European Child & Adolescent Psychiatry, June 2026 | Marlene Ebster et al., University of Bayreuth
Heavy use of short-form video apps like TikTok, Instagram Reels, and YouTube Shorts is linked to worse attention, weaker memory, and higher rates of anxiety and depression in young people.
A systematic review of 42 studies covering more than 46,000 young people found that the pattern held across inattention, impulsivity, working memory, self-regulation, and addiction-like symptoms. The likely driver, researchers say, is the design of these apps rather than screen time itself.
Short-form video differs from television and standard social feeds in three ways: an algorithm selects the content instead of the user, the scroll never reaches a natural stopping point, and clips shift every few seconds. Two imaging studies found less gray matter in reward-related brain regions and weaker attention-related brain activity among heavy users.
Most of the underlying research relied on self-reported use captured at a single point in time, so the findings show a strong pattern rather than proven cause and effect. Young people with supportive families, consistent digital routines, or a basic understanding of how the algorithm works were less affected. “High exposure to [short-form videos] is frequently associated with less favorable mental-health indicators among young people,” the researchers concluded.
