Σύγκριση μεθόδων

	Σχεδιασμός Solomon τεσσάρων ομάδων διπλής τυφλής μεθόδου	Πειραματικός Σχεδιασμός Παραγόντων
Πεδίο	Πειραματικός Σχεδιασμός	Πειραματικός Σχεδιασμός
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1949 (Solomon design); double-blind blinding integrated in 20th-century experimental practice	1926–1935
Δημιουργός	Richard L. Solomon (base design); double-blind protocol is a general methodological standard	Ronald A. Fisher
Τύπος	True experimental design	Quantitative experimental design
Θεμελιώδης πηγή	Solomon, R. L. (1949). An extension of control group design. Psychological Bulletin, 46(2), 137–150.	Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd.
Εναλλακτικές ονομασίες	double-blind S4GD, blinded Solomon design, double-blind four-group design, Solomon four-group with double-blind	factorial design, factorial ANOVA design, multi-factor experiment, crossed-factor design
Συναφείς	5	6
Σύνοψη	The double-blind Solomon four-group design combines Richard Solomon's classic four-group structure — which isolates pretest sensitization effects — with double-blind blinding, ensuring that neither participants nor outcome assessors know group assignments. This combination yields high internal validity by controlling simultaneously for testing effects, expectancy bias, and experimenter influence, making it one of the most rigorous true experimental designs available.	A factorial experiment is an experimental design in which two or more independent variables (factors) are manipulated simultaneously, and every combination of their levels is tested. Introduced by Ronald Fisher in the 1920s–1930s, it is the standard approach whenever a researcher needs to detect not only the main effect of each factor but also whether the effect of one factor depends on the level of another — the interaction effect.