WHAT DIFFERENCES EXIST IN DEVELOPMENTAL OUTCOMES BETWEEN CHILDREN WITH LOW VERSUS HIGH SCREEN EXPOSURE IN EARLY CHILDHOOD?

Abstract. High screen exposure in early childhood is consistently associated with modest reductions in developmental outcomes compared with lower exposure. For cognitive and language measures, studies report that children exposed to greater screen time exhibit lower developmental screening scores and delayed milestone achieve- ment. For example, one study finds standardized regression coefficients of –0.08 at 36 months and –0.06 at 60 months, while another documents coefficients of –0.15 (cognition) and –0.16 (language) by 14 months. When screen time is categorized (e.g., >1 hour/day or 8 hours/day), odds of language and cognitive vulnerabilities increase (odds ratio of 1.81 in one study) and overall scores are reduced ( as low as –0.73).

High screen use also relates to differences in behavioral and social outcomes. Several studies report that higher exposure is linked with more externalizing behaviors, lower social-emotional skills (with unstandardized coefficients around –7.8), and compromised school readiness. Distinct exposure trajectories—such as high- persistent use emerging in infancy—correlate with the most pronounced developmental deficits. One study further notes that media aimed at older audiences, in contrast to child-oriented content, accompanies lower cognitive–language scores. Measurements of screen time vary, with studies using parental reports and diverse categorizations, yet the overall pattern shows that high screen exposure is associated with less favorable developmental outcomes in early childhood.