What have sampling and data collection got to do with good qualitative research?

Abstract

Objective: To highlight the importance of sampling and data collection processes in qualitative interview studies, and to discuss the contribution of these processes to determining the strength of the evidence generated and thereby to decisions for public health practice and policy. Approach: This discussion is informed by a hierarchy-of-evidence-for-practice model. The paper provides succinct guidelines for key sampling and data collection considerations in qualitative research involving interview studies. The importance of allowing time for immersion in a given community to become familiar with the context and population is discussed, as well as the practical constraints that sometimes ope..