A comprehensive review of decades of research linking screen time and child development found small but consistent associations between greater screen use and modestly poorer outcomes in learning, speech and emotional regulation. The analysis covered nearly three million children across 64 countries and was published in JAMA Pediatrics. Findings are correlational, so causation is not proven; newer studies showed stronger links, possibly because modern devices are more interactive. Experts recommend balanced, practical strategies—like device-free meals and protecting sleep and play—and urge further research to clarify cause and effect.
Large Review Finds Greater Screen Time Tied to Slightly Worse Child Development — What Parents Should Know
The study analyzed research carried out over decades. - Thanasis Zovoilis/The Image Bank RF/Getty Images
A major review of decades of research found that higher screen time is associated with modestly poorer developmental outcomes in children, particularly for learning, speech and emotional regulation. The analysis combined data from nearly three million children across 64 countries and was published in JAMA Pediatrics.
Study Overview
The research team, led by senior author Sheri Madigan, professor of psychology at the University of Calgary, examined decades of studies on screen use and child development. The pooled evidence covered children aged 18 and under from a diverse set of countries and settings.
Key Findings
Overall, the review found that greater screen time was associated with poorer outcomes across several developmental areas — thinking and learning, speech and language, behavior and emotional regulation. Most associations were small in size, similar to other common predictors of child development, but they may still matter given how widespread screen exposure is.
"We found that overall, greater screen time was associated with poorer outcomes for children across several areas of development," Madigan said. "Small does not mean meaningless, particularly when the exposure is nearly universal."
Why Newer Studies Show Stronger Links
The authors noted that more recent studies tended to show stronger associations than older work. Madigan suggested this could reflect how screen experiences have changed: two decades ago children often watched television; today devices are portable, interactive and tailored to the user, which may affect how screens interact with a child’s development.
Context, Caveats, and Expert Views
Importantly, the review is correlational and cannot prove causation. Madigan and colleagues acknowledge it is possible that children with developmental difficulties use screens more, rather than screens causing those difficulties. Independent experts praised the study’s scale and methodology but cautioned that the review could not reliably separate effects by specific types of digital use (for example, social media versus passive video viewing).
Esther van Sluijs, professor of behavioral epidemiology, noted that the paper is "high-quality" but warned there was limited data to draw firm conclusions about particular kinds of screen activities.
Practical Advice for Families and Policymakers
Madigan said parents should not assume screens are inherently harmful; digital technologies can support learning, creativity and social connection. At the same time, screens can displace essential activities — sleep, physical activity, unstructured play and face-to-face interaction. Practical steps include identifying specific times or settings when screens interfere (for example, device-free dinners or a daily family tech curfew) rather than attempting blanket bans.
She also argued that responsibility should not rest solely with families: governments and institutions should provide clear guidance, support research, promote education, and ensure safeguards against online harms to help normalize healthy screen-use practices.
Next Steps for Research
The authors plan to investigate which children are most affected by different digital experiences and why. Disentangling directionality — whether screen use contributes to developmental challenges or whether struggling children gravitate toward screens — remains a priority.
Bottom line: There is a small but consistent association between greater screen time and modestly worse developmental outcomes. Families and policymakers should focus on how screens are used and protect time for sleep, activity and in-person interaction while further research clarifies causal links.
Help us improve.
