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Judging Experts: Australian Magistrates’ Evaluations of Expert Opinion Quality
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Expert opinions admitted by courts are not always valid and reliable. However, we know little about how indicators of opinion quality affect the persuasiveness of an expert. In this study 25 Australian magistrates and 22 jury-eligible lay-people rated the persuasiveness (via credibility, value, and weight) of either a high or a low quality expert opinion. Opinion quality was determined using attributes specified in the Expert Persuasion Expectancy (ExPEx) framework: Field, Specialty, Ability, and Trustworthiness. Both magistrates and jurors were significantly more persuaded by the high than the low quality expert opinion. Magistrates were also significantly more sceptical of the expert opinion than lay-people, and when given the opportunity sought information that was logically relevant to their decision. These results suggest that magistrates can differentiate between high and low quality expert opinions, but it is unclear if the information they need for the task is actually available for use during trials.
Title: Judging Experts: Australian Magistrates’ Evaluations of Expert Opinion Quality
Description:
Expert opinions admitted by courts are not always valid and reliable.
However, we know little about how indicators of opinion quality affect the persuasiveness of an expert.
In this study 25 Australian magistrates and 22 jury-eligible lay-people rated the persuasiveness (via credibility, value, and weight) of either a high or a low quality expert opinion.
Opinion quality was determined using attributes specified in the Expert Persuasion Expectancy (ExPEx) framework: Field, Specialty, Ability, and Trustworthiness.
Both magistrates and jurors were significantly more persuaded by the high than the low quality expert opinion.
Magistrates were also significantly more sceptical of the expert opinion than lay-people, and when given the opportunity sought information that was logically relevant to their decision.
These results suggest that magistrates can differentiate between high and low quality expert opinions, but it is unclear if the information they need for the task is actually available for use during trials.
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