QuoteAlso of adjudicative significance are any admissions of researching how to "beat" the polygraph. Suffice it to say, the worst thing you can do is to read-up in advance on how the polygraph actually works or listen to any of the internet hucksters purporting to have a magic formula for success. For more on this, see the section on counter-measures below.
QuoteThe final way an applicant can "fail" a polygraph is by using counter-measures in an attempt to defeat the test. Counter-measures can include tactics like controlled breathing or biting one's tongue during the examination. If discovered by the examiner – either through observation or examinee admission – counter-measures are considered an integrity issue and a surefire way to have a security clearance denied or revoked. They can also be difficult to challenge on appeal, particularly where the applicant has admitted to the misconduct.