Comparer des méthodes

	Échantillonnage à variation maximale	Échantillonnage de cas typiques
Domaine	Méthodologie d'enquête	Méthodologie d'enquête
Famille	Process / pipeline	Process / pipeline
Année d'origine	1985 (Lincoln & Guba); elaborated 1990–2002 (Patton)	1980s (systematized in Patton 1990/2002)
Auteur d'origine	Lincoln & Guba; systematised by Michael Quinn Patton	Michael Quinn Patton
Type	Purposive qualitative sampling strategy	Purposive qualitative sampling strategy
Source fondatrice	Patton, M. Q. (2002). Qualitative Research and Evaluation Methods (3rd ed.). Sage. Chapter 5: Purposeful Sampling. ISBN: 978-0761919711	Patton, M. Q. (2002). Qualitative Research and Evaluation Methods (3rd ed.). Sage Publications. ISBN: 978-0761919711
Alias	maximum variation sampling, maximum diversity sampling, MVS, heterogeneous sampling	typical case selection, modal case sampling, representative case sampling, average case sampling
Apparentées	5	5
Résumé	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.	Typical case sampling is a purposive strategy in which the researcher deliberately selects cases that represent what is ordinary, normal, or most common within a target group. Rather than seeking outliers or the widest possible variation, the goal is to illustrate and communicate what a typical experience, program, or phenomenon looks like to stakeholders or audiences unfamiliar with it. The strategy is widely used in qualitative evaluation research and program reporting.