Did the shift to smartphones raise adolescent self-harm rates, especially for girls?
Core argument: Self-harm episode rates among adolescents in the U.S., UK, Canada, Australia, and New Zealand have risen since 2010, with the increase especially pronounced for girls, reaching record-high levels in all five countries by 2015.
After examining data from the Anglosphere (U.S., UK, Canada, Australia, and New Zealand), I’ve found that one trend stands out above all others: the spike in anxiety, depression, and self-harm among adolescent girls that began in the early 2010s. Since 2010, rates of self-harm episodes have increased for adolescents in the Anglosphere countries, especially for girls. By 2015, self-harm episodes were at record-high levels in all five countries. I have added a shaded area on all graphs from 2010 to 2015, which is the period that Jon calls “The Great Rewiring of Childhood” in his forthcoming book, The Anxious Generation. It’s the five-year period when adolescence changed to a phone-based form; adolescents went from nearly all owning flip phones (or other basic phones) to nearly all owning smartphones with high-speed data plans and continuous (and nearly unlimited) access to the internet and social media.

