Thomas Lu

Our modern world is saturated with awards. From elementary school classrooms to Hollywood to the hallways of academia, there's no shortage of prizes — and people who covet them. Yet we rarely stop to ask, do they work? We pose that question to economist Bruno Frey, who argues that awards can have a powerful, positive effect on our behavior — but only if they're designed well.

In 1924, a 17-year-old girl was admitted to the Virginia State Colony for Epileptics and Feebleminded. The superintendent of the colony classified her as "feeble-minded of the lowest grade, moron class." With that designation, this girl, Carrie Buck, was set on a path she didn't choose. What happened next laid the foundation for the forced sterilization of tens of thousands of people. This week, we revisit a 2018 episode about the eugenics movement and one of the most tragic social experiments in American history.

Paul Rozin has been studying the psychology and culture of food for more than 40 years. And he's come to appreciate that food fills many of our needs, but hunger is just one. On this week's Radio Replay, we chew over the profound role that food plays in our lives. Then, we spit it all out — we study the ick factor that turns us off to cockroaches, skunks, and poop. Rachel Herz explains the sensation of disgust, and why it doesn't always come naturally. For more information about the research in this episode, visit https://n.pr/2UTf1p0.

We're used to the idea that rhetoric sways voters. But what about another element of language: a candidate's voice? This week on Hidden Brain, what happens when our political system and ancient biological rules meet. For more information about the research in this episode, visit https://n.pr/2Pe1Fog.

When most of us think about how we came to our political views, we often give a straightforward answer. We believe our stances on taxes, immigration or national security are shaped by those around us — our friends, parents, teachers. We assume our life experiences are the root of our political ideologies. But what if there is something deeper in us that drives the music we listen to, the food we eat — even the politicians that we elect? This week, we explore the role of biology in shaping our political identities.

After a disaster happens, we want to know whether something could have been done to avoid it. Did anyone see this coming? Many times, the answer is yes. So why didn't the warnings lead to action? This week, we explore the psychology of warnings with a visit to a smelly Alaskan tunnel, a gory (and fictional) murder plot, and even some ABBA.

If you live in a big city, you may have noticed new buildings popping up — a high-rise here, a skyscraper there. The concrete jungles that we've built over the past century have allowed millions of us to live in close proximity, and modern economies to flourish. But what have we given up by moving away from the forest environments in which humans first evolved? This week, we discuss this topic with psychologist Ming Kuo, who has studied the effects of nature for more than 30 years.

This week on the Hidden Brain radio show, we explore how the constantly evolving nature of languages can give us different ways of understanding ourselves as well as the world we live in.

Food fills many of our needs. Hunger is just one. Paul Rozin explains the profound role that food plays in our lives.

There can be a lot of psychological noise involved in learning. And mental chit chat can make learning hard. One solution, silence it with a click.