Approaches to sampling and case selection in qualitative research: examples in the geography of health
Approaches to sampling and case selection in qualitative research: examples in the geography of health
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DOI：
10.1016/s0277-9536(99)00350-0
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发表时间：
2000-04-01
影响因子：
5.4
通讯作者：
Washburn, S
中科院分区：
文献类型：
--
作者：
Curtis, S;Gesler, W;Washburn, S
本文重点讨论定性研究中的抽样（或案例选择）问题。尽管文献中包括一些关于定性抽样策略的非常有用的讨论，但在方法论讨论中，与如何收集或分析数据的问题相比，抽样问题似乎经常受到较少的关注。关于抽样的决定在许多定性研究中可能很重要（尽管在某些研究中它可能不是一个问题）。对于适用于抽样或案例选择的原则有不同的解释。那些拥护基于“扎根理论”方法的“理论抽样”的人在某种程度上反对那些提倡适合以现有社会理论体系为基础的研究的“有目的抽样”形式的人。多样性还源于许多不同的抽取适用于定性研究的有目的样本的方法。我们探讨了 Miles 和 Huberman 提出的框架的价值 [Miles, M., Huberman,, A., 1994. 定性数据分析, Sage, London.]，以评估作者在三个研究示例中采用的抽样策略。我们的例子包括三项研究，分别涉及以下选择：“治疗场所”；纳入国家抗疟政策的农村地区；被确定为慢性病或残疾的年轻男性受访者。这些例子用于说明在这三项研究中如何解决不同标准的（有时是相互冲突的）要求，以及所做出的选择决定对研究的潜力和限制。我们还考虑了迈尔斯和休伯曼建议的标准对于规划定性研究中的“样本”选择有多大帮助。 (C) 2000 Elsevier Science Ltd. 保留所有权利。
This paper focuses on the question of sampling (or selection of cases) in qualitative research. Although the literature includes some very useful discussions of qualitative sampling strategies, the question of sampling often seems to receive less attention in methodological discussion than questions of how data is collected or is analysed. Decisions about sampling are likely to be important in many qualitative studies (although it may not be an;issue in some research). There are varying accounts of the principles applicable to sampling or case selection. Those who espouse 'theoretical sampling', based on a 'grounded theory' approach, are in some ways opposed to those who promote forms of 'purposive sampling' suitable for research informed by an existing body of social theory. Diversity also results from the many different methods for drawing purposive samples which are applicable to qualitative research. We explore the value of a framework suggested by Miles and Huberman [Miles, M., Huberman,, A., 1994. Qualitative Data Analysis, Sage, London.], to evaluate the sampling strategies employed in three examples of research by the authors. Our examples comprise three studies which respectively involve selection of: 'healing places'; rural places which incorporated national anti-malarial policies; young male interviewees, identified as either chronically ill or disabled.The examples are used to show how in these three studies the (sometimes conflicting) requirements of the different criteria were resolved, as well as the potential and constraints placed on the research by the selection decisions which were made. We also consider how far the criteria Miles and Huberman suggest seem helpful for planning 'sample' selection in qualitative research. (C) 2000 Elsevier Science Ltd. All rights reserved.