Digital screen exposure is reshaping the way young children’s brains develop. However, by inculcating healthy digital habits and setting boundaries, parents can safeguard their children’s cognitive, emotional, and social development

While latest neuroscience research has established that nearly 90 percent of brain development occurs before the age of eight, the human brain continues to develop throughout childhood and adolescence, particularly in regions responsible for executive functions such as planning, decision-making, impulse control, emotional regulation, social cognition and rewards processing.

The prefrontal cortex — the brain’s planning and decision-making centre — continues maturing well into early adulthood, while the limbic system, which governs emotions and reward-seeking, develops earlier. This developmental mismatch makes children and adolescents especially susceptible to seeking immediate rewards and instant gratification. And in the new digital age, mobile apps, games and social media platforms, deliberately engineered to maximise engagement through instant feedback, notifications and endless reels, are exploiting this vulnerability by constantly stimulating the brain’s reward pathways and reinforcing screen-dependent behaviour.

Dr. Tarun Singh

“Digital platforms exploit neurobiological vulnerability through rapid, high-intensity stimulation. Every notification, every ‘like’, every autoplay video triggers release of dopamine — the brain’s reward chemical. Unlike the satisfaction of outdoor play, creative learning, or a shared meal, digital rewards are immediate, frequent, and unpredictable. This creates a dopamine feedback loop that reinforces compulsive usage. Over time, this loop has measurable consequences. Children develop an urge for higher levels of stimulation, losing interest in quieter, slower activities such as reading and imaginative play. The ability to focus on low-stimulation tasks — studying, conversations — diminishes. Parents often notice the signs of digital dependence: children becoming irritable and restless in the absence of digital screens and input,” says Dr. Tarun Singh, pediatrician and newborns specialist at Kalpavriksh Healthcare, New Delhi.

According to Dr. Singh, these effects are more severe among adolescents. “Adolescence is a period of heightened emotional sensitivity and identity formation. Social media amplifies the pressures of peer comparison, FOMO (fear of missing out), and, at its worst, cyberbullying. Research increasingly links heavy social media use in adolescents to rising rates of anxiety, depression, and behavioural aberrations,” adds Singh.

Developing healthy digital habits

Dr. Singh believes that parents must take the lead in monitoring and regulating the duration and quality of digital content and screen use. He recommends the following:

• Start early, set firm limits. Avoid digital screens exposure for children under two years, except for video calls with family and friends. For older children, screen time should be structured and monitored.
• Create tech-free zones. Dining tables and bedrooms should be gadget-free. These spaces promote face-to-face communication — the most powerful way to develop children’s social and emotional skills.
• Protect sleep. Digital screens emit a blue light that suppresses release of melatonin and delays the onset of sleep. Switch off all digital devices at least one hour before bedtime and maintain a consistent sleep routine.
• Prioritise outdoor play. Daily outdoor physical activity is not optional — it is critical for children’s optimal brain development, emotional regulation, and physical health. It also reduces children’s dependence on digital screens.
• Model the behaviour you want. Children learn by observing adults. Parental screen habits — avoid phones at the dinner table, scrolling before bed — shape children’s relationship with devices as powerfully as any rule.

“The goal is not to raise screen-free children in a digital world — that is neither realistic nor necessary. The objective is to teach children to use digital media responsibly to ensure their developing brains have the time, space, and nourishment to develop their full potential,” says Dr. Singh.