قارن الطرق

	تصميم التجربة العشوائية العنقودية ذات المجموعة الضابطة	تصميم التجربة بالمجموعة الضابطة
المجال	التصميم التجريبي	التصميم التجريبي
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1990s (formal methodology development)	1935 (Fisher); 1963 (Campbell & Stanley codification)
صاحب الطريقة	Murray, D. M.; Donner, A. and Klar, N. (systematic formalization)	Ronald A. Fisher; systematised by Donald T. Campbell & Julian C. Stanley
النوع	Experimental design	Experimental research design
المصدر التأسيسي	Donner, A., & Klar, N. (2000). Design and Analysis of Cluster Randomization Trials in Health Research. Arnold. ISBN: 978-0340691533	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
الأسماء البديلة	CRCT with control group, group-randomized trial, cluster RCT control group design, community randomized controlled trial	controlled experiment, true experimental design, randomized controlled design, treatment-control design
ذات صلة	6	4
الملخص	A cluster randomized control group experimental design randomly assigns intact groups (clusters) — such as schools, clinics, or communities — rather than individuals to treatment or control conditions. At least one cluster group receives no active intervention, serving as the control. This design is essential when individual randomization is impractical or contamination between participants in close proximity is likely.	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.