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Overcoming Bias Commenter's avatar

Poker players are an example of RH's class of "private professionals whose job is to detect lies," and I'm glad RF provided an example. I don't know what you mean by "criminologists," but I think that would fall under the category of public professionals, who do not seem to do very well, as RH said above, their livelihoods don't depend the quality of their work. I read in some secondary source, probably Gladwell, that although the median police aren't better than the median civilian, the proportion of really good police is higher. Perhaps Navarro is of this class. Or maybe that's not true, it's just easier to find good police because they get a reputation.

Re: criminals.Yes, the papers say they do better, but do they use studies designed without this objection in mind? I doubt it. Studies with half the people lying are probably cheaper than with 10%. An easy enough thing to check.

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Overcoming Bias Commenter's avatar

Joe Navarro, formerly of the FBI, went up against a psychic, a poker player (Annie Duke) and a few other people in a televised experiment to see who was best at detecting lies. Navarro and Annie were the best. If the question is "is there any group that is actually good at detecting lies?", my money is on the criminologists and poker players. After all, their livelihoods depend on it very directly.

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