Compară metode

	Design Experimental Crossover Pretest-Posttest	Designul Pătrat Latin și Pătrat Greco-Latin
Domeniu	Design experimental	Design experimental
Familie	Process / pipeline	Hypothesis test
Anul apariției	1963 (Campbell & Stanley framework); crossover methodology formalized 1980s–2000s	1935
Autorul original	Donald T. Campbell & Julian C. Stanley (pretest-posttest framework); Stephen Senn (crossover trial methodology)	Ronald A. Fisher
Tip	Within-subjects experimental design	Parametric blocked ANOVA
Sursa seminală	Senn, S. (2002). Cross-over Trials in Clinical Research (2nd ed.). Wiley. ISBN: 978-0471496533	Montgomery, D. C. (2017). Design and Analysis of Experiments (9th ed.). Wiley. ISBN: 978-1119492443
Denumiri alternative	within-subjects pretest-posttest design, repeated-measures crossover design, AB/BA pretest-posttest design, crossover repeated-measures design	Latin Square, Greco-Latin Square, Latin Kare ve Greco-Latin Kare Deseni
Înrudite	5	5
Rezumat	A crossover pretest-posttest experimental design is a within-subjects experiment in which each participant receives two or more treatments in a randomized sequence, with outcome measurements taken both before and after each treatment period. By serving as their own control across conditions, participants allow direct intra-individual comparison, dramatically increasing statistical power while reducing the sample size required relative to a parallel-group design.	The Latin square design is a blocked experimental design that simultaneously controls two independent nuisance factors — the row block and the column block — so that each treatment appears exactly once in every row and every column of an n×n arrangement. Formalised by Ronald A. Fisher in his 1935 monograph The Design of Experiments, the design dramatically reduces experimental error by absorbing variation from two extraneous sources before the treatment effects are estimated.