পদ্ধতির তুলনা করুন

	ব্লকড ল্যাবরেটরি এক্সপেরিমেন্ট	এলোমেলো নিয়ন্ত্রিত পরীক্ষা (RCT)
ক্ষেত্র	পরীক্ষামূলক নকশা	পরীক্ষামূলক নকশা
পরিবার	Process / pipeline	Hypothesis test
উদ্ভবের বছর	1926–1935	1948
প্রবর্তক	Ronald A. Fisher	James Lind (early precursor, 1747); modern formulation: Austin Bradford Hill & Medical Research Council (1948)
ধরন	Controlled experimental design with blocking	Interventional comparative study
মৌলিক উৎস	Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd.	Schulz, K.F., Altman, D.G., Moher, D., for the CONSORT Group (2010). CONSORT 2010 Statement: Updated Guidelines for Reporting Parallel Group Randomised Trials. BMJ, 340, c332.
অপর নাম	blocked lab experiment, laboratory randomized block design, RBD laboratory study, blocked within-lab experiment	RCT, randomised controlled trial, clinical trial, Randomize Kontrollü Çalışma (RCT) Tasarımı
সম্পর্কিত	5	7
সারসংক্ষেপ	A blocked laboratory experiment is a controlled laboratory study in which experimental units are grouped into homogeneous blocks before treatment assignment, and treatments are then randomly assigned within each block. Blocking removes the influence of a known nuisance variable — such as participant batch, equipment run, or testing day — from the error term, increasing the precision of treatment comparisons without expanding sample size.	A randomized controlled trial (RCT) is the gold standard experimental design in clinical and health research, in which participants are randomly allocated to a treatment group or a control group so that the effect of an intervention can be measured with the highest possible degree of internal validity. The modern parallel-group RCT was formalized by Austin Bradford Hill and the Medical Research Council in their landmark streptomycin trial of 1948, and its reporting is governed today by the CONSORT 2010 guidelines (Schulz et al., 2010).