विधियों की तुलना करें

	ब्लॉक्ड प्रीटेस्ट-पोस्टटेस्ट प्रायोगिक डिज़ाइन	पूर्व-परीक्षण-पश्चात-परीक्षण प्रायोगिक अभिकल्पना
क्षेत्र	प्रयोगात्मक अभिकल्प	प्रयोगात्मक अभिकल्प
परिवार	Process / pipeline	Process / pipeline
उद्भव वर्ष	1935 (blocking, Fisher); 1963 (pretest-posttest + blocking synthesis, Campbell & Stanley)	1963 (formalized in Campbell & Stanley)
प्रवर्तक	Donald T. Campbell & Julian C. Stanley (systematized); blocking technique from Ronald A. Fisher	Donald T. Campbell and Julian C. Stanley
प्रकार	Experimental design	Experimental / quasi-experimental research design
मौलिक स्रोत	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
उपनाम	blocked pre-post design, RBPP design, block-randomized pretest-posttest design, randomized block pre-post control group design	pretest-posttest design, before-after design, pre-post design, two-wave experimental design
संबंधित	6	5
सारांश	The blocked pretest-posttest experimental design combines blocking — grouping participants into homogeneous strata before randomization — with pre- and post-intervention measurement. Blocking controls for known sources of variability (e.g., baseline ability, gender, site), while the pretest-posttest structure quantifies change scores directly. Together, they reduce error variance and increase statistical power compared to a simple pretest-posttest design, making this approach well suited to educational, clinical, and behavioral intervention studies.	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.