手法を比較

	単盲検ABAデザイン	ABAB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	1968 (ABA design); single-blind adaptation developed through 1970s–1980s clinical behavioral research	1960s (Sidman 1960; Baer et al. 1968)
提唱者	Montrose Wolf, Donald Baer, Todd Risley (ABA tradition); single-blind masking adapted from clinical trial methodology	Murray Sidman; Baer, Wolf & Risley (applied behavior analysis formalization)
種類	Single-subject experimental design with assessor blinding	Single-subject experimental design
原典	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.
別名	single-blind reversal design, single-masked ABA design, single-blind withdrawal design, assessor-blind ABA design	reversal design, withdrawal design, ABAB reversal, operant reversal design
関連	5	4
概要	The single-blind ABA design combines the three-phase reversal logic of the ABA single-subject design — baseline (A1), intervention (B), and withdrawal (A2) — with single-blind masking, in which outcome assessors are kept unaware of the current phase or treatment condition while the participant and intervention team remain aware. This blinding reduces observer bias in behavioral measurement across the three phases.	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.