Snowball or chain sampling
Snowball or chain sampling involves utilizing well informed people to identify critical cases or informants who have a great deal of information about a phenomenon. The researcher follows this chain of contacts in order to identify and accumulate critical cases. Often a few key informants or cases will be mentioned multiple times and take on additional importance.
Why use this method?
This method can be useful for identifying a small number of key cases that are identified by a number of key or expert informants as important cases or exemplars.
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