In Episode 125, host Chris Hadnagy speaks with William Ortiz, a federal polygraph examiner who worked in the FBI for decades. In this discussion, you’ll learn how the polygraph works, how people try to fool the polygraph, and what agents and attorneys are really after when they receive the results of a polygraph examination. You’ll also hear some tips and tricks about deception that can inform your everyday interactions. 3 Key Points:   Polygraph is a tool alongside non-verbals and behavior analysis questions to determine whether someone is telling the truth.    Being nervous is part of taking the polygraph test. Being nervous will not affect the test, but helps to establish your baseline.  3.   When you ask someone a question, pay attention to whether they answer it. Then ask more questions to see where they lead.