Childhood at Risk: Smartphones Threaten Health, Hope, and Happiness

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Introduction

Smartphones have transformed modern life, bringing convenience, connection, and access to endless information. For children and adolescents, these devices provide access to social networks, entertainment, and educational opportunities. But alongside the benefits comes a growing concern: what happens when children own smartphones too early?

A recent policy forum published in the Journal of Human Development and Capabilities by Tara C. Thiagarajan, Jennifer Jane Newson, and Shailender Swaminathan (2025) highlights the risks of childhood smartphone ownership before age 13. Drawing on large-scale international data from the Global Mind Project, the authors argue that early smartphone exposure is linked with poor mental health outcomes later in life. They call for society-wide policies to protect children’s developing minds, much like how we regulate tobacco, alcohol, or driving age.

This article summarizes their findings and explores how families, educators, and policymakers can act to safeguard children’s health and well-being.

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The Rise of Smartphones in Childhood

Since the early 2000s, smartphones have become an inseparable part of daily life. Children as young as six or seven now own personal devices and spend hours navigating AI-driven digital environments such as social media and video platforms.

These platforms rely on algorithms designed to maximize engagement. While this may sound harmless, in practice it means children are bombarded with curated content that exploits psychological vulnerabilities—from endless scrolling to harmful comparisons with peers (Costello et al. 2023; Raffoul et al. 2023).

This shift has disrupted traditional developmental activities such as:

• Face-to-face social interaction with peers and family
• Regular sleep patterns are disrupted as devices keep children awake
• Outdoor play and exercise, which are critical for brain and body health

The problem is not only the time spent on screens but also the nature of the content children are exposed to, including pornography, violence, and extremist ideologies (Common Sense Media 2022).

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About the Global Mind Project

To move beyond speculation, the authors rely on data from the Global Mind Project—a massive, open-access database that tracks mind health and well-being across cultures and countries.

At its core is the Mind Health Quotient (MHQ), a 47-item self-report tool that assesses emotional, social, and cognitive function. Scores range from −100 (distressed) to +200 (thriving), providing a spectrum view of mental health, not just symptoms like depression or anxiety (Newson, Sukhoi, and Thiagarajan 2024).

The project includes nearly 2 million participants across 163 countries, giving a rare global perspective on how digital habits shape mental health (Sapien Labs 2025a).

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What Happens When Kids Get Phones Too Early?

The evidence is clear: the younger a child receives a smartphone, the poorer their mental health outcomes as young adults.

• Those who got their first phone at age 13 had an average MHQ score of 30.
• Those who got a phone at age 5 scored close to 1—a dramatic decline (Thiagarajan, Newson, and Swaminathan 2025).

The drop was especially steep among females, with early phone ownership linked to higher rates of:

• Suicidal thoughts (48% in females who received a phone at age 5–6 vs. 28% at age 13)
• Hallucinations and detachment from reality
• Aggression and compulsive behaviors
• Diminished self-worth, confidence, and emotional resilience

Among males, the same pattern emerged, though less pronounced. Both groups reported weaker emotional control, empathy, and stability.

Importantly, these patterns were consistent across cultures and regions, suggesting a global developmental effect, not just a cultural one.

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Why Early Phones Harm Mind Health: The Pathways

The researchers explored how smartphones exert their negative effects, identifying several mediating factors:

1. Social Media Access
   • The biggest factor, explaining about 40% of the negative outcomes globally.
   • In English-speaking countries, it explained up to 70% of the damage.
   • Earlier access meant higher risks of cyberbullying, harmful comparisons, and exposure to sexual exploitation.
2. Family Relationships
   • Poor family interactions explained 13% of the harm.
   • Much of this stemmed from conflicts around online activity or secrecy.
3. Cyberbullying
   • Accounted for 10% of the risk globally, and far higher in some regions.
   • Many cases of depression, aggression, and self-harm were linked to online harassment.
4. Sleep Disruption
   • Contributed 12% to mental health decline, independent of social media use.
   • Late-night gaming, texting, and streaming prevent restorative sleep.

Interestingly, diet and sexual abuse played less of a role globally. However, in English-speaking countries, exposure to online sexual abuse explained 14% of the risk for females—a chilling reminder of how vulnerable children are in unregulated online spaces.

