Explain the three types of nonprobability sampling techniques commonly used to select samples for qualitative research studies.
The three types of nonprobability sampling techniques used for qualitative research are purposive sampling, snowball sampling, and convenience sampling. Purposive sampling means that researchers choose participants arbitrarily for their unique characteristics, experiences, attitudes or perceptions. Snowball sampling means that the participants refer researchers to others how have characteristics, experiences, or attitudes similar to or different from their own. Convenience sampling means that the researchers select any readily available individuals as participants.