You are asking two different questions.  A schizophrenic may have an altered view of his/her own reality and may not be aware of his/her acts.  A person must be aware of his/her acts in order for a polygraph to work.  A pathological liar, however, does know that he/she committed the offense in question and understands … Read more

No.  Recent studies have shown that people who try to "beat" the polygraph by using various techniques taught on the internet actually make their scores worse than they would have if they hadn't tried them.  A legitimate examiner can not be beat with today's technology which produces a 90 to 95% accuracy rate.  -  Michael … Read more