Human Lie Detector: The Top Sign They’re Lying to You, Catch Liars Instantly! - Dr Leanne ten Brinke (Video)
In this 7 Seprember 2026 published video, host Steven Bartlett talks with Dr. Leanne ten Brinke, Ph.D., an Associate Professor of Psychology and director of the Truth and Trust Lab at the University of British Columbia, who breaks down the science of deception and toxic behavior. Drawing from her extensive peer reviewed research and her eye opening book, Poisonous People, she shares practical, evidence based strategies to help you recognize dark personality traits to protect your mental well being. Are you dealing with a master manipulator? Learn how to identify the hidden red flags of liars, psychopaths and narcissists before they cause lasting damage.
In this episode, she explains:
■ The Warning Signs: How to spot the early behavioral red flags of the “Dark Tetrad” (psychopathy, narcissism, Machiavellianism, and sadism) before you get hurt.
■ The Manipulation Playbook: The exact psychological tactics toxic individuals use to control and deceive others, including what gaslighting actually means.
■ The Lie-Detector Myth: Why relying on eye contact, fidgeting, and body language is actually a terrible way to catch a liar.
■ The Two Faces of Narcissism: How to identify the different types (including why one completely crumbles at the slightest criticism), and the devastating toll of working for a psychopathic boss.
■ Defense Strategies: Proven techniques to outsmart dangerous personalities, set ironclad boundaries, and dramatically improve your life.
https://youtu.be/AcK_zgJjnoo
00:00:00 Intro
00:02:41 Why This Research Into Psychopathy Matters
00:03:18 Why Psychopathy Is Getting More Attention
00:04:26 Can You Spot a Psychopath in 5 Seconds?
00:05:50 How Facial Expressions Reveal What People Really Feel
00:09:17 Can You Predict If Someone Is Guilty?
00:10:19 Three Signs Someone Might Be Lying
00:14:06 Can Anyone Learn to Spot a Liar?
00:20:49 Why the Eye Contact Myth Gets Body Language Wrong
00:22:13 Psychopathy, Narcissism, Machiavellianism and Sadism Explained
00:35:10 The Biggest Myths About Psychopaths Debunked
00:36:48 How Common Are Dark Personality Traits?
00:38:25 Are Dark Traits Caused by Genetics or Childhood?
00:41:33 How to Increase Your Chances of Becoming a Good Parent
00:44:44 What Happens Inside a Psychopath’s Brain?
00:46:26 Can Dark Personality Traits Be Cured?
00:49:50 Ads
00:51:52 Why Being Lied to Makes You Feel Distant
00:57:34 Can You Be Warm and Competent at the Same Time?
01:00:17 Why Dark Personality Traits Don’t Get You Ahead
01:09:26 How to Spot Red Flags in Dating Profiles and Relationships
01:17:29 Ads
01:18:55 Why Setting Boundaries Matters More Than You Think
01:20:13 7 Rules for Dealing With Dark Personalities
01:24:10 How to Spot Gaslighting and Coercive Control
01:28:32 7 Rules for Dealing With Dark Personalities Continued
01:35:40 How to Communicate With Dark Personalities
01:38:31 How to Become a Better Detective of People’s Cues
01:39:03 Why You Should Avoid Face to Face Negotiations
01:42:56 Three Mistakes People Make With Dark Personalities
01:44:39 How the 10% Do the Damage and the Biggest Lie About Success
01:46:13 What Is the Greatest Lie We’ve All Been Told?
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