Early screen exposure in infancy may significantly impact brain development and anxiety levels in teenagers, according to a long-term study conducted in Singapore.
New research suggests that early exposure to screens during infancy can leave lasting imprints on brain development, influencing how teenagers think, make decisions, and cope with anxiety. This long-term study was conducted in Singapore and led by Tan Ai Peng, an Assistant Professor at the A*STAR Institute for Human Development and Potential, in collaboration with the NUS Yong Loo Lin School of Medicine. The findings were published in the peer-reviewed journal eBioMedicine.
The study utilized data from the Growing Up in Singapore Towards healthy Outcomes (GUSTO) cohort, a comprehensive research initiative that has tracked children from birth into adolescence. By following the same individuals for over a decade and combining behavioral assessments with repeated brain scans, researchers identified potential biological links between early-life screen exposure and later mental health outcomes.
The research specifically focused on the first two years of life, a critical period when the brain develops at an accelerated pace and is particularly sensitive to environmental influences. During this time, screen exposure is largely determined by parents and caregivers, making it essential for early guidance.
The team monitored 168 children from the GUSTO cohort, conducting brain scans at ages 4.5, 6, and 7.5. This longitudinal approach allowed researchers to observe how brain networks evolved over time rather than relying on a single snapshot. This makes the study the first of its kind to link screen exposure in infancy with brain development patterns measured over more than ten years.
Children who experienced higher levels of screen exposure before the age of two exhibited accelerated maturation of brain networks associated with visual processing and cognitive control. Interestingly, screen time measured at ages three and four did not produce the same effects, reinforcing the notion that the earliest years are uniquely sensitive.
“Accelerated maturation occurs when certain brain networks develop too quickly, often in response to adversity or strong external stimulation,” said Huang Pei, the study’s first author. “During typical development, brain networks gradually become more specialized. However, in children with high screen exposure, networks related to vision and cognition became specialized earlier, before efficient connections supporting complex thinking had fully developed. This premature specialization may reduce flexibility and resilience, making it harder for children to adapt later in life.”
The implications of these findings extend beyond early childhood. At age 8.5, children with these altered brain patterns took longer to make decisions during cognitive tasks. By age 13, those same children reported higher levels of anxiety, indicating a long-term link between early brain changes, decision-making speed, and emotional well-being.
In a related study published in Psychological Medicine in 2024, the same research team identified a potential protective factor: parent-child reading. Children whose parents read to them frequently at age three showed a significantly weaker association between early screen exposure and altered brain networks. Researchers believe that shared reading provides experiences that screens cannot replicate, including two-way interaction, language development, emotional connection, and responsive communication.
“This research provides a biological explanation for why limiting screen time in the first two years is so important,” said Assistant Professor Tan. “At the same time, it shows that parental engagement—especially activities like reading together—can help mitigate some of the negative effects.”
The study involved researchers from the National University Hospital, KK Women’s and Children’s Hospital, and McGill University. Their findings add new biological evidence to support existing recommendations that limit screen exposure in infancy.
Experts suggest that the results could inform early childhood policies, healthcare guidance, and everyday parenting practices. While screens have become a common aspect of family life, this research underscores the importance of the first two years and highlights that simple, low-cost interventions—such as reading and responsive interaction—can significantly support healthy brain development.
The findings reinforce a growing scientific consensus: in early childhood, human interaction is more beneficial than screen time, and small choices made early can shape emotional and cognitive outcomes for years to come, according to Source Name.



















































































