MPs probing the link between smartphones and social media’s impact on children received a measured response from scientists, who emphasized the lack of definitive evidence connecting digital devices to lasting changes in brain structure or function.
Compulsory attendance before the Science, Innovation and Technology Committee featured researchers underscoring that most studies to date only show correlations, not causation, between screen use and cognitive development.
Professor Denis Mareschal of Birkbeck noted scarce causal research exists, particularly for infants and young children, while Sarah-Jayne Blakemore from Cambridge highlighted underdeveloped prefrontal cortex regions in adolescents, which may contribute to heightened digital engagement tendencies.
Dr. Dusana Dorjee from York focused on displacement theory, suggesting excessive screen time might reduce opportunities for language development, social skills practice, and sensory-rich activities crucial to cognitive growth.
The experts differentiated between digital experiences, acknowledging video calls can foster family bonds while questioning the value of passive algorithm-driven scrolling versus purposeful content engagement.
Regarding social media age restrictions, neuroscientific consensus proved elusive, with Blakemore stressing individual lifetime brain development patterns vary too significantly to support strict age cutoffs.
The discussion extended to AI companions, where researchers openly acknowledged the critical research gap surrounding how children interpret and absorb information from evolving artificial intelligence interfaces.
The session concluded with a clear theme: public concern about digital childhoodElephants is growing faster than the scientific understanding needed to address it meaningfully, creating a knowledge-action gap requiring urgent research prioritization.