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	Kluster randomiserad kontrollgrupps experimentella design	Experimentell design med kontrollgrupp
Ämnesområde	Försöksplanering	Försöksplanering
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1990s (formal methodology development)	1935 (Fisher); 1963 (Campbell & Stanley codification)
Upphovsperson	Murray, D. M.; Donner, A. and Klar, N. (systematic formalization)	Ronald A. Fisher; systematised by Donald T. Campbell & Julian C. Stanley
Typ	Experimental design	Experimental research design
Ursprungskälla	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.
Alias	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
Närliggande	6	4
Sammanfattning	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.