Brain Rules for Baby (John Medina) / quote 50 of 91
TV damages toddlers' attention spans
TV also poisons attention spans and the ability to focus, a classic hallmark of executive function. For each additional hour of TV watched by a child under the age of 3, the likelihood of an attentional problem by age 7 increased by about 10 percent. So a preschooler who watches three hours of TV per day is 30 percent more likely to have attentional problems than a child who watches no TV. Just having the TV on while no one is watching—secondhand exposure—seemed to do damage, too, possibly because of distraction. In test laboratories, flashing images and a booming sound track continually diverted children from any activity in which they were otherwise engaged, including that marvelous brain-boosting imaginative play we discussed. The effects were so toxic for kids in diapers that the American Association of Pediatrics issued a recommendation that still stands today: Pediatricians should urge parents to avoid television viewing for children under the age of 2 years. Although certain television programs may be promoted to this age group, research on early brain development shows that babies and toddlers have a critical need for direct interactions with parents and other significant caregivers (e.g., child care providers) for healthy brain growth and the development of appropriate social, emotional, and cognitive skills. Current research projects are addressing the potential effect of TV on grades, and preliminary work suggests that it affects both reading scores and language acquisition. But after age 2, the worst effects on kids’ brains may come because television coaxes kids away from exercise, a subject we will examine when we get to video games.