เปรียบเทียบวิธี

	การสุ่มตัวอย่างแบบความแปรปรวนสูงสุดภาคสนาม	Maximum Variation Sampling
สาขาวิชา	ระเบียบวิธีสำรวจ	ระเบียบวิธีสำรวจ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1990 (Patton); field application established through ecological and ethnographic practice in the 1990s–2000s	1985 (Lincoln & Guba); elaborated 1990–2002 (Patton)
ผู้ริเริ่ม	Michael Quinn Patton (maximum variation sampling); adapted for field research contexts	Lincoln & Guba; systematised by Michael Quinn Patton
ประเภท	Purposive qualitative/mixed-methods sampling strategy	Purposive qualitative sampling strategy
แหล่งต้นตำรับ	Patton, M. Q. (2002). Qualitative Research and Evaluation Methods (3rd ed.). Sage. [Maximum variation sampling discussed in Chapter 5] ISBN: 978-0761919711	Patton, M. Q. (2002). Qualitative Research and Evaluation Methods (3rd ed.). Sage. Chapter 5: Purposeful Sampling. ISBN: 978-0761919711
ชื่อเรียกอื่น	field MVS, field-based purposeful maximum variation, maximum heterogeneity field sampling, diverse case field sampling	maximum variation sampling, maximum diversity sampling, MVS, heterogeneous sampling
ที่เกี่ยวข้อง	6	5
สรุป	Field-based maximum variation sampling is a purposive strategy in which a researcher deliberately selects field sites, ecological plots, communities, or observational units that span the widest possible range of relevant characteristics. By maximising heterogeneity among selected units, the approach ensures that both common patterns shared across diverse conditions and unique features specific to particular contexts are documented, making findings robust across a broad spectrum of real-world variation.	Maximum variation sampling is a purposive qualitative sampling strategy in which the researcher deliberately selects cases that span the widest possible range of variation on dimensions central to the study. The goal is not statistical representation but the identification of common patterns that cut across diverse cases as well as the documentation of the unique ways each context shapes the phenomenon under investigation.