[canadapups]

Wow, that is the interesting article, not the wikipedia one. Some excerpts:

"The groundbreaking approach is based on analyzing the bioelectric activity of the animals' brain and central nervous system"

"Because of errors in "signal behavior," the accuracy achieved by the traditional dog method is only 60 percent, says Zaripov. However, the new method being used has increased detection accuracy to nearly 100 percent."

[privong]

Interesting that it also seems to handle false positives well:

> Among other things, the new method makes it possible to detect "a false sit" (when a dog sits to signal that it has found something). "In traditional signal behavior, 'a dog's trick' is hard to detect: The dog does not smile, it does not wink," says Zaripov. "In this case, however, an encephalogram shows that the dog has a conscience. Deep down it knows that it has made a mistake. The reaction of its central nervous system is completely different."

[intrarTrode]

Encephalogram lie detectors for dogs, as they roam the airport. Each day begets a new, ever more interesting layer of futuristic hell.

I can imagine lie detectors being deployed to test whether I was motivated to order a hamburger because of an advertisement I noticed.