MANILA, July 14 — For communities across Asia watching their children grow up with smartphones and tablets in hand, the research of Dr. Jean Twenge has become a touchstone. The San Diego State University psychology professor has spent years documenting what many parents here already suspect: that heavy screen time is reshaping childhood, and not always for the better.
Twenge, author of the 2017 book “iGen: Why Today’s Super-Connected Kids Are Growing Up Less Rebellious, More Tolerant, Less Happy—and Completely Unprepared for Adulthood,” has become one of the most cited voices in the global debate over digital technology and youth mental health. Her work draws on large-scale surveys of U.S. adolescents, but the patterns she identifies resonate far beyond American borders.
The three-hour threshold
In a 2018 study published in the journal Emotion, Twenge and her colleagues found a clear statistical link between device use and mental health. Adolescents who spent more than three hours per day on electronic devices were 34% more likely to report poor mental health compared to peers who used screens less. That three-hour mark has become a reference point for families and educators alike.
For many households in the Philippines and across Southeast Asia, where children often share devices or rely on smartphones for homework, the finding raises urgent questions about how to set boundaries without cutting off access to education.
Beyond the numbers
Twenge’s research has shown that increased screen time is associated with higher rates of depression and anxiety, as well as lower cognitive performance. These are not abstract findings. For a mother in Manila watching her teenager scroll through social media late into the night, or for a teacher in Jakarta noticing students struggling to concentrate after hours of gaming, the research offers both validation and a warning.
The professor has testified before the U.S. Congress on the impact of social media and screens on youth. Her work is frequently cited in debates about educational technology and its effects on cognitive development — a conversation that has only grown more urgent as schools across Asia integrate digital tools into classrooms.
Closer to home, the implications are clear. While Twenge’s data comes from American adolescents, the devices and platforms are the same. The pressures of social media, the pull of endless notifications, the erosion of sleep and face-to-face connection — these are not confined to any one country.
What it means for families across the region is a question that policymakers, educators, and parents are still grappling with. Twenge’s research provides a factual foundation for that conversation, grounded in large-scale data rather than anecdote.
As the debate over screen time continues, one thing is certain: the findings from San Diego State University will remain central to how we understand the digital generation — not just in the United States, but for communities everywhere trying to raise healthy children in a connected world. Consult your doctor for medical advice.
Sources
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