방법 비교

	실용적 AB 설계	ABAB 설계
분야	실험설계	실험설계
계열	Process / pipeline	Process / pipeline
기원 연도	1968 (AB single-case design); pragmatic framing formalized ~2000s–2010s	1960s (Sidman 1960; Baer et al. 1968)
창시자	Rooted in applied behavior analysis (Baer, Wolf, Risley, 1968); pragmatic framing developed across clinical and educational single-case research traditions	Murray Sidman; Baer, Wolf & Risley (applied behavior analysis formalization)
유형	Single-case experimental design	Single-subject experimental design
원전	Kazdin, A. E. (2011). Single-Case Research Designs: Methods for Clinical and Applied Settings (2nd ed.). Oxford University Press. ISBN: 978-0195341881	Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology. Basic Books.
별칭	pragmatic single-case AB design, real-world AB design, AB phase design, naturalistic AB design	reversal design, withdrawal design, ABAB reversal, operant reversal design
관련	4	4
요약	The Pragmatic AB Design is a single-case experimental design that collects repeated measurements of one individual or unit across two consecutive phases: a baseline phase (A) with no intervention, followed by an intervention phase (B). Deployed in real-world, clinically feasible conditions rather than tightly controlled laboratory settings, it is widely used in behavioral health, rehabilitation, education, and applied psychology to generate actionable evidence about individual-level treatment effects.	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.