In this episode, we discuss two new studies from the Journal of the American Medical Association that provide concrete evidence on the cognitive costs of screen exposure during childhood. One study tracks social media's impact on cognitive performance in adolescents, revealing measurable deficits even with moderate use. The second study follows early childhood screen time and its association with academic achievement up to grade six. The findings underscore the need for early intervention, protective educational environments, and a critical re-evaluation of how digital tools are integrated into learning. Learn how the Walled Garden approach can preserve cognitive capacities essential for deep learning and democratic participation.

00:00 Introduction: The Impact of Screen Exposure on Childhood Development

00:22 Study 1: Social Media Use and Cognitive Performance

02:07 The Marketplace Mirror Model and Cognitive Costs

02:41 Neuroplasticity and Attention in Adolescence

04:50 Study 2: Early Childhood Screen Time and Academic Performance

07:12 The Walled Garden Approach: Principles and Practices

11:34 Actionable Steps for Schools and Parents

14:32 Conclusion: The Stakes and the Path Forward