قارن الطرق

	تصميم تجريبي مزدوج التعمية أحادي الحالة	تصميم AB
المجال	التصميم التجريبي	التصميم التجريبي
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1970s–1980s (systematic integration of blinding into SCED)	1960s
صاحب الطريقة	Barlow, Hersen, and colleagues (single-subject tradition); double-blind masking adapted from clinical trial methodology	Murray Sidman; Baer, Wolf & Risley
النوع	Experimental single-subject design with double-blind masking	Single-subject experimental design
المصدر التأسيسي	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.
الأسماء البديلة	double-blind SCED, double-blind single-case experimental design, masked single-subject design, double-blind N-of-1 design	baseline-intervention design, AB single-case design, AB phase design
ذات صلة	5	4
الملخص	A double-blind single-subject experimental design applies systematic masking — concealing treatment assignment from both the participant and the outcome assessor — within a within-person repeated-measures framework. It is used when researchers need strong causal inference about an intervention's effect on a single individual while guarding against placebo responses and observer bias. Particularly prominent in pharmacological, behavioral, and clinical rehabilitation research.	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.