Is anyone familiar with the Cia polygraph examination administered to new applicants? I have heard that multiple tests are actually given over a relatively short period of time (a weekend) when the perspective employee goes to the "farm" for the last stage in the selection process. If this is true, could they  be trying to employ a strategy based upon sleep deprivation that would curtail one's use of countermeasures (e.g. spotting the control questions)?
Thank you