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| 加权滚雪球抽样× | 目的性抽样× | |
|---|---|---|
| 领域 | 调查方法论 | 调查方法论 |
| 方法族 | Process / pipeline | Process / pipeline |
| 起源年份≠ | 1997 | Formalized ~1980–1990 |
| 提出者≠ | Douglas D. Heckathorn (formal probability-weighted variant) | Michael Quinn Patton (systematic articulation); roots in early qualitative inquiry |
| 类型≠ | Probability-adjusted chain-referral sampling | Non-probability sampling strategy |
| 开创性文献≠ | Heckathorn, D. D. (1997). Respondent-driven sampling: A new approach to the study of hidden populations. Social Problems, 44(2), 174–199. DOI ↗ | Patton, M. Q. (1990). Qualitative Evaluation and Research Methods (2nd ed.). Sage. ISBN: 978-0803937796 |
| 别名 | weight-adjusted chain-referral sampling, probability-weighted snowball sampling, WSS, weighted referral sampling | judgmental sampling, selective sampling, criterion-based sampling, purposeful sampling |
| 相关≠ | 5 | 4 |
| 摘要≠ | Weighted snowball sampling is a chain-referral technique in which participants recruit peers from a hidden or hard-to-reach population, and differential inclusion probabilities are estimated and corrected through statistical weights. Unlike basic snowball sampling, the weighting step allows approximately unbiased population estimates, bridging the gap between convenience-driven recruitment and probability-based inference. | Purposive sampling is a non-probability strategy in which the researcher deliberately selects participants, documents, or cases that are information-rich with respect to the research question. Rather than drawing units at random, the researcher applies explicit criteria aligned with the study's purpose, maximising the depth and relevance of the data collected. It is the default sampling logic in most qualitative research designs and is also used in mixed-methods and applied evaluative work. |
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