手法を比較

	適応型単純無作為抽出	単純無作為抽出法
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1990–1992	Early 20th century; systematized by Cochran 1953/1977
提唱者	Steven K. Thompson	William Gosset, Jerzy Neyman, and formalized by William Cochran
種類	Probability-based adaptive sampling design	Probability sampling design
原典	Thompson, S. K. (1992). Sampling. John Wiley & Sons. ISBN: 978-0471548850	Cochran, W. G. (1977). Sampling Techniques (3rd ed.). John Wiley & Sons. ISBN: 978-0471162407
別名	ASRS, adaptive SRS, adaptive random sampling, sequential adaptive sampling	SRS, unrestricted random sampling, equal-probability sampling, EPSEM
関連	5	6
概要	Adaptive simple random sampling (ASRS) begins with a conventional simple random sample and then expands the sample in regions where the variable of interest exceeds a pre-specified threshold. Units neighboring a qualifying observation are added to the sample, allowing the design to concentrate effort where the population is dense or rare, while retaining unbiased estimation through the Horvitz-Thompson or Hansen-Hurwitz estimators. The approach was systematized by Steven K. Thompson in the early 1990s as part of the broader adaptive sampling framework.	Simple random sampling (SRS) is the foundational probability sampling method in which every unit in the population has an equal and independent chance of being selected. Because selection is governed purely by chance, SRS eliminates systematic bias, supports unbiased estimation of population parameters, and provides the statistical baseline against which all more complex probability designs are evaluated.