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	AB-design	Multipel baslinjedesign
Ämnesområde	Försöksplanering	Försöksplanering
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1960s	1968
Upphovsperson	Murray Sidman; Baer, Wolf & Risley	Donald M. Baer, Montrose M. Wolf, Todd R. Risley
Typ	Single-subject experimental design	Single-subject experimental design
Ursprungskälla	Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology. Basic Books.	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.
Alias	baseline-intervention design, AB single-case design, AB phase design	MBD, multiple-baseline single-case design, staggered baseline design, multiple-probe design
Närliggande	4	4
Sammanfattning	The AB design is the simplest single-subject experimental design, consisting of two sequential phases: a baseline phase (A) in which the target behavior is observed under natural conditions without intervention, followed by an intervention phase (B) in which the treatment or manipulation is introduced. Changes in the behavior's level, trend, or variability between phases are used to infer the effect of the intervention on the individual participant.	The multiple baseline design is a single-subject experimental design that demonstrates functional control by introducing an intervention at staggered time points across two or more baselines — typically across different behaviors, individuals, or settings. Because no withdrawal of treatment is required, it is especially suitable when the target behavior is irreversible or when removing an effective intervention would be unethical.