Final answer:
The three-stage sampling approach proposed by Strauss and Corbin in qualitative research is called Theoretical sampling. It involves sampling and gathering data based on emerging theories and concepts during the research process.
Step-by-step explanation:
The term for the three-stage sampling approach proposed by Strauss and Corbin in qualitative research is Theoretical sampling. Theoretical sampling involves selecting participants and gathering data based on emerging theories and concepts during the research process. It is a key method used in grounded theory methodology, where researchers continuously sample and analyze data to develop and refine theoretical concepts.
An example of theoretical sampling in a study about ethnic diversity in a college could involve initially selecting participants from different ethnic backgrounds. As the research progresses, the researcher may then purposefully select additional participants based on the emerging theories and concepts related to ethnic diversity that are being developed.