Theory-based sampling involves selecting cases according to the extent to which they represent a particular theoretical construct.
Purposive sampling is used as the population of the particular theoretical construct is difficult to determine.
Examples
An example of a common theory used in development is capacity development. Theoretical criteria on how capacity is developed within an organization or community can assist in selecting cases for study.
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'Theory-based sampling' is referenced in:
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Framework/Guide
- Rainbow Framework :