Expert Opinion

Expert opinion is a judgment that applies knowledge to a domain-specific problem by a person with superior knowledge in that domain. The term therefore involves two concepts, domain specificity and superiority of knowledge—called expertise. Both are necessary for one to be in a position to offer expert opinion.

Expert opinion is based on judgment. Judgment is an integration task, integrating relevant available cues while excluding irrelevant cues and inferring unavailable information. Judgment becomes opinion with the inference of the unavailable information.


Domain specificity means that expertise in one domain does not necessarily transfer to another. An expert in medicine does not likely possess expertise in law. Although there are a few individuals who have training and experience in both domains, whether or not they maintain expertise ...

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