পদ্ধতির তুলনা করুন

	প্রাগম্যাটিক কন্ট্রোল গ্রুপ পরীক্ষামূলক নকশা	প্রিটেস্ট-পোস্টটেস্ট পরীক্ষামূলক নকশা
ক্ষেত্র	পরীক্ষামূলক নকশা	পরীক্ষামূলক নকশা
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	1967 (seminal distinction); 2009 (PRECIS operationalization)	1963 (formalized in Campbell & Stanley)
প্রবর্তক	Schwartz & Lellouch (pragmatic vs explanatory distinction); extended by PRECIS framework (Thorpe et al.)	Donald T. Campbell and Julian C. Stanley
ধরন	Experimental design (pragmatic variant)	Experimental / quasi-experimental research design
মৌলিক উৎস	Schwartz, D., & Lellouch, J. (1967). Explanatory and pragmatic attitudes in therapeutical trials. Journal of Chronic Diseases, 20(8), 637–648.	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
অপর নাম	pragmatic controlled trial, effectiveness trial with control group, real-world control group design, pragmatic comparative design	pretest-posttest design, before-after design, pre-post design, two-wave experimental design
সম্পর্কিত	6	5
সারসংক্ষেপ	A pragmatic control group experimental design tests whether an intervention works under routine, real-world conditions by comparing it against a control condition — typically usual care or an active comparator — rather than a tightly controlled placebo. It prioritises external validity and applicability over the internal purity of an explanatory efficacy trial, asking whether an intervention makes a meaningful difference to people as they are actually treated in practice.	The pretest-posttest experimental design measures participants on the outcome variable before and after treatment, typically with random assignment to treatment and control groups. The difference between pre- and post-scores isolates the treatment effect from baseline variation, making this one of the most widely used frameworks in experimental and quasi-experimental research across education, psychology, medicine, and the social sciences.