Screen time and doomscrolling statistics

In a randomized study of 143 students, limiting Facebook, Instagram and Snapchat to 10 minutes each per day (about 30 minutes in total) for three weeks significantly reduced loneliness and depression compared with using them as usual.

Source: Hunt, Marx, Lipson & Young (2018), Journal of Social and Clinical Psychology

Caveat: Small sample of undergraduates; the 30-minute figure is the total of three 10-minute caps, not a single limit. Self-esteem and general well-being did not improve.

In the same study, both groups, including the one that kept using social media normally, became less anxious and had less fear of missing out, which the authors put down to simply tracking their own use.

Source: Hunt, Marx, Lipson & Young (2018), Journal of Social and Clinical Psychology

Caveat: Both groups improved, so this is an observation, not a controlled effect.

Economists at Stanford, NYU and Microsoft Research estimated, from a randomized experiment, that self-control problems cause about 31% of social media use, and found that letting people set limits on their future screen time meaningfully reduced their use.

Source: Allcott, Gentzkow & Song (2022), "Digital Addiction", American Economic Review

Caveat: The 31% is a model-based estimate from the working paper, not a direct measurement.

The same study found people underestimate how habit-forming their phone use is and are partly unaware of their own self-control problems.

Source: Allcott, Gentzkow & Song (2021), "Digital Addiction", NBER Working Paper 28936

In a randomized experiment with 2,844 Facebook users, deactivating Facebook for four weeks raised subjective well-being, increased offline time with friends and family, and led to a lasting drop in Facebook use afterwards.

Source: Allcott, Braghieri, Eichmeyer & Gentzkow (2020), "The Welfare Effects of Social Media", American Economic Review

Caveat: The well-being gains were small but statistically significant. US users in 2018.

In experiments with nearly 800 people, simply having your own smartphone nearby, even silenced and face down, reduced working memory and fluid intelligence, with the biggest effect on people most dependent on their phones.

Source: Ward, Duke, Gneezy & Bos (2017), "Brain Drain", Journal of the Association for Consumer Research

Caveat: Lab study; effect sizes and replications vary.

The US Surgeon General's 2023 advisory says adolescents who spend more than three hours a day on social media face double the risk of poor mental health outcomes such as symptoms of depression and anxiety.

Source: U.S. Surgeon General (2023), Social Media and Youth Mental Health advisory

Caveat: About adolescents (13-17), not adults; it is an association, not proof of cause.

Up to 95% of 13- to 17-year-olds in the US use a social media platform, and more than a third say they use social media almost constantly.

Source: U.S. Surgeon General (2023), Social Media and Youth Mental Health advisory

Caveat: US teens.

Nearly half of US teens aged 13 to 17 say they are online almost constantly, roughly double the 24% who said so in 2014-15.

Source: Pew Research Center (2024), Teens, Social Media and Technology

Caveat: US teens, survey of 1,391.

The average internet user aged 16 to 64 spends about 2 hours 21 minutes a day on social media, according to DataReportal's Digital 2026 report.

Source: DataReportal (2026), Digital 2026 Global Overview Report

Caveat: Survey-based global average across 50+ countries; varies a lot by country and age.

Screen-time arithmetic: one hour a day is 365 hours a year, about 15 full 24-hour days. Counting only waking hours (16 a day), every 16 years of a one-hour-a-day habit costs a full year of waking life. Three hours a day from age 25 to 85 adds up to about 11 years of waking life.

Source: doomscroll.ai calculation (hours per day x 365, divided by 16 waking hours)

Caveat: Simple arithmetic, not a study. Show the working when you use it.