Dr. Jane Tavyev Asher, Cedars-Sinai Guerin Children’s pediatric neurologist centers on broad concerns that pediatric neurologists and child health professionals raise about how too much screen exposure can affect children’s physical, emotional, behavioral, and psychological development. While the video itself focuses on clinical insights, the broader scientific literature reveals a complex web of interrelated impacts extending far beyond what is typically presented in short expert discussions.

In the video cognitive neuroscientist Dr. Jared Cooney Horvath discusses how widespread use of screens both in schools and at home — can interfere with the way young brains learn and process information. He highlights research suggesting that over the past century, children historically improved generation by generation on cognitive measures such as attention span, working memory, and literacy, largely because formal schooling and rich interpersonal learning environments promoted deep, human‑to‑human interactions. But as digital devices become ubiquitous in classrooms and in everyday life, this pattern appears to be reversing: students who spend extended hours with screens for learning tasks —especially five hours or more per day  show lower performance on standardized learning outcomes than peers with less reliance on screens, with declines in attention, memory encoding, literacy, and executive functioning.