مقایسهٔ روش‌ها

	طرح آزمایشی تک‌نابینای AB	طراحی آزمایشی تک‌موضوعی
حوزه	طراحی آزمایش	طراحی آزمایش
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1960s (AB methodology); blinding adaptation in single-case research developed from 1970s onward	1960s (Sidman 1960; formal applied codification by Kazdin and Baer in 1970s–1980s)
پدیدآور	Murray Sidman; Baer, Wolf & Risley (AB logic); blinding conventions adapted from clinical trial methodology	Murray Sidman (foundational tactics); B. F. Skinner (applied behavior analysis lineage)
نوع	Single-subject experimental design with assessor masking	Experimental research design
منبع بنیادین	Kazdin, A. E. (2011). Single-Case Research Designs: Methods for Clinical and Applied Settings (2nd ed.). Oxford University Press. ISBN: 9780195341881	Kazdin, A. E. (1982). Single-Case Research Designs: Methods for Clinical and Applied Settings. Oxford University Press. ISBN: 978-0195030440
نام‌های دیگر	assessor-blind AB design, single-masked AB single-case design, observer-blind AB phase design	SSED, single-case experimental design, n-of-1 design, intrasubject replication design
مرتبط	6	6
خلاصه	The single-blind AB design is a single-subject experimental design that combines the two-phase AB structure — a baseline phase (A) followed by an intervention phase (B) — with assessor or observer masking. The individual collecting or rating outcome data is kept unaware of which phase is being measured, preventing knowledge of treatment status from biasing behavioral observations or ratings. The design improves on the standard AB design by reducing detection bias while retaining the practical and ethical advantages of single-subject methodology.	Single-subject experimental design (SSED) establishes experimental control by repeatedly measuring one individual (or a small number of individuals) across baseline and intervention phases, using the participant as their own control. Instead of comparing groups, it compares the participant's own behavior across conditions over time. Widely used in applied behavior analysis, special education, rehabilitation, and clinical psychology, SSED allows causal inference from small or unique samples where group designs are impractical.