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	Progettazione ABA	Progettazione ABAB
Campo	Disegno sperimentale	Disegno sperimentale
Famiglia	Process / pipeline	Process / pipeline
Anno di origine	1968	1960s (Sidman 1960; Baer et al. 1968)
Ideatore	Montrose Wolf, Donald Baer, Todd Risley (applied behavior analysis tradition)	Murray Sidman; Baer, Wolf & Risley (applied behavior analysis formalization)
Tipo	Single-subject experimental design	Single-subject experimental design
Fonte seminale	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.
Alias	reversal design, withdrawal design, ABA withdrawal design	reversal design, withdrawal design, ABAB reversal, operant reversal design
Correlati	4	4
Sintesi	The ABA design is a single-subject experimental design that demonstrates experimental control through three sequential phases: a baseline phase (A1), an intervention phase (B), and a return-to-baseline withdrawal phase (A2). By removing the intervention in the final phase and observing whether behavior reverts toward baseline levels, researchers establish a functional relationship between the treatment and the target behavior for an individual participant.	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.