This is the transcript for episode 133 of the You Are Not So Smart Podcast.

In 1990, psychologist Walter Michel’s and his team released a landmark study into delayed gratification.

They offered kids a single marshmallow now, or two marshmallows later if they could resist temptation for 20 minutes. They found that the children who could wait were more likely to be successful later in life. They had higher test scores on the SAT, lower divorce rates, higher incomes, lower body mass indexes, and fewer behavioral problems as adults.

Today, if you go to YouTube and search for “The Marshmallow Test” you will find thousands of videos in which parents test their children to see if they can wait for the marshmallow. It’s understandable, because throughout the early 2000s, a slew of TED talks, popular books, and viral articles suggested that you could use the test to portend your child’s chances at reaching their life goals — and its fun and easy and you can eat all the extra marshmallows.

The marshmallow test is now one of the most well-known studies in all of psychology, right up there with the Milgram shock experiments and the Stanford prison experiment, but a new replication suggests we’ve been learning the wrong lesson from its findings for decades.

On April 22, Misha Glouberman of How to Talk to People About Things sat down with David McRaney of You Are Not So Smart in Toronto at the Gladstone Hotel to talk in front of a sold-out crowd abiut  David’s upcoming book on how minds change.

What makes you happy? As in, what generates happiness inside the squishy bits that reside inside your skull?

That’s what author and neuroscientist Dean Burnett set out to answer in his new book, Happy Brain, which explores both the environmental and situational factors that lead to and away from happiness, and the neurological underpinnings of joy, bliss, comfort, love, and connection.

In the episode you’ll hear all that and more as we talk about what we know so far about the biological nature of happiness itself.

In this episode of the You Are Not So Smart Podcast we sit down with my friend and one of my favorite journalists, author Will Storr, whose new book just hit the shelves here in the United States. It’s called Selfie: How We Became so Self-Obsessed, and What it is Doing to Us.

The book explores what he calls “the age of perfectionism” — our modern struggle with our many modern pressures to meet newly emerging ideals and standards that tell us if we are falling short of the person we ought to be – and how that struggle to be that person is an impossible task. As he says in the book, “perfectionism is the idea that kills,” and you’ll hear him explain what he means by that in the interview.

Common sense used to dictate that men and women should only come together for breakfast and dinner.

According to Victorian historian Kathyrn Hughes, people in the early 19th Century thought the outside world was dangerous and unclean and morally dubious and thus no place for a virtuous, fragile woman. The home was a paradise, a place for civility, where perfect angelic ladies could, in her words, “counterbalance the moral taint of the public sphere.”