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Dictionary

PURPOSIVE SAMPLING

Paul Oliver

A form of non-probability sampling in which decisions concerning the individuals to be included in the sample are taken by the researcher, based upon a variety of criteria which may include specialist knowledge of the research issue, or capacity and willingness to participate in the research. Some types of research design necessitate researchers taking a decision about the individual participants who would be most likely to contribute appropriate data, both in terms of relevance and depth. For example, in life history research, some potential participants may be willing to be interviewed, but may not be able to provide sufficiently rich data. Researchers may have to select ...

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