#174 Latest Harvard Research! "Children's Declining Concentration" Linked to Brain Development and Screens

In recent years, you may have heard about the phenomenon of an increasing number of children who cannot concentrate in class. From reaching for a smartphone while doing homework to getting easily distracted even when listening to someone talk—Harvard University's latest research reveals that there is actually a deep cause behind these changes that relates to brain development itself. In this episode of the podcast "Education Cafe Terrace," we explore why children's concentration is declining based on that research, and how we can support them.

According to a 2025 study from Harvard University, a major reason why children are unable to concentrate in class lies in the combination of "brain development" and the "digital environment." During early childhood, when the brain is developing rapidly, continuous exposure to excessive screen time can distort the maturation of neural circuits, making it difficult to cultivate long-lasting attention. In particular, it has been confirmed that "instant-reward digital stimuli," such as games and social media, tend to promote short bursts of focus while weakening the ability to think deeply and develop patience.

The research shows that this is not just a problem of "too much screen time." The childhood brain develops the ability to maintain attention slowly through "non-digital experiences" such as tactile play, human conversation, and being read picture books. However, for children who are constantly bombarded with massive amounts of visual stimuli, the rapid switching of information creates "attention residue," where their minds remain tethered to the screen stimuli they just saw, even when they try to focus on studying or reading.

To address these challenges, Professor Phil Capin of the Harvard Graduate School of Education developed a new integrated program called "SPARK" (Supporting Attention and Reading for Kids). This is a groundbreaking support method that trains "reading skills" and "concentration skills" simultaneously. The research shows that 25–40% of children who struggle with reading also have issues with attention, and that supporting the two separately yields limited results. SPARK incorporates breathing techniques and pacing to sustain focus while breaking down short texts, fostering both attention and reading comprehension through play.

Furthermore, MRI research by Associate Professor Nadine Gaab has shown that signs of reading difficulties and concentration problems can appear as early as the preschool stage of brain development. In other words, by providing appropriate support before children enter elementary school, it is possible to leverage the brain's plasticity (its ability to change flexibly) to build a foundation for concentration. The importance of this "early intervention" is arguably the most critical point for educators and families to focus on right now.

On the other hand, the factors that rob children of their concentration are not limited to learning. Sleep deprivation is also a major issue. Using a smartphone before bed lowers the quality of sleep and significantly reduces concentration the next day. Additionally, Harvard experts point out that we cannot overlook the fact that children are being deprived of "boredom." Time spent feeling bored is actually essential for "regulating inner attention." It is while wandering through thoughts or daydreaming that creativity and self-regulation are honed.

This episode features the striking phrase, "turning boredom into a space for creativity." Stepping away from screens, spending time idly in nature, or playing directly with friends—the perspective that these simple experiences hold the power to restore concentration will likely provide new insights for many parents and educators. And this is not just about learning efficiency; it also connects to "social concentration," such as the ability to build relationships and understand emotions.

In short, the key to nurturing a child's concentration lies not only in the "brain" but also in the "environment" and "how we interact." While utilizing educational apps and digital materials, how can we ensure time for learning through real-world experiences? Rethinking that balance is a challenge for the future of education. This talk is packed with hints for reviewing how we design lessons and how we spend time at home.

For more details on this topic, be sure to listen to the podcast "Education Cafe Terrace." We delve deeply into "how to nurture the concentration children naturally possess" while moving between the latest brain science and the realities of the classroom. By listening, you might even find new discoveries about your own "relationship with concentration."

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