⊿ Point. {R} Glossary. ◢ Keyword: P. ◥ University. {q} PhD. {tr} Training. ⚫ UK. ↂ EndNote. ☢️ Convenience. ☢️ NRS. ☢️ Purposive. ☢️ Quota. ☢️ Representative. ☢️ Sample. ☢️ Snowball. ☢️ Volunteer. ☢️ NPS. ☝️ Weerakkody. ✊ La (2004) Nonprobability sampling. From Wikipedia, the free encyclopedia Sampling method Thus, one cannot say the same on the basis of a nonprobability sample than on the basis of a probability sample. The grounds for drawing generalizations (e.g., propose new theory, propose policy) from studies based on nonprobability samples are based on the notion of "theoretical saturation" and "analytical generalization" (Yin, 2014) instead of on statistical generalization. Researchers working with the notion of purposive sampling assert that while probability methods are suitable for large-scale studies concerned with representativeness, nonprobability approaches are more suitable for in-depth qualitative research in which the focus is often to understand complex social phenomena (e.g., Marshall 1996; Small 2009).
One of the advantages of nonprobability sampling is its lower cost compared to probability sampling. Nonprobability sampling is however widely used in qualitative research. See also[edit] References[edit]