قارن الطرق

	تصميم خط الأساس المتعدد المتقاطع	تصميم ABAB
المجال	التصميم التجريبي	التصميم التجريبي
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1968 (multiple baseline origins); crossover extension developed in behavioral and rehabilitation research from the 1980s onward	1960s (Sidman 1960; Baer et al. 1968)
صاحب الطريقة	Derived from Baer, Wolf, and Risley (multiple baseline, 1968) and classical crossover design traditions	Murray Sidman; Baer, Wolf & Risley (applied behavior analysis formalization)
النوع	Single-case experimental design with crossover sequencing	Single-subject experimental design
المصدر التأسيسي	Baer, D. M., Wolf, M. M., & Risley, T. R. (1968). Some current dimensions of applied behavior analysis. Journal of Applied Behavior Analysis, 1(1), 91–97.	Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology. Basic Books.
الأسماء البديلة	CMBD, crossover MBD, multiple baseline crossover design, within-subject multiple baseline design	reversal design, withdrawal design, ABAB reversal, operant reversal design
ذات صلة	6	4
الملخص	The crossover multiple baseline design is a single-case experimental design (SCED) that layers crossover sequencing onto a multiple baseline structure. Across two or more tiers — participants, behaviors, or settings — baselines are staggered in time; then treatments are introduced and later reversed or alternated across tiers, so each tier acts as both a treatment and a control unit. The design provides within-subject replication while controlling for time-related confounds.	The ABAB design is a single-subject experimental methodology that establishes causal control by repeatedly introducing and removing an intervention. A baseline phase (A) is followed by an intervention phase (B), then a return to baseline (A), and a second intervention phase (B), allowing the researcher to demonstrate that observed behavior changes are produced by the intervention rather than by coincidental factors.