On this episode of the Knowledge Project, I’m joined by the fascinating Dan Ariely. Dan just about does it all. He has delivered 6 TED talks with a combined 20 million views, he’s a multiple New York Times best-selling author, a widely published researcher, and the James B Duke Professor of Psychology and Behavioral Economics at Duke University.

For the better part of three decades, Dan has been immersed in researching why humans do some of the silly, irrational things we do. And yes, as much as we’d all like to be exempt, that includes you too.

In this captivating interview, we tackle a lot of interesting topics, including:

The three types of decisions that control our life and how understanding our biases can help us make smarter decisions
How our environment plays a big role in our decision making and the small changes we can make to automatically improve our outcomes
The “behavioural driven” bathroom scale Dan has been working on to revolutionize weight loss
Which of our irrational behaviors transfer across cultures and which ones are unique to certain parts of the world (for example, find out which country is the most honest)
The dishonesty spectrum and why we as humans insist on flirting with the line between “honest” and “dishonest”
3 sneaky mental tricks Dan uses to avoid making ego-driven decisions
“Pluralistic ignorance” and how it dangerously affects our actions and inactions (As a bonus, Dan shares the hilarious way he demonstrates this concept to his students on their first day of class)
The rule Dan created specifically for people with spinach in their teeth
The difference between habits, rules, and rituals, and why they are critical to shaping us into who we want to be

This was a riveting discussion and one that easily could have gone for hours. If you’ve ever wondered how you’d respond in any of these eye-opening experiments, you have to listen to this interview. If you’re anything like me, you’ll learn something new about yourself, whether you want to or not.

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#33 Dan Ariely: The Truth About Lies

The Knowledge Project with Shane Parrish