Former FBI Agent Explains How to Detect Lying & Deception | Tradecraft | WIRED

there are a number of myths about deception detection people believe that if someone looks away or gaze aversion is an indicator of deception or bringing the hand to the mouth or the jaw that could also be an indicator of deception or grooming gestures like fixing their hair or settling the clothing and so

forth or fidgeting in your chair all those things are potential indicators of deception but there's no universal indicator of deception [Music] criminal behavioral analysis is the umbrella term that covers all the work that we did at the FBI's Behavioral Analysis Unit that includes criminal profiling active listening interview and interrogation and deception detection we

also study teach consult on and conduct investigative interviews investigative interviews can be broken down into non confrontational interviews and interrogations but the goal of both of them is to get accurate and reliable information to get there one of the tools that we use is deception detection where we take a holistic approach and

looking at many different types of indicators we look at fight-or-flight cognitive complexity and perception management as three different ways of detecting deception fight-or-flight is nothing more than noting the physiological changes that occur when someone's under stress stress can indicate lying for example decrease in salivation so make somebody swallow deeply or increased heart rate or increased

adrenaline to the hands and legs because our primitive brain wants to tell us to either stand and fight or run away so it provides extra energy to your limbs when you're sitting there in an interrogation and you want to run but you can't many times you'll fidget with your hands or your legs or you'll bring them up and