1
Purposive sampling recruits teachers who implemented both the old and new curriculum so they can compare the two systems.
8 Nonprobability Sampling Examples
Use these examples to study structure, specificity, tone, and variation. They are demonstrations—not claims about a real person or organization unless the example itself makes that explicit.
Before you copy
What to notice in the examples
A good nonprobability sample is transparent about recruitment, uses criteria tied to the research purpose, seeks adequate variation or information richness, and does not overstate statistical representativeness.
- Purpose of the sample and the cases needed.
- Recruitment channel and eligibility rules.
- Approach such as purposive, quota, convenience, snowball, or theoretical sampling.
- Bias and transferability limits created by recruitment.
2
Quota sampling recruits equal numbers of first-time and repeat customers without random selection within each quota.
3
Convenience sampling uses volunteers at one event and clearly limits claims to that setting.
4
Snowball sampling asks initial participants in a hard-to-list occupational network to refer others who meet the study criteria.
5
Maximum-variation sampling deliberately includes small, medium, and large organizations.
6
Criterion sampling includes only documents that contain a formal risk assessment section.
7
Theoretical sampling adds cases during grounded-theory analysis to examine an emerging category.
8
Expert sampling interviews accessibility auditors with at least five years of relevant practice.
Keep the underlying decision or pattern, then replace the subject, evidence, relationship, constraints, and tone with details that belong to your situation. If your final line still works after swapping only one noun, it may be too close to the example.