পদ্ধতির তুলনা করুন

	বিচ্যুতিমূলক দৃষ্টান্ত নমুনায়ন	সর্বোচ্চ বৈচিত্র্য নমুনায়ন
ক্ষেত্র	জরিপ পদ্ধতি	জরিপ পদ্ধতি
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	1990	1985 (Lincoln & Guba); elaborated 1990–2002 (Patton)
প্রবর্তক	Michael Quinn Patton	Lincoln & Guba; systematised by Michael Quinn Patton
ধরন	Purposive qualitative sampling strategy	Purposive qualitative sampling strategy
মৌলিক উৎস	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
অপর নাম	extreme case sampling, outlier sampling, negative case sampling, deviant-case selection	maximum variation sampling, maximum diversity sampling, MVS, heterogeneous sampling
সম্পর্কিত	5	5
সারসংক্ষেপ	Deviant case sampling is a purposive qualitative sampling strategy in which the researcher intentionally selects cases that are unusual, exceptional, or markedly different from the norm — outliers, extreme successes, or conspicuous failures. The goal is not statistical representation but deep learning from cases that illuminate the boundaries of a phenomenon, challenge prevailing assumptions, or reveal processes that typical cases obscure.	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.