How polygraph tests work (and can they really tell if you're lying?)

Polygraph tests can supposedly detect when a person is lying. But how can a machine do that, and can we really trust the ...
Sun Sentinel

Asking Eric: My cheating husband failed the polygraph, but still he says I’m making things up

Asking Eric: My cousin’s premonition has sent my life from bad to worse Asking Eric: My fiancé’s family is so self-centered I stopped visiting them Asking Eric: I have a spouse, and a crush on a ...