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	Enkelblind A/B-test	AB-design
Ämnesområde	Försöksplanering	Försöksplanering
Familj	Process / pipeline	Process / pipeline
Ursprungsår	mid-20th century (blinded RCT framework); A/B test nomenclature ~1990s–2000s	1960s
Upphovsperson	Fisher, R. A. (randomisation basis); blinding practice formalised in clinical trials mid-20th century	Murray Sidman; Baer, Wolf & Risley
Typ	Controlled experiment with partial blinding	Single-subject experimental design
Ursprungskälla	Kohavi, R., Tang, D., & Xu, Y. (2020). Trustworthy Online Controlled Experiments: A Practical Guide to A/B Testing. Cambridge University Press. ISBN: 978-1108724265	Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology. Basic Books.
Alias	single-masked A/B test, single-blind split test, blinded two-condition experiment, participant-blind A/B test	baseline-intervention design, AB single-case design, AB phase design
Närliggande	6	4
Sammanfattning	A single-blind A/B test is a controlled two-condition experiment in which participants are randomised to condition A (control) or condition B (treatment) but are kept unaware of which condition they have received, while researchers and analysts remain aware. The blind prevents participants from changing their behaviour in response to knowledge of their assignment, reducing demand characteristics and response bias while still allowing the investigator to monitor the trial.	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.