CLEANING UP YOUR MENTAL MESS with Dr. Caroline Leaf cover image

Lessons from the World's Longest Scientific Study of Happiness

CLEANING UP YOUR MENTAL MESS with Dr. Caroline Leaf

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The Longest Study on Happiness

The study started in 1938 and it's incredibly rare for two reasons. Most research that gets done is snapshots. But to follow people from the time they're teenagers all the way through life into old age, into death as is completely unusual. We've had a retention rate of 84% which is amazing. And so by keeping so many people with us all this time, we've been able to glean these stories of lives and then put numbers to them.

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