fupolys, I am an American Polygraph Association certified PCSOT examiner who has conducted hundreds upon hundreds of these so-called "tests," most of them sexual history "tests," administered in a state prison for convicted sexual offenders in treatment for their societal transgressions.
My advice...
If your are GUILTY of any sexual offenses or associated deviancies, disclose EVERYTHYING (and I mean everything) prior to your sexual history "test" -- which is little more than a fishing expedition designed to gain admissions.
But... If your are INNOCENT of your alleged sexual crimes, learn everything you can about the sexual history polygraph "test," and, if possible, arrange multiple practice sessions with a certified PCSOT examiner prior to your official "test."
Why? Good question.
In my opinion, polygraph "testing" is biased against the innocent. Most pro-polygraph propagandists downplay that notion, but that's a separate conversation.
Now, let's get back to the sexual history "test"...
In polygraph circles, it seems that the world's foremost authority on sexual history polygraph testing is the current president of the American Polygraph Association, Raymond Nelson.
It may behoove you to see what APA president Raymond Nelson has to say about the sexual history "test" on his own web site:
http://raymondnelson.us/pcsot/pcsot.swfAgain, if you are guilty, there is precious little hope for escaping the polygraph. But, if you are innocent, it seems to me that pro-active protective measures are not irrational.
Good luck. In any case, you'll need it.
How come? Because polygraph "testing" has no proven and universally accepted scientific basis. What's more, examiner competence varies widely. Beyond that, a plethora of variables holds sway over each and every polygraph "test."
Even the American Polygraph Association's home-grown research -- thought by many to be wildly optimistic -- places best-case multiple-issue polygraph "test" accuracy at about 85%, meaning that the odds of an unfavorable outcome (i.e., a false result) are roughly equivalent to the odds in Russian roulette.
All things considered, then, the polygraph "test" is very much a crapshoot.
That's why United States Supreme Court Justice Clarence Thomas, writing in U.S. v Scheffer, said that even the best of polygraph exams are plagued by uncertainty. Learn more here:
http://www.daubertontheweb.com/polygraph.htm