مقایسهٔ روش‌ها

	طرح آزمایشی تک‌نابین پیش‌آزمون-پس‌آزمون	طرح آزمایشی پیش‌آزمون-پس‌آزمون
حوزه	طراحی آزمایش	طراحی آزمایش
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1963 (systematic codification); blinding in use from early 20th century	1963 (formalized in Campbell & Stanley)
پدیدآور	Campbell & Stanley (codified); blinding practice has earlier roots in clinical research	Donald T. Campbell and Julian C. Stanley
نوع	Controlled experimental design with partial blinding	Experimental / quasi-experimental research design
منبع بنیادین	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.
نام‌های دیگر	single-masked pretest-posttest design, participant-blind pretest-posttest, single-blind before-after design, SB-PP design	pretest-posttest design, before-after design, pre-post design, two-wave experimental design
مرتبط	6	5
خلاصه	The single-blind pretest-posttest experimental design combines two protective strategies: measuring outcomes both before and after treatment to quantify change, and keeping participants unaware of which condition they are in. This pairing controls for preexisting group differences and expectancy-driven response bias, making it a practical middle ground between fully open-label and double-blind trials in behavioral and health research.	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.