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Podcasts / The Diary Of A CEO with Steven Bartlett

Human Lie Detector: The #1 Sign They’re Lying To You, Catch Liars Instantly! | Dr Leanne ten Brinke

Sep 7, 2026 · 1h 44m · YouTube

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0:00How long does it take someone to spot a psychopath?
0:02About five seconds.
0:04So most people think a psychopath looks dangerous.
0:06They picture the villain in a movie, but that's not how it works in real life.
0:10We've done some research in my lab and we found there are certainly some things that you can look for.
0:14Have they ever done that with lying to figure out if people can spot lies?
0:18thousands of times.
0:19You ask people what's the number one cue that someone is lying to you, they will say they can't look you in the eye, but there's no research to suggest that that is true.
0:27However, there's an essential tool for detecting lies, which is... Oh, fuck.
0:33I know I study dark personality traits, and I found that there's four different elements, which are psychopathy, Machiavellianism, narcissism, and sadism.
0:41And what we found is that people with higher levels of these traits engaged in Duchenne's smiles, which is the activation around the eyes.
0:48And they also used a lot of hand gestures.
0:50Where does this come from?
0:51Well, research suggests that abuse, cold, uncaring parenting style, but also overvaluation of a child early in life may lead to more narcissistic views later.
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