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The Inconvenient Truth About Convenience and Purposive Samples
1Dept. of Clinical Psychopharmacology and Neurotoxicology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India.
Indian Journal of Psychological Medicine
|August 5, 2021
Summary
Research using convenience and purposive sampling limits generalizability to the specific population studied. Proper sampling techniques are crucial for valid research design and interpretation, impacting study findings significantly.
Area of Science:
- Social Sciences
- Medical Research
- Psychology
Background:
- Most research relies on convenience and purposive sampling methods.
- These samples are drawn based on accessibility or specific study-defined characteristics.
- Generalizability of findings from such samples is often limited.
Purpose of the Study:
- To clarify concepts of convenience and purposive sampling.
- To illustrate good and bad practices in sampling.
- To discuss the implications for research validity.
Main Methods:
- Conceptual explanation of sampling techniques.
- Illustrative examples of appropriate and inappropriate sampling.
- Discussion of internal and external validity concerns.
Main Results:
- Convenience and purposive samples restrict findings to their specific (sub)population.
- Examples highlight potential pitfalls and best practices in sampling.
- Internal and external validity are key considerations for these sampling methods.
Conclusions:
- Effective sampling is vital for robust research design and accurate interpretation.
- The importance of sound sampling techniques is often underestimated.
- Adopting rigorous sampling practices is essential for advancing scientific knowledge.
Keywords:
Convenience samplingdatabase studiesenriched samplesexternal validityinternal validitypurposive samplingMore Related Videos
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