Judgment sample

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Judgment sample, or Expert sample, is a type of random sample that is selected based on the opinion of an expert. Results obtained from a judgment sample are subject to some degree of bias, due to the frame and population not being identical. The frame is a list of all the units, items, people, etc., that define the population to be studied. Judgement sampling is noble to provide detailed information about the difficulties in obtaining the distinction. A random sample would provide less bias, but potentially less raw information. The downfalls of this system are significant as any non-random sample brings bias into question, which limits the types of statistical analyzes you may reasonably perform, and there are considerable limits to an experts ability to choose a good sample.


  • Deming, W. Edwards (1990). Sample Design in business research. John Wiley and Sons. p. 31. ISBN 0-471-52370-4.