Importance The American Academy of Pediatrics (AAP) recommends limits on screen-based
media use, citing its cognitive-behavioral risks. Screen use by young children is prevalent
and increasing, although its implications for brain development are unknown. Objective To
explore the associations between screen-based media use and integrity of brain white
matter tracts supporting language and literacy skills in preschool-aged children. Design,
Setting, and Participants This cross-sectional study of healthy children aged 3 to 5 years (n …