Порівняння методів

	Вибірка відхилених випадків на основі польових досліджень	Вибірка типових випадків
Галузь	Методологія опитувань	Методологія опитувань
Родина	Process / pipeline	Process / pipeline
Рік появи	1980s–1990s (purposive/deviant case sampling literature)	1980s (systematized in Patton 1990/2002)
Автор методу	Michael Quinn Patton; Yvonna Lincoln & Egon Guba	Michael Quinn Patton
Тип	Purposive qualitative sampling strategy	Purposive qualitative sampling strategy
Основоположне джерело	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 Publications. ISBN: 978-0761919711
Інші назви	field deviant case sampling, outlier case sampling in field research, extreme case sampling in fieldwork, in-situ deviant case sampling	typical case selection, modal case sampling, representative case sampling, average case sampling
Пов'язані	5	5
Підсумок	Field-based deviant case sampling is a purposive strategy that deliberately selects cases deviating markedly from an established pattern or norm, with data collected through direct fieldwork — observation, in-situ interviews, and ethnographic engagement — in the participants' natural settings. By studying outliers on-site, researchers gain contextually grounded insight into why and how certain cases diverge from the typical pattern.	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.