পদ্ধতির তুলনা করুন

	গবেষণাগার পরীক্ষা	নিয়ন্ত্রণ গোষ্ঠী পরীক্ষামূলক নকশা
ক্ষেত্র	পরীক্ষামূলক নকশা	পরীক্ষামূলক নকশা
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	17th century (natural science); ~1879 onward (behavioral/social science)	1935 (Fisher); 1963 (Campbell & Stanley codification)
প্রবর্তক	Francis Bacon, Robert Boyle (early scientific method); formalized in social science by Wilhelm Wundt (1879 psychology lab) and Ronald A. Fisher (20th-century design principles)	Ronald A. Fisher; systematised by Donald T. Campbell & Julian C. Stanley
ধরন	Experimental quantitative design	Experimental research design
মৌলিক উৎস	Shadish, W. R., Cook, T. D., & Campbell, D. T. (2002). Experimental and Quasi-Experimental Designs for Generalized Causal Inference. Houghton Mifflin. ISBN: 978-0395615560	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
অপর নাম	lab experiment, controlled experiment, true experiment, lab study	controlled experiment, true experimental design, randomized controlled design, treatment-control design
সম্পর্কিত	5	4
সারসংক্ষেপ	A laboratory experiment is a research design in which the investigator systematically manipulates one or more independent variables under tightly controlled conditions, randomly assigns participants to conditions, and measures the effect on dependent variables. By maximizing internal control, the laboratory experiment is the gold standard for establishing cause-and-effect relationships. It is the backbone of experimental psychology, cognitive science, pharmacology, and many social sciences.	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.