Σύγκριση μεθόδων

	Πειραματικός Σχεδιασμός Προ-ελέγχου-Μετα-ελέγχου	Σχεδιασμός Πειράματος με Ομάδα Ελέγχου
Πεδίο	Πειραματικός Σχεδιασμός	Πειραματικός Σχεδιασμός
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1963 (formalized in Campbell & Stanley)	1935 (Fisher); 1963 (Campbell & Stanley codification)
Δημιουργός	Donald T. Campbell and Julian C. Stanley	Ronald A. Fisher; systematised by Donald T. Campbell & Julian C. Stanley
Τύπος	Experimental / quasi-experimental research design	Experimental research design
Θεμελιώδης πηγή	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.
Εναλλακτικές ονομασίες	pretest-posttest design, before-after design, pre-post design, two-wave experimental design	controlled experiment, true experimental design, randomized controlled design, treatment-control design
Συναφείς	5	4
Σύνοψη	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.	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.