手法を比較

	単盲検ABABデザイン	AB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 (ABAB logic); single-blind adaptation formalized in applied behavior analysis from 1970s onward	1960s
提唱者	B. F. Skinner (reversal logic); blinding conventions adapted from clinical trial methodology	Murray Sidman; Baer, Wolf & Risley
種類	Single-case experimental design with partial blinding	Single-subject experimental design
原典	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.
別名	single-blind reversal design, single-masked ABAB design, blinded single-case reversal design, single-blind withdrawal design	baseline-intervention design, AB single-case design, AB phase design
関連	5	4
概要	The single-blind ABAB design is a single-case experimental approach that sequences two baseline phases (A) and two intervention phases (B) to demonstrate experimental control over a target behavior, while keeping one party — typically the outcome assessor or the participant — unaware of current phase assignment. This blinding procedure reduces observer bias or demand characteristics, strengthening the internal validity of the reversal logic.	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.