So sánh phương pháp

	Thử nghiệm ngẫu nhiên hóa theo cụm trong phòng thí nghiệm	Thí nghiệm phòng thí nghiệm theo khối
Lĩnh vực	Thiết kế thí nghiệm	Thiết kế thí nghiệm
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1990s (formalized; cluster randomization principles developed in 1970s-1980s)	1926–1935
Người khởi xướng	David M. Murray (group-randomized trial methodology); built on classical cluster sampling in experimental design	Ronald A. Fisher
Loại	Controlled laboratory experiment with cluster-level randomization	Controlled experimental design with blocking
Công trình gốc	Murray, D. M. (1998). Design and Analysis of Group-Randomized Trials. Oxford University Press. ISBN: 978-0195120363	Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd.
Tên gọi khác	cluster-randomized lab experiment, group-randomized laboratory study, cluster RCT laboratory variant, clustered lab trial	blocked lab experiment, laboratory randomized block design, RBD laboratory study, blocked within-lab experiment
Liên quan	6	5
Tóm tắt	A cluster randomized laboratory experiment assigns intact groups — such as lab sections, cohorts, or naturally formed teams — rather than individual participants, to experimental conditions. All participants within a cluster receive the same treatment. The design is used when individual randomization would cause contamination between conditions, while retaining the controlled environment of a laboratory setting.	A blocked laboratory experiment is a controlled laboratory study in which experimental units are grouped into homogeneous blocks before treatment assignment, and treatments are then randomly assigned within each block. Blocking removes the influence of a known nuisance variable — such as participant batch, equipment run, or testing day — from the error term, increasing the precision of treatment comparisons without expanding sample size.