Yep, that is the question/doubt. I personally believe that the polygraph is a senseless test, still when it is used to screen a "large" number of people more o

Yep, that is the question/doubt. I personally believe that the polygraph is a senseless test, still when it is used to screen a "large" number of people more or less in the same field (LEO, federal agences, army or similar), it should give a similar number of positives and negatives. If it is used only to verify if applicants are prone to "cracking under theatrical pressure", the result means that applicants for CBP are much more susceptible to that than most applicants to other police/security or similar jobs.