مقایسهٔ روش‌ها

	طراحی آزمایشی تک‌موضوعی مقدماتی AB	طراحی ABAB
حوزه	طراحی آزمایش	طراحی آزمایش
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1960s (AB design); pilot framing formalized in practice by 1980s–1990s	1960s (Sidman 1960; Baer et al. 1968)
پدیدآور	Murray Sidman; Baer, Wolf & Risley (AB logic); pilot application emergent from single-subject research practice	Murray Sidman; Baer, Wolf & Risley (applied behavior analysis formalization)
نوع	Single-subject pilot experimental design	Single-subject experimental design
منبع بنیادین	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.
نام‌های دیگر	pilot AB phase design, preliminary AB design, exploratory AB single-case design, feasibility AB design	reversal design, withdrawal design, ABAB reversal, operant reversal design
مرتبط	6	4
خلاصه	A pilot AB design applies the two-phase baseline-then-intervention structure of the AB single-subject design in an explicitly exploratory or feasibility mode — before committing to a more rigorous reversal or multiple-baseline study. The researcher collects repeated baseline (A) and intervention (B) data from one or a few individuals primarily to test measurement procedures, estimate effect size, verify data stability, and determine whether a stronger single-case design is warranted and feasible.	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.