مقایسهٔ روش‌ها

	نمونه‌گیری موردی معمول	نمونه‌گیری حداکثر تنوع
حوزه	روش‌شناسی پیمایش	روش‌شناسی پیمایش
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1980s (systematized in Patton 1990/2002)	1985 (Lincoln & Guba); elaborated 1990–2002 (Patton)
پدیدآور	Michael Quinn Patton	Lincoln & Guba; systematised by Michael Quinn Patton
نوع	Purposive qualitative sampling strategy	Purposive qualitative sampling strategy
منبع بنیادین	Patton, M. Q. (2002). Qualitative Research and Evaluation Methods (3rd ed.). Sage Publications. ISBN: 978-0761919711	Patton, M. Q. (2002). Qualitative Research and Evaluation Methods (3rd ed.). Sage. Chapter 5: Purposeful Sampling. ISBN: 978-0761919711
نام‌های دیگر	typical case selection, modal case sampling, representative case sampling, average case sampling	maximum variation sampling, maximum diversity sampling, MVS, heterogeneous sampling
مرتبط	5	5
خلاصه	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.	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.