأسيسي	Shadish, W. R., Cook, T. D., & Campbell, D. T. (2002). Experimental and Quasi-Experimental Designs for Generalized Causal Inference. Houghton Mifflin. ISBN: 978-0395615560	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
الأسماء البديلة	single-masked laboratory study, participant-blind lab experiment, single-blind controlled lab study	controlled experiment, true experimental design, randomized controlled design, treatment-control design
ذات صلة	5	4
الملخص	A single-blind laboratory experiment is a controlled study conducted in a laboratory setting in which participants do not know which condition (e.g., treatment or control) they have been assigned to, while the researchers administering the conditions are aware. This masking of participants reduces demand characteristics and response bias without requiring full investigator blinding, and the controlled laboratory environment allows tight manipulation of independent variables and precise measurement of outcomes.	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.