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The Water Cooler
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Drug-Sniffing Dogs
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<blockquote data-quote="Dave70968" data-source="post: 1465271" data-attributes="member: 13624"><p>Excellent article on the use of drug dogs.</p><p><a href="http://reason.com/archives/2011/02/21/the-mind-of-a-police-dog/singlepage" target="_blank">http://reason.com/archives/2011/02/21/the-mind-of-a-police-dog/singlepage</a></p><p></p><p>Interesting bits:</p><p></p><p></p><p></p><p></p><p>Regarding a controlled test:</p><p></p><p></p><p>Just a little point of interest for those who believe in impartial drug dogs. I emphasized the word "unintentional" for a reason: this isn't cop-bashing, but rather pointing out that subtle, unintentional cues resulting from psychological preconceptions can render the "impartial" well-trained dog to be a justification for a fishing expedition. (Read the story of <a href="http://en.wikipedia.org/wiki/Clever_Hans" target="_blank">Clever Hans</a> for more details; in a slightly different form, it's also why we do double-blind experiments instead of single-blind. Note that Clever Hans's trainer was never thought to have been a deliberate fraud, just unaware of what he was doing.)</p><p></p><p>So for those who think that everybody who has ever had a dog alert is up to no good, it looks like the statistics say that there's anywhere from a 1-in-2 chance to a 3-in-4 chance that he's perfectly innocent.</p><p></p><p>Here's the money quote:</p></blockquote><p></p>
[QUOTE="Dave70968, post: 1465271, member: 13624"] Excellent article on the use of drug dogs. [url]http://reason.com/archives/2011/02/21/the-mind-of-a-police-dog/singlepage[/url] Interesting bits: Regarding a controlled test: Just a little point of interest for those who believe in impartial drug dogs. I emphasized the word "unintentional" for a reason: this isn't cop-bashing, but rather pointing out that subtle, unintentional cues resulting from psychological preconceptions can render the "impartial" well-trained dog to be a justification for a fishing expedition. (Read the story of [URL="http://en.wikipedia.org/wiki/Clever_Hans"]Clever Hans[/URL] for more details; in a slightly different form, it's also why we do double-blind experiments instead of single-blind. Note that Clever Hans's trainer was never thought to have been a deliberate fraud, just unaware of what he was doing.) So for those who think that everybody who has ever had a dog alert is up to no good, it looks like the statistics say that there's anywhere from a 1-in-2 chance to a 3-in-4 chance that he's perfectly innocent. Here's the money quote: [/QUOTE]
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