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Home » Mel Robbins Podcast: Dr. Leanne ten Brinke Interview (Transcript)

Mel Robbins Podcast: Dr. Leanne ten Brinke Interview (Transcript)

Read the full transcript of manipulation expert Dr. Leanne ten Brinke’s interview on The Mel Robbins Podcast, July 20, 2026.

Editor’s Note: In this episode of the Mel Robbins Podcast, host Mel Robbins sits down with forensic psychology professor Dr. Leanne ten Brinke to discuss how to spot hidden manipulators and toxic personalities. Drawing on her best-selling book Poisonous People, Dr. ten Brinke breaks down the four traits of the “dark tetrad”—psychopathy, narcissism, Machiavellianism, and sadism—and how they manifest in everyday environments like workplaces and family dynamics. From this interview, you will learn practical tools to identify consistent behavioral patterns, set better boundaries, and reclaim their personal peace.

INTRODUCTION

MEL ROBBINS: Please help me welcome Dr. Leanne ten Brinke to the Mel Robbins Podcast.

DR. LEANNE TEN BRINKE: Thank you for having me. I’m so excited to be here.

MEL ROBBINS: I am so excited that you flew in all the way from British Columbia because I am fascinated by your field of expertise and your research, and our team devoured your bestselling book, Poisonous People. And what I’d love to have you do is, if the person listening applies everything that you’re about to teach us from your studies of deception and dark personalities, and they apply it starting today, what will change?

DR. LEANNE TEN BRINKE: I think they learn how to reduce one of the biggest stressors in all of our lives. Because dark personalities — and I’m not talking about the super extreme clinical levels here necessarily — people who are just consistently callous and manipulative in our lives.

Everyone has someone in their lives that kind of might be popping into their head right now. The manipulative sister-in-law, the boss at work who just needs all the attention and takes all the credit for your work, the callous mother-in-law. I get a lot of callous mother-in-laws in the comments.

These are people who cause us incredible amounts of stress. They divide us. They make us think that everyone is terrible, when that’s not the case. They erode norms of polite conduct. They enshrine competition where cooperation would be so much better for everybody. Basically, this one bad apple can really ruin the barrel. And I think today I’m hoping to give people some tools to stop that rot.

What Is a Dark Personality?

MEL ROBBINS: You know what was amazing as you were talking is it probably happened for you as you were listening to Dr. ten Brinke. I started to have situations and people pop into my mind. And one of the things that I wondered almost immediately, because as you talked about, these are a huge source of stress — you talked about callous, manipulative, they divide us, they make you think other people are terrible, they stir up controversy and competition.

Is it always someone who’s doing it overtly, or would this apply to somebody who’s maybe a little bit more victimy and softer in their approach? Because I want to start the conversation by having people in your mind that cause you stress so that you can think specifically about how to apply this.

DR. LEANNE TEN BRINKE: Yeah. We define dark personalities as the overlap between specific dark personalities — which I’m sure we’ll get into — as this kind of nexus of callous, manipulative, and hostile. And they certainly know what they’re doing.

One of the questions I often get is, do these people realize that they are this way? And the answer is yes, because we often measure these personality traits with a self-report. We ask them, is this characteristic of you? And they’ll say, yeah, that sounds like me. Like, I don’t have any remorse. I am a born leader. I am okay manipulating other people to get my way, and I don’t feel bad about it.

So it’s not like they don’t realize that they are this way, but they don’t necessarily care or they’re not concerned about the impact on other people. That’s that callous piece. That combination of manipulativeness and callousness — I’m going to take advantage of you, I’m going to tell lies, and then I don’t really worry about the consequences or how that makes you feel.

MEL ROBBINS: I’m so happy that you just defined callous because that was going to be my next question. So manipulative means my behavior does impact you, and callous means I don’t really care that it does.

DR. LEANNE TEN BRINKE: Yeah.

MEL ROBBINS: So what does a poisonous person look like in day-to-day life?

DR. LEANNE TEN BRINKE: A poisonous person has elevated levels of callousness, manipulativeness, and hostility toward other people. That’s the core of dark personality traits.

MEL ROBBINS: Okay.

DR. LEANNE TEN BRINKE: And if you’re trying to think of what that person looks like in your life —

MEL ROBBINS: Yes.

DR. LEANNE TEN BRINKE: They might be the boss who is consistently self-focused and takes advantage of all of the people that work underneath them, takes credit for their work, manipulates them perhaps into doing work that is not part of their job description, and then is like, oh, this is all about me.

It could be the manipulative mom at the PTA. She’s kind of pulling the strings, she’s spreading rumors, all so that she can maintain this position of power.

There are other versions too. You might have your friend’s new boyfriend who seems really, you know, sickeningly sweet around her but is actually really cruel to everyone else around him. It seems like he might be love bombing her — creating this beautiful sense of a future for them — but you see the pattern everywhere else, which is that he is callous, he doesn’t care about other people, he treats them poorly, he dominates people.

We see these personalities in all different aspects of our life because a personality is a consistent way of thinking, feeling, and behaving.