手法を比較

	ABデザイン	ABAデザイン
分野	実験計画法	実験計画法
系統	Process / pipeline	Process / pipeline
提唱年	1960s	1968
提唱者	Murray Sidman; Baer, Wolf & Risley	Montrose Wolf, Donald Baer, Todd Risley (applied behavior analysis tradition)
種類	Single-subject experimental design	Single-subject experimental design
原典	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.
別名	baseline-intervention design, AB single-case design, AB phase design	reversal design, withdrawal design, ABA withdrawal design
関連	4	4
概要	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 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.