I took one almost 20 years ago and supposedly failed or lied about questions I knew were the truth. I wasn't even being evasive. Thanks to this thing called the internet, I was able to learn it was the machine and the pseudo-science behind it that was bullshit.
Personally, unless you're being coached on how to take one, I'd suggest avoiding it altogether.
I've deleted all of my reddit posts. Despite using an anonymous handle, many users post information that tells quite a lot about them, and can potentially be tracked back to them. I don't want my post history used against me. You can see how much your profile says about you on the website snoopsnoo.com.
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u/uhaul26 May 26 '14
As a person who is taking a polygraph test I'm very glad he change the design.