Qualitative Sampling Techniques: From Practice to Theory

Abstract

The paper examines the vital role of sampling in qualitative research, highlighting how methodological decisions influence the credibility and depth of findings. It begins with an overview of sampling in qualitative studies before discussing four main methods: convenience sampling, purposive sampling, snowball sampling, and theoretical sampling. Each method is evaluated based on its rationale, use, advantages, and drawbacks. Convenience sampling is accessible but may introduce bias; purposive sampling depends on researcher judgment to select meaningful cases; snowball sampling facilitates access to hidden groups through participant networks; and theoretical sampling, based on grounded theory, promotes conceptual development via iterative data collection. By illustrating these approaches from practical to theoretical perspectives, the paper shows the dynamic relationship between method choice and research aims. The discussion concludes with a summary that integrates insights from all methods, providing a framework for aligning sampling techniques with epistemological positions and research design. Ultimately, the study highlights that careful sampling is not just a procedural step but a key methodological requirement for producing rigorous and meaningful qualitative research.