The mental-health-decline curve has the same shape and inflection year across countries that share little besides a common smartphone-adopti
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abstract: The mental-health-decline curve has the same shape and inflection year across countries that share little besides a common smartphone-adoption window in 2010–2013.
text: The mental-health-decline curve has the same shape and inflection year across countries that share little besides a common smartphone-adoption window in 2010–2013.
date created: 2026-05-01T21:23:54.529Z
date published: 2026-05-01T21:23:54.529Z
date modified: 2026-05-01T21:43:13.579Z
author: Person
publisher: Isonomia
is part of: Showcase: Smartphones, social media, and adolescent mental health
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citation: CDC — Youth Risk Behavior Surveillance (YRBS)
citation: UNICEF Innocenti — Report Card 17: Places and Spaces (2022)
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Showcase: Smartphones, social media, and adolescent mental health
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text: The mental-health-decline curve has the same shape and inflection year across countries that share little besides a common smartphone-adoption window in 2010–2013.

https://www.isonomia.app/c/0a4dfc2c16292da987cf2cafb9c95681197ec85a491471dea2b018fb0430b69f
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type: InformationNode
text: Beginning around 2012, adolescent rates of major depressive episodes, emergency-department visits for self-harm, and completed suicides rose sharply and roughly contemporaneously across the U.S., U.K., Canada, Australia, and the Nordic countries — the same set of countries in which a majority of teens acquired smartphones, and in which image-based social platforms became dominant, during the 2010–2013 window.

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CDC — Youth Risk Behavior Surveillance (YRBS)
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  date created: 2026-05-01T21:33:05.736Z
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  date created: 2026-05-01T21:43:23.245Z

UNICEF Innocenti — Report Card 17: Places and Spaces (2022)
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description: Children's well-being depends on multiple, interacting environmental factors; no single policy lever is sufficient.