Live play gives toddlers’ learning brains a boost that screens cannot match

Research suggests infants and toddlers show stronger brain activity linked to attention, language and social learning during responsive interaction with adults than during passive screen viewing.

When parents are busy, it is often tempting to hand a baby a phone, tablet or television and hope the glowing screen buys a few quiet minutes. But research cited by Nautilus suggests that the moments infants spend in direct, back-and-forth interaction with a caregiver are far richer for brain development than passive viewing, and that screen exposure begins surprisingly early. Recent data from the United Kingdom indicate that most babies now have screen time every day, with 9-month-olds averaging about 41 minutes. A National Institutes of Health study also found that screen use can start in infancy and rises quickly through the toddler years.

The central question for researchers is not simply how much time young children spend in front of a screen, but what they miss when that screen replaces live interaction. Studies have long shown that infants learn language and social skills best through face-to-face exchange, shared attention and immediate feedback from adults. Work from the University of Washington, published in 2024, found that stronger neural responses to social interaction in early infancy predicted better language development later on, reinforcing the idea that conversation and engagement matter from the very start.

That concern was part of the backdrop for a Northwestern University study published in Brain and Language, in which researchers invited 49 parent-child pairs, with children aged 22 to 44 months, to play naturally with books, puzzles and toys while wearing EEG headgear. The team compared brain activity during ordinary play with activity recorded while the children watched video, including moments when a parent was present. The researchers found that brain-wave patterns linked with attention, social connection and learning were stronger during live play than during screen viewing.

Elizabeth Norton, a communication science and disorders professor at Northwestern, told Nautilus that the study’s value lay in its realism. Rather than forcing toddlers into highly controlled lab tasks, the researchers let them behave as they would at home, which made it possible to observe how learning-related brain activity emerges naturally. She also said the work suggests that shared viewing can be useful when it becomes a basis for conversation, but that the key ingredient is still adult participation rather than screen time alone.

Norton was careful not to claim that screens directly cause language delays. A separate review in the Journal of Pediatric Nursing has argued that the relationship between screen exposure and cognition remains correlational rather than causal, and the JAMA Pediatrics study on infant screen use likewise points to an association rather than a simple explanation. Even so, the broader pattern across recent research is consistent: babies and toddlers seem to show the most promising neural signs for learning when they are engaged with a responsive adult, especially in shared attention, turn-taking and conversation.

For parents and caregivers, the practical lesson is not that every minute of screen time is harmful, but that screens should not crowd out the real-time social exchange infants need most. Short bursts of viewing may sometimes be unavoidable, especially in the midst of ordinary family life. Still, the evidence now points in the same direction from several angles: the more a baby’s world is built around responsive human interaction, the more opportunities there appear to be for language, attention and social learning to take root.