قارن الطرق

	تجربة ميدانية مزدوجة التعمية	تجربة ميدانية عاملية
المجال	التصميم التجريبي	التصميم التجريبي
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1960s onward (field experiment tradition); double-blind controls applied from 1970s in social and policy field trials	1920s–1935 (Fisher's foundational work); widely applied through 20th century
صاحب الطريقة	Fisher, R. A. (randomized field trials); double-blind practice traced to 19th-century clinical research, formalized for field settings by Campbell & Stanley (1963)	Ronald A. Fisher (factorial principle); extended to field settings in agricultural and social sciences
النوع	Experimental design	Experimental design
المصدر التأسيسي	Gerber, A. S., & Green, D. P. (2012). Field Experiments: Design, Analysis, and Interpretation. W. W. Norton. ISBN: 978-0393979954	Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd.
الأسماء البديلة	double-masked field trial, double-blind naturalistic experiment, blinded field study, DB field experiment	factorial design in the field, field factorial design, multi-factor field trial, factorial field trial
ذات صلة	5	5
الملخص	A double-blind field experiment combines the high external validity of a real-world field setting with double-blind masking, in which neither the participants nor the personnel delivering the treatment know who has been assigned to the treatment or control condition. This design controls simultaneously for participant expectation effects and for experimenter/enumerator demand effects, making it one of the most rigorous tools available for causal inference outside the laboratory.	A factorial field experiment applies factorial experimental design — simultaneously manipulating two or more independent factors across all combinations of their levels — in a real-world field setting rather than a controlled laboratory. It allows researchers to estimate both main effects and interaction effects of multiple factors on an outcome under ecologically valid conditions, making findings directly relevant to practice.