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	क्लस्टर रैंडमाइज्ड मल्टीपल बेसलाइन डिज़ाइन	ABAB डिज़ाइन
क्षेत्र	प्रयोगात्मक अभिकल्प	प्रयोगात्मक अभिकल्प
परिवार	Process / pipeline	Process / pipeline
उद्भव वर्ष	1990s–2000s	1960s (Sidman 1960; Baer et al. 1968)
प्रवर्तक	Extension of Baer, Wolf & Risley (1968) multiple baseline; cluster adaptation by Murray and colleagues (1990s)	Murray Sidman; Baer, Wolf & Risley (applied behavior analysis formalization)
प्रकार	Experimental design (single-subject / small-N with cluster randomization)	Single-subject experimental design
मौलिक स्रोत	Murray, D. M. (1998). Design and Analysis of Group-Randomized Trials. Oxford University Press. ISBN: 978-0195120424	Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology. Basic Books.
उपनाम	CR-MBD, cluster-randomized MBD, group-randomized multiple baseline, multilevel multiple baseline design	reversal design, withdrawal design, ABAB reversal, operant reversal design
संबंधित	5	4
सारांश	The cluster randomized multiple baseline design combines cluster-level random assignment with the logic of the multiple baseline design. Intact groups — such as classrooms, schools, or clinics — are randomly assigned to receive an intervention at staggered time points. This preserves the within-unit repeated-measure logic of the multiple baseline while adding the causal warrant of random assignment at the cluster level.	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.