So sánh phương pháp

	Thử nghiệm A/B đơn mù	Kiểm định A/B bị chặn
Lĩnh vực	Thiết kế thí nghiệm	Thiết kế thí nghiệm
Họ	Process / pipeline	Process / pipeline
Năm ra đời	mid-20th century (blinded RCT framework); A/B test nomenclature ~1990s–2000s	1926 (blocking principle); 2000s–2010s (online A/B testing application)
Người khởi xướng	Fisher, R. A. (randomisation basis); blinding practice formalised in clinical trials mid-20th century	R. A. Fisher (blocking principle); adapted to online A/B testing by industry practitioners
Loại	Controlled experiment with partial blinding	Randomized controlled experiment with variance reduction
Công trình gốc	Kohavi, R., Tang, D., & Xu, Y. (2020). Trustworthy Online Controlled Experiments: A Practical Guide to A/B Testing. Cambridge University Press. ISBN: 978-1108724265	Fisher, R. A. (1926). The arrangement of field experiments. Journal of the Ministry of Agriculture of Great Britain, 33, 503–513.
Tên gọi khác	single-masked A/B test, single-blind split test, blinded two-condition experiment, participant-blind A/B test	block-randomized A/B test, stratified A/B test, blocked split test, block-design A/B experiment
Liên quan	6	4
Tóm tắt	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.	A blocked A/B test is an experimental design that partitions units (users, subjects, or clusters) into homogeneous blocks before randomly assigning them to treatment A or treatment B within each block. Blocking reduces within-experiment noise by ensuring that known sources of variation — such as device type, geography, or user tenure — are balanced across conditions, yielding more precise estimates of the treatment effect than a simple unblocked A/B test.