In the this discussion about the time children spending on screens has gotten more complicated as researchers move beyond the straightforward questions about how many hours young people spend on phones, tablets, and computers. It looks like new studies published in 2026 indicate that screens have a relationship with the developing brain that may be more nuanced than the well-established principle that screens can be more harmful with the more hours spent on them.
Recently, a study used data of over 10,000 brain scans from the huge Adolescent Brain Cognitive Development, or ABCD, project investigated links between screen use and brain development.
They identified varied developmental trajectories within the regions :, rather than a simple common trend across the whole brain: this distinction is significant because the adolescent brain is undergoing a great deal of neurological change. Brain systems that control decision making, self-control and other higher cognitive processes develop into the teen years, as certain reward-related syst in the 2026study, higher use was linked to faster developmental trajectories in some regions of the reward network and slower trajectories in regions of the control network.
The researchers employed state-of-the-art diffusion-based indices of cellular microstructure, which revealed findings that more conventional brain-imaging measures did not. That does not mean that cell phonesor other screensare definitively shown to cause long lasting damage to the brains of teenagers. This study only shows a link, not that screen time necessarily can cause the significant changes to the brain that the authors noted.
Lifestyle, environment and individual variation all have an effect on development. Additional recent studies also support somewhat more cautious messages.
A systematic review in 2026 drawing on nine neuroimaging studies of children from birth to 12 years of age, found that high levels of screen exposure were often tied to differences in brain structure and connectivity; the review also found some evidence of positive associations for structured, interactive digital activities with a select set of skills; working memory, spatial skills, fine motor performance. This is a motivation for why researchers are slowly separating out different categories of screen time.
Watching videos over extended periods, playing an interactive education game, finishing schoolwork, chatting with family across the screen, drawing a piece of digital artall might be very cognitively different experiences.
The context in which we use screens might be just as important as the time. A study in 2026 that looked at over 8,000 children discovered that various combinations of physical and digital activities were linked to variations in brain structure and mental health.
The authors stressed that the interaction between activity type and social vs. nonsocial activities is an avenue for future research. A other recent study offers an interesting insight by focusing on a different variable social media. When examining a sample of 7,614 early adolescents with MRI scans, researchers found that increased time spent on social-media platforms was related to a thinner cortex and smaller brain volume. But, the reports detail correlations instead of causations.