The time children spend watching television or playing computer games (screen time) has measurable and long-term effects on their brain function. Published in the peer-reviewed journal Early Education and Development, the analysis of 33 studies involving over 30,000 participants under the age of 12 demonstrates both negative and some positive impacts on brain development.
The comprehensive review of 23 years of neuroimaging research, led by Chair Professor Hui Li from the Education University of Hong Kong, emphasizes changes in the pre-frontal cortex, parietal lobe, temporal lobe, and occipital lobe of the brain due to screen time. These areas are crucial for executive functions, sensory processing, memory, language, and visual interpretation.
HIGHER SCREEN TIME AND ABILITIES
While the study acknowledges potential positive effects, it predominantly leans toward the negative impacts, citing influences on attention, executive control abilities, inhibitory control, cognitive processes, and functional connectivity. Notably, higher screen time is associated with lower functional connectivity in brain areas related to language and cognitive control, potentially hampering cognitive development.
NEED FOR SUITABLE GUIDANCE AND SUPPORT
The researchers refrain from advocating strict limits on screen time, recognizing the challenges it poses for parents. Instead, they urge policymakers to provide guidance and support for positive brain development through innovative and practical strategies. The study calls for evidence-based policies to navigate the digital era and safeguard children’s brain development.
Lead author Dr. Dandan Wu highlights the implications for educators and caregivers, emphasizing the need for suitable guidance and support in children’s digital use. The researchers recommend future studies, including longitudinal research, to further explore the impact of different types and modes of digital use on brain functions.