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The Policy Dilemma: Why Parents Alone Can’t Solve It

Some argue that parents should simply limit screen time or delay giving phones. But Thiagarajan and colleagues point out several barriers:

• Peer Pressure: A child without a smartphone risks social exclusion in schools where peers are constantly online.
• Algorithmic Manipulation: Expecting children to self-regulate against AI-driven apps is unrealistic; their brains are still developing.
• Spillover Effects: Even if a child avoids social media, they may face aggression or bullying from peers who are deeply immersed in digital culture.

This means that individual parental action is not enough. A societal approach, backed by policy, is necessary.

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Policy Recommendations

The authors propose a developmentally appropriate digital policy for children under 13—similar to how society restricts alcohol, tobacco, or driving.

1. Digital Literacy & Mental Health Education
   • Teach children about online risks, manipulation, and coping skills.
   • It should be mandatory to take a course on social media use before accessing social media, much like driver’s education precedes a license.
2. Corporate Accountability
   • Technology companies must enforce real age restrictions.
   • Penalties for allowing underage use should mirror those in tobacco/alcohol sales.
3. Ban Social Media for Under-13s
   • Enforce stricter controls so that children cannot access platforms like TikTok, Instagram, or Snapchat until they reach adolescence.
4. Restrict Smartphones Themselves
   • Provide “kids’ phones” with basic features (calls, messages, educational apps) but without unrestricted internet or social media.

While these measures may seem drastic, the authors argue they are proportional to the scale of harm observed. Just as society delayed driving privileges until 16 or 18, limiting smartphone access protects developing brains during vulnerable years.

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Disease Prevention and Future Generations

Why does this matter for disease prevention? Mental health is directly tied to physical health. Early exposure to harmful digital environments contributes to:

• Chronic stress → linked to cardiovascular disease, diabetes, and immune dysfunction
• Poor sleep → increases risk of obesity, depression, and hypertension
• Weakened self-worth and resilience → higher risk of substance abuse, suicide, and self-harm

By acting early, we can prevent not only psychiatric illness but also long-term chronic diseases rooted in stress and poor coping skills.

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A Call to Action

The findings of Thiagarajan, Newson, and Swaminathan should not be ignored. As they write, “waiting for irrefutable proof in the face of population-level findings risks losing the opportunity for timely, preventive intervention” (2025, p. 500).

Just as past generations tackled smoking, drunk driving, and child labor, we must now face the digital challenge. Protecting children from premature smartphone use is not about denying technology, but about giving their minds the chance to grow, develop resilience, and flourish.

Parents, educators, and policymakers share a responsibility:

• Parents can delay phone ownership until after 13 and encourage offline activities.
• Schools can teach digital literacy and promote screen-free environments.
• Policymakers can hold corporations accountable and set enforceable age limits.

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Conclusion

The digital world is here to stay. But childhood is a fragile period when the brain and sense of self are still forming. Giving children smartphones too early exposes them to harms they are not yet equipped to handle—cyberbullying, sleep disruption, addictive algorithms, and diminished self-worth.

By implementing precautionary policies and educating both children and parents, society can reduce the risks of mental illness, protect against future chronic diseases, and ensure that the next generation has the strength to thrive in an increasingly digital age.

Don’t Get Sick!

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References:

1. Costello, N., et al. “Algorithms, Addiction, and Adolescent Mental Health: An Interdisciplinary Study to Inform State-Level Policy Action to Protect Youth from the Dangers of Social Media.” American Journal of Law & Medicine, vol. 49, no. 2–3, 2023, pp. 135–172. https://doi.org/10.1017/amj.2023.25.
2. Newson, Jennifer J., O. Sukhoi, and Tara C. Thiagarajan. “MHQ: Constructing an Aggregate Metric of Population Mental Wellbeing.” Population Health Metrics, vol. 22, no. 1, 2024, p. 16. https://doi.org/10.1186/s12963-024-00336-y.
3. Raffoul, A., et al. “Social Media Platforms Generate Billions of Dollars in Revenue from U.S. Youth: Findings from a Simulated Revenue Model.” PLoS One, vol. 18, no. 12, 2023, e0295337. https://doi.org/10.1371/journal.pone.0295337.
4. Sapien Labs. Mental State of the World in 2024. 2025a. https://doi.org/10.17605/OSF.IO/ZQF9R.
5. Thiagarajan, Tara C., Jennifer Jane Newson, and Shailender Swaminathan. “Protecting the Developing Mind in a Digital Age: A Global Policy Imperative.” Journal of Human Development and Capabilities, vol. 26, no. 3, 2025, pp. 493–504. https://doi.org/10.1080/19452829.2025.2518313.

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