قارن الطرق

	تصميم AB المحظور	تصميم التجربة على الفرد الواحد
المجال	التصميم التجريبي	التصميم التجريبي
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1970s–1980s (systematic development of blocked randomization in single-case research)	1960s (Sidman 1960; formal applied codification by Kazdin and Baer in 1970s–1980s)
صاحب الطريقة	Based on Fisher's randomized block principle (1926) applied to single-case AB designs	Murray Sidman (foundational tactics); B. F. Skinner (applied behavior analysis lineage)
النوع	Single-subject experimental design with blocking	Experimental research design
المصدر التأسيسي	Edgington, E., & Onghena, P. (2007). Randomization Tests (4th ed.). Chapman and Hall/CRC. ISBN: 978-1584885894	Kazdin, A. E. (1982). Single-Case Research Designs: Methods for Clinical and Applied Settings. Oxford University Press. ISBN: 978-0195030440
الأسماء البديلة	blocked AB single-case design, randomized block AB design, AB design with blocking, blocked baseline-treatment design	SSED, single-case experimental design, n-of-1 design, intrasubject replication design
ذات صلة	6	6
الملخص	The Blocked AB Design applies the logic of randomized block experimental design to the classic single-subject AB framework. Observation sessions are organized into blocks — matched sets of time points or contextual units — and the assignment of baseline (A) and treatment (B) phases is randomized within each block. This controls for nuisance time-based variability while preserving the interpretive simplicity of the fundamental two-phase single-case structure.	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.