So sánh phương pháp

	Thiết kế AB	Thiết kế ABAB
Lĩnh vực	Thiết kế thí nghiệm	Thiết kế thí nghiệm
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1960s	1960s (Sidman 1960; Baer et al. 1968)
Người khởi xướng	Murray Sidman; Baer, Wolf & Risley	Murray Sidman; Baer, Wolf & Risley (applied behavior analysis formalization)
Loại	Single-subject experimental design	Single-subject experimental design
Công trình gốc	Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology. Basic Books.	Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology. Basic Books.
Tên gọi khác	baseline-intervention design, AB single-case design, AB phase design	reversal design, withdrawal design, ABAB reversal, operant reversal design
Liên quan	4	4
Tóm tắt	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 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.