השוואת שיטות

	ניסוי פקטוריאלי בצורת מעבר צולב	ניסוי מבוקר אקראי פקטוריאלי
תחום	תכנון ניסויים	תכנון ניסויים
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1920s–1960s (synthesis of factorial and crossover traditions)	1926 (Fisher factorial foundations); 2000s–2010s (clinical factorial RCT formalization)
הוגה השיטה	R. A. Fisher (factorial principles, 1920s); crossover integration developed in biostatistics through mid-20th century	R. A. Fisher (factorial design foundations); adapted into clinical trials via MOST framework (Collins et al., 2014)
סוג	Experimental design	Experimental trial design
מקור מכונן	Jones, B., & Kenward, M. G. (2014). Design and Analysis of Cross-Over Trials (3rd ed.). Chapman and Hall/CRC. ISBN: 978-1439861424	Collins, L. M., Dziak, J. J., Kugler, K. C., & Trail, J. B. (2014). Factorial experiments: Efficient tools for evaluation of intervention components. American Journal of Preventive Medicine, 47(4), 498–504.
כינויים	within-subject factorial design, repeated-measures factorial experiment, factorial crossover trial, crossover factorial trial	Factorial RCT, factorial trial, multi-factor RCT, factorial experiment with randomization
קשורות	5	6
תקציר	A crossover factorial experiment combines two powerful design principles: factorial structure, which studies multiple factors and their interactions simultaneously, and crossover structure, in which each participant receives more than one treatment combination across sequential periods. By serving as their own control, participants reduce between-subject variability, improving statistical power while also revealing how different factor levels interact within the same individual.	A factorial randomized controlled trial (factorial RCT) is an experimental design in which participants are randomly assigned to every possible combination of two or more independent factors (treatments or intervention components) simultaneously. This allows researchers to estimate the main effect of each factor and their interactions within a single, efficient trial, rather than running separate experiments for each factor.