logo
episode-header-image
Jan 2024
25m 43s

Is mass hysteria more common than you th...

Phill Agnew
About this episode

In the middle ages hundreds of thousands of Europeans danced themselves to exhaustion. Some danced for weeks on end, many ended up dying of heart attacks and heat stroke. But why? What strange illness was causing this oddity? Turns out, it was all psychological. The dancing epidemic of the middle ages was one of the first noted examples of mass hysteria, a phenomenon where these individuals experience real illness, brought on by imagined ailments. Mass hysteria has been documented in 19th century nunneries, 20th century Palestine and 21st century CIA agents. Today, I attempt to figure out if mass hysteria is more common than we think—and I discover how the same phenomenon has changed the wine we drink, the podcasts we love, and the names we give our kids. 


Sign up to my newsletter: https://www.nudgepodcast.com/mailing-list


Tali Sharot’s book The Influential Mind: https://tinyurl.com/ytvpyuk2


AP Archive footage of the 1983 fainting epidemic: https://youtu.be/8qcQwbJFlsU?si=xgDYI2JWWfmOTJHj


Synchronised clapping: https://youtu.be/Au5tGPPcPus?si=PN_jRK2XQkGSTpgn

Up next
Jul 7
This single text made girls 45% more likely to get vaccinated
Can one text message save 100s of girls from cervical cancer? Today on Nudge, Niall Daly and Dr Giulia Tagliaferri discuss their county-wide study involving 55,000 girls. Their experiment had some eye-opening results, so I decided to copy it. I ran my own study on my listeners to ... Show More
22m 59s
Jun 30
A surprisingly effective way to persuade (almost) anyone
It’s a psychological principle that helped end South African apartheid. It reversed the Pope’s declining popularity. It reduced university students’ binge drinking by 30%. And can predict romantic breakups with 60% accuracy. Today, bestselling author Will Storr reveals the surpri ... Show More
25m 44s
Jun 23
I debunked psychology’s greatest myth
I interviewed 60 Brits to debunk one of psychology’s greatest myths. Priming is one of the best-known biases in behavioural science. Kahneman mentions it 35 times in his best-selling book Thinking Fast and Slow. And yet, I’m not convinced it really works. In five separate experim ... Show More
25m 2s
Recommended Episodes
Dec 2021
Selects: What Is Collective Hysteria?
Throughout the history of the world, there have been many cases of what is known as collective hysteria - groups of people, usually young women, who all exhibit the same physical symptoms of non-existent conditions. Is it psychosomatic? Is it group think? Find out in this classic ... Show More
42m 37s
Jun 2024
Pourquoi des strasbourgeois du 16e siècle sont-ils morts à force de danser ?
Le roman d'Horace McCoy, "On achève bien les chevaux", dont Sidney Pollack tira, en 1969, un film remarqué, évoque avec force ces marathons de danse organisés pendant la Grande Dépression, qui frappa les États-Unis durant les années 1930. Ils voyaient s'affronter des couples de d ... Show More
2m 7s
Apr 2024
Deadly Dancing Plague of 1518
When people think of Medieval diseases, hysterical dancing is not usually what first comes to mind. Yet in 14th and 15th century Germany, dozens of ordinary people claimed to be infected by the ‘dancing plague’. What was this mysterious phenomenon? What caused it? And was it even ... Show More
39m 31s
Jun 2023
Sonic Poison? The Genesis of Havana Syndrome
CIA agents in Havana complaining of mental fog, dizziness and ear pain in 2016. Children in Miami in 1974, hyperventilating and wracked with abdominal pain. A medieval outbreak of the “dancing plague”. A chorus of meowing nuns. These mysterious and seemingly disparate events may ... Show More
37m 4s
Mar 2020
Contagious behaviour
We all know that certain diseases are contagious, but sometimes behaviour is contagious as well. We take a look at some historical examples—such as the Tanganyika laughter epidemic of 1962, and the 1518 case of uncontrollable dancing—and we consider what might drive copycat crime ... Show More
29m 5s
Oct 2022
When You Can’t Trust the Stories Your Mind Is Telling
The National Institute of Mental Health estimates that nearly one in five adults in America lives with a mental illness. And we have plenty of evidence — from suicide rates to the percentage of Americans on psychopharmaceuticals — that our collective mental health is getting wors ... Show More
1h 7m
Oct 2021
Havana Syndrome: Over 200 Cases Documented Yet Cause Remains A Mystery
Since 2016, a number of U.S. diplomats and federal employees have reported symptoms of a mysterious illness, the so-called Havana Syndrome. The list of symptoms include hearing loud sounds, nausea fatigue, and dizzying migraines, among others. The cause of this mystery illness is ... Show More
12m 33s
May 2024
La Chorémanie
Durant l'époque médiévale et jusqu'à la renaissance des épidémie de chorémanie ont secoués l'Europe dans différentes régions!Aussi appelées Danse de Saint-Guy (ou de Saint-Jean-Baptiste) ou épidémie de danses, ces épisodes mystérieux voyaient de 1 à plusieurs centaines de personn ... Show More
1h 26m
Mar 2020
When the System Breaks Down, Leaders Stand Up
It began in the East. At least, that’s what the experts think. Maybe it came from animals. Maybe it was the Chinese. Maybe it was a curse from the gods. One thing is certain: it radiated out east, west, north, and south, crossing borders, then oceans, as it overwhelmed the world. ... Show More
11m 53s
Jan 2023
Introducing The Sound: Mystery of Havana Syndrome
In December 2016, a US official in Havana went to the embassy medical centre to report a debilitating and confounding  illness. The symptoms included headaches; nausea; hearing loss; problems with memory and vision – and its onset was characterized by hearing… something. A buzzin ... Show More
2m 12s