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	Experimentell design med faktoriell kontrollgrupp	Experimentell design med kontrollgrupp
Ämnesområde	Försöksplanering	Försöksplanering
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1926–1935	1935 (Fisher); 1963 (Campbell & Stanley codification)
Upphovsperson	Ronald A. Fisher	Ronald A. Fisher; systematised by Donald T. Campbell & Julian C. Stanley
Typ	Experimental design	Experimental research design
Ursprungskälla	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.
Alias	factorial controlled experiment, factorial design with control, factorial RCT with control arm, multi-factor controlled experiment	controlled experiment, true experimental design, randomized controlled design, treatment-control design
Närliggande	6	4
Sammanfattning	A factorial control group experimental design crosses two or more independent variables (factors) in a fully factorial structure while including at least one condition that serves as a no-treatment or standard-treatment control. This allows researchers to simultaneously estimate the main effect of each factor, their interactions, and the size of those effects relative to a meaningful baseline, maximising both causal precision and experimental efficiency.	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.