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Criterion Sampling. Definition. Criterion sampling involves selecting cases that meet some predetermined criterion of importance (Patton, 2001, p. 238). For example: Every patient at a practice receives a satisfaction survey at the end of his or her visit.
In qualitative research, you sample deliberately, not at random. The most commonly used deliberate sampling strategies are purposive sampling, criterion sampling, theoretical sampling, convenience sampling and snowball sampling.
The chapter discusses different types of sampling methods used in qualitative research to select information-rich cases. Two types of sampling techniques are discussed in the past...
Purposeful sampling is widely used in qualitative research for the identification and selection of information-rich cases related to the phenomenon of interest. Although there are several different purposeful sampling strategies, criterion sampling appears to be used most commonly in implementation research.
Criterion sampling involves the identification of a particular criterion of importance, articulation of this criterion, and systematic review and study of cases that meet the criterion. The reason for undertaking criterion sampling is to identify major system weaknesses for improvement.
Criterion-i sampling, as a purposeful sampling strategy, shares many characteristics with random probability sampling, despite having different aims and different procedures for identifying and selecting potential participants.
We have chosen a mixed purposeful sampling, combining three different strategies that we considered the most consistent with our research purpose: intensity sampling, maximum variation sampling and confirming/disconfirming case sampling.
Criterion sampling involves reviewing and studying ‘all cases that meet some predetermined criterion of importance’ (Patton, 2002, p. 238). This approach is frequently employed by
Highlights. •. Outlines sampling considerations for qualitative research interviews. •. Links sampling to research integrity and rigor. •. Discusses issues of sample size in qualitative interviews. •. Suggests best practice for research reporting.
Criterion sampling • Used by those trying to construct a comprehensive understanding • Studies are sampled based on a predetermined criteria • Specific inclusion and exclusion criteria are clearly stated • Studies are then analysed as a whole: Stratified purposeful sampling