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Jonathan Haidt, PhD

Jonathan Haidt, PhD

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Social psychologist; moral psychology; adolescent mental health and attention.

Rising Teen Social Media Use Harms Cognitive Performance
Social•Mar 24, 2026

Rising Teen Social Media Use Harms Cognitive Performance

Powerful new longitudinal study finds that adolescents who increase their social media over a 2 year period show lower cognitive performance, compared to those who did not increase. Fom @jasonmnagata's team, using ABCD data, and controlling for all the right stuff.

By Jonathan Haidt, PhD
Jury to Decide: Meta Confirms Social Media Addiction
Social•Mar 22, 2026

Jury to Decide: Meta Confirms Social Media Addiction

The jury in Los Angeles will soon return its verdict on whether social media is addictive. Meta's own researchers said it is. See this quote, and many others, in my new review paper laying out 7 lines of evidence: https://t.co/n6RfRkXbeW https://t.co/F2KubzNIIT

By Jonathan Haidt, PhD
Exploring How Social Media Impacts Regional Happiness
Social•Mar 19, 2026

Exploring How Social Media Impacts Regional Happiness

Join us today at 3pm EDT for a zoom discussion of links between social media and happiness. We'll discuss today's World Happiness Report and what we can learn from it about regional variation in well-being and social media use. Via...

By Jonathan Haidt, PhD